Mercurial > octave-nkf
changeset 3046:639808eda8eb
[project @ 1997-06-06 22:11:57 by jwe]
| author | jwe |
|---|---|
| date | Fri, 06 Jun 1997 22:11:59 +0000 |
| parents | d2046ca9a380 |
| children | 540812544d0d |
| files | readline/doc/history.dvi readline/doc/history.html readline/doc/history.info readline/doc/history.ps readline/doc/readline.0 readline/doc/readline.dvi readline/doc/readline.html readline/doc/readline.info readline/doc/readline.ps |
| diffstat | 9 files changed, 0 insertions(+), 14512 deletions(-) [+] |
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--- a/readline/doc/history.html Fri Jun 06 22:08:11 1997 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1062 +0,0 @@ -<HTML> -<HEAD> -<!-- This HTML file has been created by texi2html 1.51 - from /usr/homes/chet/src/bash/readline-src/doc/hist.texinfo on 16 April 1997 --> - -<TITLE>GNU History Library</TITLE> -</HEAD> -<BODY> -<H1>GNU History Library</H1> -<H2>Edition 2.1, for <CODE>History Library</CODE> Version 2.1.</H2> -<H2>March 1996</H2> -<ADDRESS>Brian Fox, Free Software Foundation</ADDRESS> -<ADDRESS>Chet Ramey, Case Western Reserve University</ADDRESS> -<P> -<P><HR><P> - -<P> -This document describes the GNU History library, a programming tool that -provides a consistent user interface for recalling lines of previously -typed input. - -</P> -<P> -Published by the Free Software Foundation <BR> -675 Massachusetts Avenue, <BR> -Cambridge, MA 02139 USA - -</P> -<P> -Permission is granted to make and distribute verbatim copies of -this manual provided the copyright notice and this permission notice -are preserved on all copies. - -</P> -<P> -Permission is granted to copy and distribute modified versions of this -manual under the conditions for verbatim copying, provided that the entire -resulting derived work is distributed under the terms of a permission -notice identical to this one. - -</P> -<P> -Permission is granted to copy and distribute translations of this manual -into another language, under the above conditions for modified versions, -except that this permission notice may be stated in a translation approved -by the Foundation. - -</P> -<P> -Copyright (C) 1989, 1991 Free Software Foundation, Inc. - -</P> - - - -<H1><A NAME="SEC1" HREF="history_toc.html#TOC1">Using History Interactively</A></H1> - -<P> -This chapter describes how to use the GNU History Library interactively, -from a user's standpoint. It should be considered a user's guide. For -information on using the GNU History Library in your own programs, -see section <A HREF="history.html#SEC6">Programming with GNU History</A>. - -</P> - - - -<H2><A NAME="SEC2" HREF="history_toc.html#TOC2">Interactive History Expansion</A></H2> -<P> -<A NAME="IDX1"></A> - -</P> -<P> -The History library provides a history expansion feature that is similar -to the history expansion provided by <CODE>csh</CODE>. This section -describes the syntax used to manipulate the history information. - -</P> -<P> -History expansions introduce words from the history list into -the input stream, making it easy to repeat commands, insert the -arguments to a previous command into the current input line, or -fix errors in previous commands quickly. - -</P> -<P> -History expansion takes place in two parts. The first is to determine -which line from the previous history should be used during substitution. -The second is to select portions of that line for inclusion into the -current one. The line selected from the previous history is called the -<STRONG>event</STRONG>, and the portions of that line that are acted upon are -called <STRONG>words</STRONG>. Various <STRONG>modifiers</STRONG> are available to manipulate -the selected words. The line is broken into words in the same fashion -that Bash does, so that several English (or Unix) words -surrounded by quotes are considered as one word. -History expansions are introduced by the appearance of the -history expansion character, which is <SAMP>`!'</SAMP> by default. - -</P> - - - -<H3><A NAME="SEC3" HREF="history_toc.html#TOC3">Event Designators</A></H3> -<P> -<A NAME="IDX2"></A> - -</P> -<P> -An event designator is a reference to a command line entry in the -history list. -<A NAME="IDX3"></A> - -</P> -<DL COMPACT> - -<DT><CODE>!</CODE> -<DD> -Start a history substitution, except when followed by a space, tab, -the end of the line, <KBD>=</KBD> or <KBD>(</KBD>. - -<DT><CODE>!<VAR>n</VAR></CODE> -<DD> -Refer to command line <VAR>n</VAR>. - -<DT><CODE>!-<VAR>n</VAR></CODE> -<DD> -Refer to the command <VAR>n</VAR> lines back. - -<DT><CODE>!!</CODE> -<DD> -Refer to the previous command. This is a synonym for <SAMP>`!-1'</SAMP>. - -<DT><CODE>!<VAR>string</VAR></CODE> -<DD> -Refer to the most recent command starting with <VAR>string</VAR>. - -<DT><CODE>!?<VAR>string</VAR>[?]</CODE> -<DD> -Refer to the most recent command containing <VAR>string</VAR>. The trailing -<SAMP>`?'</SAMP> may be omitted if the <VAR>string</VAR> is followed immediately by -a newline. - -<DT><CODE>^<VAR>string1</VAR>^<VAR>string2</VAR>^</CODE> -<DD> -Quick Substitution. Repeat the last command, replacing <VAR>string1</VAR> -with <VAR>string2</VAR>. Equivalent to -<CODE>!!:s/<VAR>string1</VAR>/<VAR>string2</VAR>/</CODE>. - -<DT><CODE>!#</CODE> -<DD> -The entire command line typed so far. - -</DL> - - - -<H3><A NAME="SEC4" HREF="history_toc.html#TOC4">Word Designators</A></H3> - -<P> -Word designators are used to select desired words from the event. -A <SAMP>`:'</SAMP> separates the event specification from the word designator. It -can be omitted if the word designator begins with a <SAMP>`^'</SAMP>, <SAMP>`$'</SAMP>, -<SAMP>`*'</SAMP>, <SAMP>`-'</SAMP>, or <SAMP>`%'</SAMP>. Words are numbered from the beginning -of the line, with the first word being denoted by 0 (zero). Words are -inserted into the current line separated by single spaces. - -</P> -<DL COMPACT> - -<DT><CODE>0 (zero)</CODE> -<DD> -The <CODE>0</CODE>th word. For many applications, this is the command word. - -<DT><CODE><VAR>n</VAR></CODE> -<DD> -The <VAR>n</VAR>th word. - -<DT><CODE>^</CODE> -<DD> -The first argument; that is, word 1. - -<DT><CODE>$</CODE> -<DD> -The last argument. - -<DT><CODE>%</CODE> -<DD> -The word matched by the most recent <SAMP>`?<VAR>string</VAR>?'</SAMP> search. - -<DT><CODE><VAR>x</VAR>-<VAR>y</VAR></CODE> -<DD> -A range of words; <SAMP>`-<VAR>y</VAR>'</SAMP> abbreviates <SAMP>`0-<VAR>y</VAR>'</SAMP>. - -<DT><CODE>*</CODE> -<DD> -All of the words, except the <CODE>0</CODE>th. This is a synonym for <SAMP>`1-$'</SAMP>. -It is not an error to use <SAMP>`*'</SAMP> if there is just one word in the event; -the empty string is returned in that case. - -<DT><CODE><VAR>x</VAR>*</CODE> -<DD> -Abbreviates <SAMP>`<VAR>x</VAR>-$'</SAMP> - -<DT><CODE><VAR>x</VAR>-</CODE> -<DD> -Abbreviates <SAMP>`<VAR>x</VAR>-$'</SAMP> like <SAMP>`<VAR>x</VAR>*'</SAMP>, but omits the last word. - -</DL> - -<P> -If a word designator is supplied without an event specification, the -previous command is used as the event. - -</P> - - -<H3><A NAME="SEC5" HREF="history_toc.html#TOC5">Modifiers</A></H3> - -<P> -After the optional word designator, you can add a sequence of one or more -of the following modifiers, each preceded by a <SAMP>`:'</SAMP>. - -</P> -<DL COMPACT> - -<DT><CODE>h</CODE> -<DD> -Remove a trailing pathname component, leaving only the head. - -<DT><CODE>t</CODE> -<DD> -Remove all leading pathname components, leaving the tail. - -<DT><CODE>r</CODE> -<DD> -Remove a trailing suffix of the form <SAMP>`.<VAR>suffix</VAR>'</SAMP>, leaving -the basename. - -<DT><CODE>e</CODE> -<DD> -Remove all but the trailing suffix. - -<DT><CODE>p</CODE> -<DD> -Print the new command but do not execute it. - -<DT><CODE>s/<VAR>old</VAR>/<VAR>new</VAR>/</CODE> -<DD> -Substitute <VAR>new</VAR> for the first occurrence of <VAR>old</VAR> in the -event line. Any delimiter may be used in place of <SAMP>`/'</SAMP>. -The delimiter may be quoted in <VAR>old</VAR> and <VAR>new</VAR> -with a single backslash. If <SAMP>`&'</SAMP> appears in <VAR>new</VAR>, -it is replaced by <VAR>old</VAR>. A single backslash will quote -the <SAMP>`&'</SAMP>. The final delimiter is optional if it is the last -character on the input line. - -<DT><CODE>&</CODE> -<DD> -Repeat the previous substitution. - -<DT><CODE>g</CODE> -<DD> -Cause changes to be applied over the entire event line. Used in -conjunction with <SAMP>`s'</SAMP>, as in <CODE>gs/<VAR>old</VAR>/<VAR>new</VAR>/</CODE>, -or with <SAMP>`&'</SAMP>. - -</DL> - - - -<H1><A NAME="SEC6" HREF="history_toc.html#TOC6">Programming with GNU History</A></H1> - -<P> -This chapter describes how to interface programs that you write -with the GNU History Library. -It should be considered a technical guide. -For information on the interactive use of GNU History, see section <A HREF="history.html#SEC1">Using History Interactively</A>. - -</P> - - - -<H2><A NAME="SEC7" HREF="history_toc.html#TOC7">Introduction to History</A></H2> - -<P> -Many programs read input from the user a line at a time. The GNU History -library is able to keep track of those lines, associate arbitrary data with -each line, and utilize information from previous lines in composing new -ones. - -</P> -<P> -The programmer using the History library has available functions -for remembering lines on a history list, associating arbitrary data -with a line, removing lines from the list, searching through the list -for a line containing an arbitrary text string, and referencing any line -in the list directly. In addition, a history <STRONG>expansion</STRONG> function -is available which provides for a consistent user interface across -different programs. - -</P> -<P> -The user using programs written with the History library has the -benefit of a consistent user interface with a set of well-known -commands for manipulating the text of previous lines and using that text -in new commands. The basic history manipulation commands are similar to -the history substitution provided by <CODE>csh</CODE>. - -</P> -<P> -If the programmer desires, he can use the Readline library, which -includes some history manipulation by default, and has the added -advantage of command line editing. - -</P> - - -<H2><A NAME="SEC8" HREF="history_toc.html#TOC8">History Storage</A></H2> - -<P> -The history list is an array of history entries. A history entry is -declared as follows: - -</P> - -<PRE> -typedef struct _hist_entry { - char *line; - char *data; -} HIST_ENTRY; -</PRE> - -<P> -The history list itself might therefore be declared as - -</P> - -<PRE> -HIST_ENTRY **the_history_list; -</PRE> - -<P> -The state of the History library is encapsulated into a single structure: - -</P> - -<PRE> -/* A structure used to pass the current state of the history stuff around. */ -typedef struct _hist_state { - HIST_ENTRY **entries; /* Pointer to the entries themselves. */ - int offset; /* The location pointer within this array. */ - int length; /* Number of elements within this array. */ - int size; /* Number of slots allocated to this array. */ - int flags; -} HISTORY_STATE; -</PRE> - -<P> -If the flags member includes <CODE>HS_STIFLED</CODE>, the history has been -stifled. - -</P> - - -<H2><A NAME="SEC9" HREF="history_toc.html#TOC9">History Functions</A></H2> - -<P> -This section describes the calling sequence for the various functions -present in GNU History. - -</P> - - - -<H3><A NAME="SEC10" HREF="history_toc.html#TOC10">Initializing History and State Management</A></H3> - -<P> -This section describes functions used to initialize and manage -the state of the History library when you want to use the history -functions in your program. - -</P> -<P> -<DL> -<DT><U>Function:</U> void <B>using_history</B> <I>()</I> -<DD><A NAME="IDX4"></A> -Begin a session in which the history functions might be used. This -initializes the interactive variables. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> HISTORY_STATE * <B>history_get_history_state</B> <I>()</I> -<DD><A NAME="IDX5"></A> -Return a structure describing the current state of the input history. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> void <B>history_set_history_state</B> <I>(HISTORY_STATE *state)</I> -<DD><A NAME="IDX6"></A> -Set the state of the history list according to <VAR>state</VAR>. -</DL> - -</P> - - -<H3><A NAME="SEC11" HREF="history_toc.html#TOC11">History List Management</A></H3> - -<P> -These functions manage individual entries on the history list, or set -parameters managing the list itself. - -</P> -<P> -<DL> -<DT><U>Function:</U> void <B>add_history</B> <I>(char *string)</I> -<DD><A NAME="IDX7"></A> -Place <VAR>string</VAR> at the end of the history list. The associated data -field (if any) is set to <CODE>NULL</CODE>. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> HIST_ENTRY * <B>remove_history</B> <I>(int which)</I> -<DD><A NAME="IDX8"></A> -Remove history entry at offset <VAR>which</VAR> from the history. The -removed element is returned so you can free the line, data, -and containing structure. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> HIST_ENTRY * <B>replace_history_entry</B> <I>(int which, char *line, char *data)</I> -<DD><A NAME="IDX9"></A> -Make the history entry at offset <VAR>which</VAR> have <VAR>line</VAR> and <VAR>data</VAR>. -This returns the old entry so you can dispose of the data. In the case -of an invalid <VAR>which</VAR>, a <CODE>NULL</CODE> pointer is returned. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> void <B>clear_history</B> <I>()</I> -<DD><A NAME="IDX10"></A> -Clear the history list by deleting all the entries. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> void <B>stifle_history</B> <I>(int max)</I> -<DD><A NAME="IDX11"></A> -Stifle the history list, remembering only the last <VAR>max</VAR> entries. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>unstifle_history</B> <I>()</I> -<DD><A NAME="IDX12"></A> -Stop stifling the history. This returns the previous amount the -history was stifled. The value is positive if the history was -stifled, negative if it wasn't. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>history_is_stifled</B> <I>()</I> -<DD><A NAME="IDX13"></A> -Returns non-zero if the history is stifled, zero if it is not. -</DL> - -</P> - - -<H3><A NAME="SEC12" HREF="history_toc.html#TOC12">Information About the History List</A></H3> - -<P> -These functions return information about the entire history list or -individual list entries. - -</P> -<P> -<DL> -<DT><U>Function:</U> HIST_ENTRY ** <B>history_list</B> <I>()</I> -<DD><A NAME="IDX14"></A> -Return a <CODE>NULL</CODE> terminated array of <CODE>HIST_ENTRY</CODE> which is the -current input history. Element 0 of this list is the beginning of time. -If there is no history, return <CODE>NULL</CODE>. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>where_history</B> <I>()</I> -<DD><A NAME="IDX15"></A> -Returns the offset of the current history element. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> HIST_ENTRY * <B>current_history</B> <I>()</I> -<DD><A NAME="IDX16"></A> -Return the history entry at the current position, as determined by -<CODE>where_history ()</CODE>. If there is no entry there, return a <CODE>NULL</CODE> -pointer. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> HIST_ENTRY * <B>history_get</B> <I>(int offset)</I> -<DD><A NAME="IDX17"></A> -Return the history entry at position <VAR>offset</VAR>, starting from -<CODE>history_base</CODE>. If there is no entry there, or if <VAR>offset</VAR> -is greater than the history length, return a <CODE>NULL</CODE> pointer. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>history_total_bytes</B> <I>()</I> -<DD><A NAME="IDX18"></A> -Return the number of bytes that the primary history entries are using. -This function returns the sum of the lengths of all the lines in the -history. -</DL> - -</P> - - -<H3><A NAME="SEC13" HREF="history_toc.html#TOC13">Moving Around the History List</A></H3> - -<P> -These functions allow the current index into the history list to be -set or changed. - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>history_set_pos</B> <I>(int pos)</I> -<DD><A NAME="IDX19"></A> -Set the position in the history list to <VAR>pos</VAR>, an absolute index -into the list. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> HIST_ENTRY * <B>previous_history</B> <I>()</I> -<DD><A NAME="IDX20"></A> -Back up the current history offset to the previous history entry, and -return a pointer to that entry. If there is no previous entry, return -a <CODE>NULL</CODE> pointer. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> HIST_ENTRY * <B>next_history</B> <I>()</I> -<DD><A NAME="IDX21"></A> -Move the current history offset forward to the next history entry, and -return the a pointer to that entry. If there is no next entry, return -a <CODE>NULL</CODE> pointer. -</DL> - -</P> - - -<H3><A NAME="SEC14" HREF="history_toc.html#TOC14">Searching the History List</A></H3> -<P> -<A NAME="IDX22"></A> - -</P> -<P> -These functions allow searching of the history list for entries containing -a specific string. Searching may be performed both forward and backward -from the current history position. The search may be <STRONG>anchored</STRONG>, -meaning that the string must match at the beginning of the history entry. -<A NAME="IDX23"></A> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>history_search</B> <I>(char *string, int direction)</I> -<DD><A NAME="IDX24"></A> -Search the history for <VAR>string</VAR>, starting at the current history -offset. If <VAR>direction</VAR> < 0, then the search is through previous entries, -else through subsequent. If <VAR>string</VAR> is found, then -the current history index is set to that history entry, and the value -returned is the offset in the line of the entry where -<VAR>string</VAR> was found. Otherwise, nothing is changed, and a -1 is -returned. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>history_search_prefix</B> <I>(char *string, int direction)</I> -<DD><A NAME="IDX25"></A> -Search the history for <VAR>string</VAR>, starting at the current history -offset. The search is anchored: matching lines must begin with -<VAR>string</VAR>. If <VAR>direction</VAR> < 0, then the search is through previous -entries, else through subsequent. If <VAR>string</VAR> is found, then the -current history index is set to that entry, and the return value is 0. -Otherwise, nothing is changed, and a -1 is returned. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>history_search_pos</B> <I>(char *string, int direction, int pos)</I> -<DD><A NAME="IDX26"></A> -Search for <VAR>string</VAR> in the history list, starting at <VAR>pos</VAR>, an -absolute index into the list. If <VAR>direction</VAR> is negative, the search -proceeds backward from <VAR>pos</VAR>, otherwise forward. Returns the absolute -index of the history element where <VAR>string</VAR> was found, or -1 otherwise. -</DL> - -</P> - - -<H3><A NAME="SEC15" HREF="history_toc.html#TOC15">Managing the History File</A></H3> - -<P> -The History library can read the history from and write it to a file. -This section documents the functions for managing a history file. - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>read_history</B> <I>(char *filename)</I> -<DD><A NAME="IDX27"></A> -Add the contents of <VAR>filename</VAR> to the history list, a line at a -time. If <VAR>filename</VAR> is <CODE>NULL</CODE>, then read from -<TT>`~/.history'</TT>. Returns 0 if successful, or errno if not. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>read_history_range</B> <I>(char *filename, int from, int to)</I> -<DD><A NAME="IDX28"></A> -Read a range of lines from <VAR>filename</VAR>, adding them to the history list. -Start reading at line <VAR>from</VAR> and end at <VAR>to</VAR>. If -<VAR>from</VAR> is zero, start at the beginning. If <VAR>to</VAR> is less than -<VAR>from</VAR>, then read until the end of the file. If <VAR>filename</VAR> is -<CODE>NULL</CODE>, then read from <TT>`~/.history'</TT>. Returns 0 if successful, -or <CODE>errno</CODE> if not. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>write_history</B> <I>(char *filename)</I> -<DD><A NAME="IDX29"></A> -Write the current history to <VAR>filename</VAR>, overwriting <VAR>filename</VAR> -if necessary. If <VAR>filename</VAR> is -<CODE>NULL</CODE>, then write the history list to <TT>`~/.history'</TT>. Values -returned are as in <CODE>read_history ()</CODE>. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>append_history</B> <I>(int nelements, char *filename)</I> -<DD><A NAME="IDX30"></A> -Append the last <VAR>nelements</VAR> of the history list to <VAR>filename</VAR>. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>history_truncate_file</B> <I>(char *filename, int nlines)</I> -<DD><A NAME="IDX31"></A> -Truncate the history file <VAR>filename</VAR>, leaving only the last -<VAR>nlines</VAR> lines. -</DL> - -</P> - - -<H3><A NAME="SEC16" HREF="history_toc.html#TOC16">History Expansion</A></H3> - -<P> -These functions implement <CODE>csh</CODE>-like history expansion. - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>history_expand</B> <I>(char *string, char **output)</I> -<DD><A NAME="IDX32"></A> -Expand <VAR>string</VAR>, placing the result into <VAR>output</VAR>, a pointer -to a string (see section <A HREF="history.html#SEC2">Interactive History Expansion</A>). Returns: -<DL COMPACT> - -<DT><CODE>0</CODE> -<DD> -If no expansions took place (or, if the only change in -the text was the de-slashifying of the history expansion -character); -<DT><CODE>1</CODE> -<DD> -if expansions did take place; -<DT><CODE>-1</CODE> -<DD> -if there was an error in expansion; -<DT><CODE>2</CODE> -<DD> -if the returned line should only be displayed, but not executed, -as with the <CODE>:p</CODE> modifier (see section <A HREF="history.html#SEC5">Modifiers</A>). -</DL> - -<P> -If an error ocurred in expansion, then <VAR>output</VAR> contains a descriptive -error message. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> char * <B>history_arg_extract</B> <I>(int first, int last, char *string)</I> -<DD><A NAME="IDX33"></A> -Extract a string segment consisting of the <VAR>first</VAR> through <VAR>last</VAR> -arguments present in <VAR>string</VAR>. Arguments are broken up as in Bash. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> char * <B>get_history_event</B> <I>(char *string, int *cindex, int qchar)</I> -<DD><A NAME="IDX34"></A> -Returns the text of the history event beginning at <VAR>string</VAR> + -<VAR>*cindex</VAR>. <VAR>*cindex</VAR> is modified to point to after the event -specifier. At function entry, <VAR>cindex</VAR> points to the index into -<VAR>string</VAR> where the history event specification begins. <VAR>qchar</VAR> -is a character that is allowed to end the event specification in addition -to the "normal" terminating characters. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> char ** <B>history_tokenize</B> <I>(char *string)</I> -<DD><A NAME="IDX35"></A> -Return an array of tokens parsed out of <VAR>string</VAR>, much as the -shell might. The tokens are split on white space and on the -characters <CODE>()<>;&|$</CODE>, and shell quoting conventions are -obeyed. -</DL> - -</P> - - -<H2><A NAME="SEC17" HREF="history_toc.html#TOC17">History Variables</A></H2> - -<P> -This section describes the externally visible variables exported by -the GNU History Library. - -</P> -<P> -<DL> -<DT><U>Variable:</U> int <B>history_base</B> -<DD><A NAME="IDX36"></A> -The logical offset of the first entry in the history list. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> int <B>history_length</B> -<DD><A NAME="IDX37"></A> -The number of entries currently stored in the history list. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> int <B>max_input_history</B> -<DD><A NAME="IDX38"></A> -The maximum number of history entries. This must be changed using -<CODE>stifle_history ()</CODE>. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> char <B>history_expansion_char</B> -<DD><A NAME="IDX39"></A> -The character that starts a history event. The default is <SAMP>`!'</SAMP>. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> char <B>history_subst_char</B> -<DD><A NAME="IDX40"></A> -The character that invokes word substitution if found at the start of -a line. The default is <SAMP>`^'</SAMP>. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> char <B>history_comment_char</B> -<DD><A NAME="IDX41"></A> -During tokenization, if this character is seen as the first character -of a word, then it and all subsequent characters up to a newline are -ignored, suppressing history expansion for the remainder of the line. -This is disabled by default. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> char * <B>history_no_expand_chars</B> -<DD><A NAME="IDX42"></A> -The list of characters which inhibit history expansion if found immediately -following <VAR>history_expansion_char</VAR>. The default is whitespace and -<SAMP>`='</SAMP>. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> char * <B>history_search_delimiter_chars</B> -<DD><A NAME="IDX43"></A> -The list of additional characters which can delimit a history search -string, in addition to whitespace, <SAMP>`:'</SAMP> and <SAMP>`?'</SAMP> in the case of -a substring search. The default is empty. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> int <B>history_quotes_inhibit_expansion</B> -<DD><A NAME="IDX44"></A> -If non-zero, single-quoted words are not scanned for the history expansion -character. The default value is 0. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> Function * <B>history_inhibit_expansion_function</B> -<DD><A NAME="IDX45"></A> -This should be set to the address of a function that takes two arguments: -a <CODE>char *</CODE> (<VAR>string</VAR>) and an integer index into that string (<VAR>i</VAR>). -It should return a non-zero value if the history expansion starting at -<VAR>string[i]</VAR> should not be performed; zero if the expansion should -be done. -It is intended for use by applications like Bash that use the history -expansion character for additional purposes. -By default, this variable is set to NULL. -</DL> - -</P> - - -<H2><A NAME="SEC18" HREF="history_toc.html#TOC18">History Programming Example</A></H2> - -<P> -The following program demonstrates simple use of the GNU History Library. - -</P> - -<PRE> -main () -{ - char line[1024], *t; - int len, done = 0; - - line[0] = 0; - - using_history (); - while (!done) - { - printf ("history$ "); - fflush (stdout); - t = fgets (line, sizeof (line) - 1, stdin); - if (t && *t) - { - len = strlen (t); - if (t[len - 1] == '\n') - t[len - 1] = '\0'; - } - - if (!t) - strcpy (line, "quit"); - - if (line[0]) - { - char *expansion; - int result; - - result = history_expand (line, &expansion); - if (result) - fprintf (stderr, "%s\n", expansion); - - if (result < 0 || result == 2) - { - free (expansion); - continue; - } - - add_history (expansion); - strncpy (line, expansion, sizeof (line) - 1); - free (expansion); - } - - if (strcmp (line, "quit") == 0) - done = 1; - else if (strcmp (line, "save") == 0) - write_history ("history_file"); - else if (strcmp (line, "read") == 0) - read_history ("history_file"); - else if (strcmp (line, "list") == 0) - { - register HIST_ENTRY **the_list; - register int i; - - the_list = history_list (); - if (the_list) - for (i = 0; the_list[i]; i++) - printf ("%d: %s\n", i + history_base, the_list[i]->line); - } - else if (strncmp (line, "delete", 6) == 0) - { - int which; - if ((sscanf (line + 6, "%d", &which)) == 1) - { - HIST_ENTRY *entry = remove_history (which); - if (!entry) - fprintf (stderr, "No such entry %d\n", which); - else - { - free (entry->line); - free (entry); - } - } - else - { - fprintf (stderr, "non-numeric arg given to `delete'\n"); - } - } - } -} -</PRE> - - - -<H1><A NAME="SEC19" HREF="history_toc.html#TOC19">Concept Index</A></H1> -<P> -<H2>a</H2> -<DIR> -<LI><A HREF="history.html#IDX23">anchored search</A> -</DIR> -<H2>e</H2> -<DIR> -<LI><A HREF="history.html#IDX2">event designators</A> -</DIR> -<H2>h</H2> -<DIR> -<LI><A HREF="history.html#IDX3">history events</A> -<LI><A HREF="history.html#IDX1">history expansion</A> -<LI><A HREF="history.html#IDX22">History Searching</A> -</DIR> - -</P> - - -<H1><A NAME="SEC20" HREF="history_toc.html#TOC20">Function and Variable Index</A></H1> -<P> -<H2>a</H2> -<DIR> -<LI><A HREF="history.html#IDX7">add_history</A> -<LI><A HREF="history.html#IDX30">append_history</A> -</DIR> -<H2>c</H2> -<DIR> -<LI><A HREF="history.html#IDX10">clear_history</A> -<LI><A HREF="history.html#IDX16">current_history</A> -</DIR> -<H2>g</H2> -<DIR> -<LI><A HREF="history.html#IDX34">get_history_event</A> -</DIR> -<H2>h</H2> -<DIR> -<LI><A HREF="history.html#IDX33">history_arg_extract</A> -<LI><A HREF="history.html#IDX36">history_base</A> -<LI><A HREF="history.html#IDX41">history_comment_char</A> -<LI><A HREF="history.html#IDX32">history_expand</A> -<LI><A HREF="history.html#IDX39">history_expansion_char</A> -<LI><A HREF="history.html#IDX17">history_get</A> -<LI><A HREF="history.html#IDX5">history_get_history_state</A> -<LI><A HREF="history.html#IDX45">history_inhibit_expansion_function</A> -<LI><A HREF="history.html#IDX13">history_is_stifled</A> -<LI><A HREF="history.html#IDX37">history_length</A> -<LI><A HREF="history.html#IDX14">history_list</A> -<LI><A HREF="history.html#IDX42">history_no_expand_chars</A> -<LI><A HREF="history.html#IDX44">history_quotes_inhibit_expansion</A> -<LI><A HREF="history.html#IDX24">history_search</A> -<LI><A HREF="history.html#IDX43">history_search_delimiter_chars</A> -<LI><A HREF="history.html#IDX26">history_search_pos</A> -<LI><A HREF="history.html#IDX25">history_search_prefix</A> -<LI><A HREF="history.html#IDX6">history_set_history_state</A> -<LI><A HREF="history.html#IDX19">history_set_pos</A> -<LI><A HREF="history.html#IDX40">history_subst_char</A> -<LI><A HREF="history.html#IDX35">history_tokenize</A> -<LI><A HREF="history.html#IDX18">history_total_bytes</A> -<LI><A HREF="history.html#IDX31">history_truncate_file</A> -</DIR> -<H2>m</H2> -<DIR> -<LI><A HREF="history.html#IDX38">max_input_history</A> -</DIR> -<H2>n</H2> -<DIR> -<LI><A HREF="history.html#IDX21">next_history</A> -</DIR> -<H2>p</H2> -<DIR> -<LI><A HREF="history.html#IDX20">previous_history</A> -</DIR> -<H2>r</H2> -<DIR> -<LI><A HREF="history.html#IDX27">read_history</A> -<LI><A HREF="history.html#IDX28">read_history_range</A> -<LI><A HREF="history.html#IDX8">remove_history</A> -<LI><A HREF="history.html#IDX9">replace_history_entry</A> -</DIR> -<H2>s</H2> -<DIR> -<LI><A HREF="history.html#IDX11">stifle_history</A> -</DIR> -<H2>u</H2> -<DIR> -<LI><A HREF="history.html#IDX12">unstifle_history</A> -<LI><A HREF="history.html#IDX4">using_history</A> -</DIR> -<H2>w</H2> -<DIR> -<LI><A HREF="history.html#IDX15">where_history</A> -<LI><A HREF="history.html#IDX29">write_history</A> -</DIR> - -</P> -<P><HR><P> -This document was generated on 16 April 1997 using the -<A HREF="http://wwwcn.cern.ch/dci/texi2html/">texi2html</A> -translator version 1.51.</P> -</BODY> -</HTML>
--- a/readline/doc/history.info Fri Jun 06 22:08:11 1997 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,785 +0,0 @@ -This is Info file history.info, produced by Makeinfo-1.55 from the -input file /usr/homes/chet/src/bash/readline-src/doc/hist.texinfo. - - This document describes the GNU History library, a programming tool -that provides a consistent user interface for recalling lines of -previously typed input. - - Copyright (C) 1988, 1991, 1993, 1995, 1996 Free Software Foundation, -Inc. - - Permission is granted to make and distribute verbatim copies of this -manual provided the copyright notice and this permission notice pare -preserved on all copies. - - Permission is granted to copy and distribute modified versions of -this manual under the conditions for verbatim copying, provided that -the entire resulting derived work is distributed under the terms of a -permission notice identical to this one. - - Permission is granted to copy and distribute translations of this -manual into another language, under the above conditions for modified -versions, except that this permission notice may be stated in a -translation approved by the Foundation. - - -File: history.info, Node: Top, Next: Using History Interactively, Prev: (DIR), Up: (DIR) - -GNU History Library -******************* - - This document describes the GNU History library, a programming tool -that provides a consistent user interface for recalling lines of -previously typed input. - -* Menu: - -* Using History Interactively:: GNU History User's Manual. -* Programming with GNU History:: GNU History Programmer's Manual. -* Concept Index:: Index of concepts described in this manual. -* Function and Variable Index:: Index of externally visible functions - and variables. - - -File: history.info, Node: Using History Interactively, Next: Programming with GNU History, Prev: Top, Up: Top - -Using History Interactively -*************************** - - This chapter describes how to use the GNU History Library -interactively, from a user's standpoint. It should be considered a -user's guide. For information on using the GNU History Library in your -own programs, *note Programming with GNU History::.. - -* Menu: - -* History Interaction:: What it feels like using History as a user. - - -File: history.info, Node: History Interaction, Up: Using History Interactively - -Interactive History Expansion -============================= - - The History library provides a history expansion feature that is -similar to the history expansion provided by `csh'. This section -describes the syntax used to manipulate the history information. - - History expansions introduce words from the history list into the -input stream, making it easy to repeat commands, insert the arguments -to a previous command into the current input line, or fix errors in -previous commands quickly. - - History expansion takes place in two parts. The first is to -determine which line from the previous history should be used during -substitution. The second is to select portions of that line for -inclusion into the current one. The line selected from the previous -history is called the "event", and the portions of that line that are -acted upon are called "words". Various "modifiers" are available to -manipulate the selected words. The line is broken into words in the -same fashion that Bash does, so that several English (or Unix) words -surrounded by quotes are considered as one word. History expansions -are introduced by the appearance of the history expansion character, -which is `!' by default. - -* Menu: - -* Event Designators:: How to specify which history line to use. -* Word Designators:: Specifying which words are of interest. -* Modifiers:: Modifying the results of substitution. - - -File: history.info, Node: Event Designators, Next: Word Designators, Up: History Interaction - -Event Designators ------------------ - - An event designator is a reference to a command line entry in the -history list. - -`!' - Start a history substitution, except when followed by a space, tab, - the end of the line, = or (. - -`!N' - Refer to command line N. - -`!-N' - Refer to the command N lines back. - -`!!' - Refer to the previous command. This is a synonym for `!-1'. - -`!STRING' - Refer to the most recent command starting with STRING. - -`!?STRING[?]' - Refer to the most recent command containing STRING. The trailing - `?' may be omitted if the STRING is followed immediately by a - newline. - -`^STRING1^STRING2^' - Quick Substitution. Repeat the last command, replacing STRING1 - with STRING2. Equivalent to `!!:s/STRING1/STRING2/'. - -`!#' - The entire command line typed so far. - - -File: history.info, Node: Word Designators, Next: Modifiers, Prev: Event Designators, Up: History Interaction - -Word Designators ----------------- - - Word designators are used to select desired words from the event. A -`:' separates the event specification from the word designator. It can -be omitted if the word designator begins with a `^', `$', `*', `-', or -`%'. Words are numbered from the beginning of the line, with the first -word being denoted by 0 (zero). Words are inserted into the current -line separated by single spaces. - -`0 (zero)' - The `0'th word. For many applications, this is the command word. - -`N' - The Nth word. - -`^' - The first argument; that is, word 1. - -`$' - The last argument. - -`%' - The word matched by the most recent `?STRING?' search. - -`X-Y' - A range of words; `-Y' abbreviates `0-Y'. - -`*' - All of the words, except the `0'th. This is a synonym for `1-$'. - It is not an error to use `*' if there is just one word in the - event; the empty string is returned in that case. - -`X*' - Abbreviates `X-$' - -`X-' - Abbreviates `X-$' like `X*', but omits the last word. - - If a word designator is supplied without an event specification, the -previous command is used as the event. - - -File: history.info, Node: Modifiers, Prev: Word Designators, Up: History Interaction - -Modifiers ---------- - - After the optional word designator, you can add a sequence of one or -more of the following modifiers, each preceded by a `:'. - -`h' - Remove a trailing pathname component, leaving only the head. - -`t' - Remove all leading pathname components, leaving the tail. - -`r' - Remove a trailing suffix of the form `.SUFFIX', leaving the - basename. - -`e' - Remove all but the trailing suffix. - -`p' - Print the new command but do not execute it. - -`s/OLD/NEW/' - Substitute NEW for the first occurrence of OLD in the event line. - Any delimiter may be used in place of `/'. The delimiter may be - quoted in OLD and NEW with a single backslash. If `&' appears in - NEW, it is replaced by OLD. A single backslash will quote the - `&'. The final delimiter is optional if it is the last character - on the input line. - -`&' - Repeat the previous substitution. - -`g' - Cause changes to be applied over the entire event line. Used in - conjunction with `s', as in `gs/OLD/NEW/', or with `&'. - - -File: history.info, Node: Programming with GNU History, Next: Concept Index, Prev: Using History Interactively, Up: Top - -Programming with GNU History -**************************** - - This chapter describes how to interface programs that you write with -the GNU History Library. It should be considered a technical guide. -For information on the interactive use of GNU History, *note Using -History Interactively::.. - -* Menu: - -* Introduction to History:: What is the GNU History library for? -* History Storage:: How information is stored. -* History Functions:: Functions that you can use. -* History Variables:: Variables that control behaviour. -* History Programming Example:: Example of using the GNU History Library. - - -File: history.info, Node: Introduction to History, Next: History Storage, Up: Programming with GNU History - -Introduction to History -======================= - - Many programs read input from the user a line at a time. The GNU -History library is able to keep track of those lines, associate -arbitrary data with each line, and utilize information from previous -lines in composing new ones. - - The programmer using the History library has available functions for -remembering lines on a history list, associating arbitrary data with a -line, removing lines from the list, searching through the list for a -line containing an arbitrary text string, and referencing any line in -the list directly. In addition, a history "expansion" function is -available which provides for a consistent user interface across -different programs. - - The user using programs written with the History library has the -benefit of a consistent user interface with a set of well-known -commands for manipulating the text of previous lines and using that text -in new commands. The basic history manipulation commands are similar to -the history substitution provided by `csh'. - - If the programmer desires, he can use the Readline library, which -includes some history manipulation by default, and has the added -advantage of command line editing. - - -File: history.info, Node: History Storage, Next: History Functions, Prev: Introduction to History, Up: Programming with GNU History - -History Storage -=============== - - The history list is an array of history entries. A history entry is -declared as follows: - - typedef struct _hist_entry { - char *line; - char *data; - } HIST_ENTRY; - - The history list itself might therefore be declared as - - HIST_ENTRY **the_history_list; - - The state of the History library is encapsulated into a single -structure: - - /* A structure used to pass the current state of the history stuff around. */ - typedef struct _hist_state { - HIST_ENTRY **entries; /* Pointer to the entries themselves. */ - int offset; /* The location pointer within this array. */ - int length; /* Number of elements within this array. */ - int size; /* Number of slots allocated to this array. */ - int flags; - } HISTORY_STATE; - - If the flags member includes `HS_STIFLED', the history has been -stifled. - - -File: history.info, Node: History Functions, Next: History Variables, Prev: History Storage, Up: Programming with GNU History - -History Functions -================= - - This section describes the calling sequence for the various functions -present in GNU History. - -* Menu: - -* Initializing History and State Management:: Functions to call when you - want to use history in a - program. -* History List Management:: Functions used to manage the list - of history entries. -* Information About the History List:: Functions returning information about - the history list. -* Moving Around the History List:: Functions used to change the position - in the history list. -* Searching the History List:: Functions to search the history list - for entries containing a string. -* Managing the History File:: Functions that read and write a file - containing the history list. -* History Expansion:: Functions to perform csh-like history - expansion. - - -File: history.info, Node: Initializing History and State Management, Next: History List Management, Up: History Functions - -Initializing History and State Management ------------------------------------------ - - This section describes functions used to initialize and manage the -state of the History library when you want to use the history functions -in your program. - - - Function: void using_history () - Begin a session in which the history functions might be used. This - initializes the interactive variables. - - - Function: HISTORY_STATE * history_get_history_state () - Return a structure describing the current state of the input - history. - - - Function: void history_set_history_state (HISTORY_STATE *state) - Set the state of the history list according to STATE. - - -File: history.info, Node: History List Management, Next: Information About the History List, Prev: Initializing History and State Management, Up: History Functions - -History List Management ------------------------ - - These functions manage individual entries on the history list, or set -parameters managing the list itself. - - - Function: void add_history (char *string) - Place STRING at the end of the history list. The associated data - field (if any) is set to `NULL'. - - - Function: HIST_ENTRY * remove_history (int which) - Remove history entry at offset WHICH from the history. The - removed element is returned so you can free the line, data, and - containing structure. - - - Function: HIST_ENTRY * replace_history_entry (int which, char *line, - char *data) - Make the history entry at offset WHICH have LINE and DATA. This - returns the old entry so you can dispose of the data. In the case - of an invalid WHICH, a `NULL' pointer is returned. - - - Function: void clear_history () - Clear the history list by deleting all the entries. - - - Function: void stifle_history (int max) - Stifle the history list, remembering only the last MAX entries. - - - Function: int unstifle_history () - Stop stifling the history. This returns the previous amount the - history was stifled. The value is positive if the history was - stifled, negative if it wasn't. - - - Function: int history_is_stifled () - Returns non-zero if the history is stifled, zero if it is not. - - -File: history.info, Node: Information About the History List, Next: Moving Around the History List, Prev: History List Management, Up: History Functions - -Information About the History List ----------------------------------- - - These functions return information about the entire history list or -individual list entries. - - - Function: HIST_ENTRY ** history_list () - Return a `NULL' terminated array of `HIST_ENTRY' which is the - current input history. Element 0 of this list is the beginning of - time. If there is no history, return `NULL'. - - - Function: int where_history () - Returns the offset of the current history element. - - - Function: HIST_ENTRY * current_history () - Return the history entry at the current position, as determined by - `where_history ()'. If there is no entry there, return a `NULL' - pointer. - - - Function: HIST_ENTRY * history_get (int offset) - Return the history entry at position OFFSET, starting from - `history_base'. If there is no entry there, or if OFFSET is - greater than the history length, return a `NULL' pointer. - - - Function: int history_total_bytes () - Return the number of bytes that the primary history entries are - using. This function returns the sum of the lengths of all the - lines in the history. - - -File: history.info, Node: Moving Around the History List, Next: Searching the History List, Prev: Information About the History List, Up: History Functions - -Moving Around the History List ------------------------------- - - These functions allow the current index into the history list to be -set or changed. - - - Function: int history_set_pos (int pos) - Set the position in the history list to POS, an absolute index - into the list. - - - Function: HIST_ENTRY * previous_history () - Back up the current history offset to the previous history entry, - and return a pointer to that entry. If there is no previous - entry, return a `NULL' pointer. - - - Function: HIST_ENTRY * next_history () - Move the current history offset forward to the next history entry, - and return the a pointer to that entry. If there is no next - entry, return a `NULL' pointer. - - -File: history.info, Node: Searching the History List, Next: Managing the History File, Prev: Moving Around the History List, Up: History Functions - -Searching the History List --------------------------- - - These functions allow searching of the history list for entries -containing a specific string. Searching may be performed both forward -and backward from the current history position. The search may be -"anchored", meaning that the string must match at the beginning of the -history entry. - - - Function: int history_search (char *string, int direction) - Search the history for STRING, starting at the current history - offset. If DIRECTION < 0, then the search is through previous - entries, else through subsequent. If STRING is found, then the - current history index is set to that history entry, and the value - returned is the offset in the line of the entry where STRING was - found. Otherwise, nothing is changed, and a -1 is returned. - - - Function: int history_search_prefix (char *string, int direction) - Search the history for STRING, starting at the current history - offset. The search is anchored: matching lines must begin with - STRING. If DIRECTION < 0, then the search is through previous - entries, else through subsequent. If STRING is found, then the - current history index is set to that entry, and the return value - is 0. Otherwise, nothing is changed, and a -1 is returned. - - - Function: int history_search_pos (char *string, int direction, int - pos) - Search for STRING in the history list, starting at POS, an - absolute index into the list. If DIRECTION is negative, the search - proceeds backward from POS, otherwise forward. Returns the - absolute index of the history element where STRING was found, or - -1 otherwise. - - -File: history.info, Node: Managing the History File, Next: History Expansion, Prev: Searching the History List, Up: History Functions - -Managing the History File -------------------------- - - The History library can read the history from and write it to a file. -This section documents the functions for managing a history file. - - - Function: int read_history (char *filename) - Add the contents of FILENAME to the history list, a line at a - time. If FILENAME is `NULL', then read from `~/.history'. - Returns 0 if successful, or errno if not. - - - Function: int read_history_range (char *filename, int from, int to) - Read a range of lines from FILENAME, adding them to the history - list. Start reading at line FROM and end at TO. If FROM is zero, - start at the beginning. If TO is less than FROM, then read until - the end of the file. If FILENAME is `NULL', then read from - `~/.history'. Returns 0 if successful, or `errno' if not. - - - Function: int write_history (char *filename) - Write the current history to FILENAME, overwriting FILENAME if - necessary. If FILENAME is `NULL', then write the history list to - `~/.history'. Values returned are as in `read_history ()'. - - - Function: int append_history (int nelements, char *filename) - Append the last NELEMENTS of the history list to FILENAME. - - - Function: int history_truncate_file (char *filename, int nlines) - Truncate the history file FILENAME, leaving only the last NLINES - lines. - - -File: history.info, Node: History Expansion, Prev: Managing the History File, Up: History Functions - -History Expansion ------------------ - - These functions implement `csh'-like history expansion. - - - Function: int history_expand (char *string, char **output) - Expand STRING, placing the result into OUTPUT, a pointer to a - string (*note History Interaction::.). Returns: - `0' - If no expansions took place (or, if the only change in the - text was the de-slashifying of the history expansion - character); - - `1' - if expansions did take place; - - `-1' - if there was an error in expansion; - - `2' - if the returned line should only be displayed, but not - executed, as with the `:p' modifier (*note Modifiers::.). - - If an error ocurred in expansion, then OUTPUT contains a - descriptive error message. - - - Function: char * history_arg_extract (int first, int last, char - *string) - Extract a string segment consisting of the FIRST through LAST - arguments present in STRING. Arguments are broken up as in Bash. - - - Function: char * get_history_event (char *string, int *cindex, int - qchar) - Returns the text of the history event beginning at STRING + - *CINDEX. *CINDEX is modified to point to after the event - specifier. At function entry, CINDEX points to the index into - STRING where the history event specification begins. QCHAR is a - character that is allowed to end the event specification in - addition to the "normal" terminating characters. - - - Function: char ** history_tokenize (char *string) - Return an array of tokens parsed out of STRING, much as the shell - might. The tokens are split on white space and on the characters - `()<>;&|$', and shell quoting conventions are obeyed. - - -File: history.info, Node: History Variables, Next: History Programming Example, Prev: History Functions, Up: Programming with GNU History - -History Variables -================= - - This section describes the externally visible variables exported by -the GNU History Library. - - - Variable: int history_base - The logical offset of the first entry in the history list. - - - Variable: int history_length - The number of entries currently stored in the history list. - - - Variable: int max_input_history - The maximum number of history entries. This must be changed using - `stifle_history ()'. - - - Variable: char history_expansion_char - The character that starts a history event. The default is `!'. - - - Variable: char history_subst_char - The character that invokes word substitution if found at the start - of a line. The default is `^'. - - - Variable: char history_comment_char - During tokenization, if this character is seen as the first - character of a word, then it and all subsequent characters up to a - newline are ignored, suppressing history expansion for the - remainder of the line. This is disabled by default. - - - Variable: char * history_no_expand_chars - The list of characters which inhibit history expansion if found - immediately following HISTORY_EXPANSION_CHAR. The default is - whitespace and `='. - - - Variable: char * history_search_delimiter_chars - The list of additional characters which can delimit a history - search string, in addition to whitespace, `:' and `?' in the case - of a substring search. The default is empty. - - - Variable: int history_quotes_inhibit_expansion - If non-zero, single-quoted words are not scanned for the history - expansion character. The default value is 0. - - - Variable: Function * history_inhibit_expansion_function - This should be set to the address of a function that takes two - arguments: a `char *' (STRING) and an integer index into that - string (I). It should return a non-zero value if the history - expansion starting at STRING[I] should not be performed; zero if - the expansion should be done. It is intended for use by - applications like Bash that use the history expansion character - for additional purposes. By default, this variable is set to NULL. - - -File: history.info, Node: History Programming Example, Prev: History Variables, Up: Programming with GNU History - -History Programming Example -=========================== - - The following program demonstrates simple use of the GNU History -Library. - - main () - { - char line[1024], *t; - int len, done = 0; - - line[0] = 0; - - using_history (); - while (!done) - { - printf ("history$ "); - fflush (stdout); - t = fgets (line, sizeof (line) - 1, stdin); - if (t && *t) - { - len = strlen (t); - if (t[len - 1] == '\n') - t[len - 1] = '\0'; - } - - if (!t) - strcpy (line, "quit"); - - if (line[0]) - { - char *expansion; - int result; - - result = history_expand (line, &expansion); - if (result) - fprintf (stderr, "%s\n", expansion); - - if (result < 0 || result == 2) - { - free (expansion); - continue; - } - - add_history (expansion); - strncpy (line, expansion, sizeof (line) - 1); - free (expansion); - } - - if (strcmp (line, "quit") == 0) - done = 1; - else if (strcmp (line, "save") == 0) - write_history ("history_file"); - else if (strcmp (line, "read") == 0) - read_history ("history_file"); - else if (strcmp (line, "list") == 0) - { - register HIST_ENTRY **the_list; - register int i; - - the_list = history_list (); - if (the_list) - for (i = 0; the_list[i]; i++) - printf ("%d: %s\n", i + history_base, the_list[i]->line); - } - else if (strncmp (line, "delete", 6) == 0) - { - int which; - if ((sscanf (line + 6, "%d", &which)) == 1) - { - HIST_ENTRY *entry = remove_history (which); - if (!entry) - fprintf (stderr, "No such entry %d\n", which); - else - { - free (entry->line); - free (entry); - } - } - else - { - fprintf (stderr, "non-numeric arg given to `delete'\n"); - } - } - } - } - - -File: history.info, Node: Concept Index, Next: Function and Variable Index, Prev: Programming with GNU History, Up: Top - -Concept Index -************* - -* Menu: - -* anchored search: Searching the History List. -* event designators: Event Designators. -* history events: Event Designators. -* history expansion: History Interaction. -* History Searching: Searching the History List. - - -File: history.info, Node: Function and Variable Index, Prev: Concept Index, Up: Top - -Function and Variable Index -*************************** - -* Menu: - -* add_history: History List Management. -* append_history: Managing the History File. -* clear_history: History List Management. -* current_history: Information About the History List. -* get_history_event: History Expansion. -* history_arg_extract: History Expansion. -* history_base: History Variables. -* history_comment_char: History Variables. -* history_expand: History Expansion. -* history_expansion_char: History Variables. -* history_get: Information About the History List. -* history_get_history_state: Initializing History and State Management. -* history_inhibit_expansion_function: History Variables. -* history_is_stifled: History List Management. -* history_length: History Variables. -* history_list: Information About the History List. -* history_no_expand_chars: History Variables. -* history_quotes_inhibit_expansion: History Variables. -* history_search: Searching the History List. -* history_search_delimiter_chars: History Variables. -* history_search_pos: Searching the History List. -* history_search_prefix: Searching the History List. -* history_set_history_state: Initializing History and State Management. -* history_set_pos: Moving Around the History List. -* history_subst_char: History Variables. -* history_tokenize: History Expansion. -* history_total_bytes: Information About the History List. -* history_truncate_file: Managing the History File. -* max_input_history: History Variables. -* next_history: Moving Around the History List. -* previous_history: Moving Around the History List. -* read_history: Managing the History File. -* read_history_range: Managing the History File. -* remove_history: History List Management. -* replace_history_entry: History List Management. -* stifle_history: History List Management. -* unstifle_history: History List Management. -* using_history: Initializing History and State Management. -* where_history: Information About the History List. -* write_history: Managing the History File. - - - -Tag Table: -Node: Top1035 -Node: Using History Interactively1629 -Node: History Interaction2137 -Node: Event Designators3614 -Node: Word Designators4537 -Node: Modifiers5786 -Node: Programming with GNU History6924 -Node: Introduction to History7650 -Node: History Storage8971 -Node: History Functions10064 -Node: Initializing History and State Management11035 -Node: History List Management11827 -Node: Information About the History List13348 -Node: Moving Around the History List14654 -Node: Searching the History List15539 -Node: Managing the History File17371 -Node: History Expansion18877 -Node: History Variables20721 -Node: History Programming Example23039 -Node: Concept Index25643 -Node: Function and Variable Index26124 - -End Tag Table
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-g(.)g(.)g(.)g(.)g(.)20 b Fe(9)p eop -16 17 bop 0 -58 a Fo(16)1474 b(GNU)15 b(History)g(Library)p -eop -17 18 bop 0 -58 a Fo(App)q(endix)17 b(B:)e(F)l(unction)h(and)g(V)l -(ariable)g(Index)1069 b(17)0 183 y Fk(App)r(endix)13 -b(B)41 b(F)-7 b(unction)15 b(and)g(V)-7 b(ariable)14 -b(Index)0 430 y Fm(A)0 496 y Fc(add)p 62 496 12 2 v 13 -w(history)8 b Fd(.)s(.)e(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)20 b Fe(7)0 554 y -Fc(append)p 122 554 V 12 w(history)9 b Fd(.)d(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)24 b Fe(10)0 -679 y Fm(C)0 745 y Fc(clear)p 102 745 V 12 w(history)5 -b Fd(.)t(.)h(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)18 b Fe(7)0 803 y Fc(current)p 142 803 -V 11 w(history)9 b Fd(.)d(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)24 b Fe(8)0 928 y Fm(G)0 994 y Fc(get)p -62 994 V 13 w(history)p 215 994 V 11 w(event)9 b Fd(.)d(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)23 b Fe(11)0 1119 -y Fm(H)0 1185 y Fc(history)p 142 1185 V 11 w(arg)p 213 -1185 V 13 w(extract)8 b Fd(.)t(.)e(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)21 b Fe(10)0 1243 y Fc(history)p 142 1243 V 11 w(base)e -Fd(.)6 b(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h -(.)f(.)g(.)20 b Fe(11)0 1301 y Fc(history)p 142 1301 -V 11 w(comment)p 293 1301 V 12 w(char)g Fd(.)6 b(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)h(.)21 b Fe(11)0 1359 y Fc(history)p 142 1359 -V 11 w(expand)10 b Fd(.)c(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -h(.)f(.)g(.)g(.)g(.)24 b Fe(10)0 1418 y Fc(history)p -142 1418 V 11 w(expansion)p 333 1418 V 11 w(char)17 b -Fd(.)7 b(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.) -f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)19 b Fe(11)0 1476 -y Fc(history)p 142 1476 V 11 w(get)8 b Fd(.)d(.)h(.)g(.)g(.)g(.)g(.)h -(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)20 -b Fe(8)0 1534 y Fc(history)p 142 1534 V 11 w(get)p 213 -1534 V 13 w(history)p 366 1534 V 12 w(state)t Fd(.)t(.)6 -b(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)17 b Fe(6)0 1592 y Fc(history)p -142 1592 V 11 w(inhibit)p 293 1592 V 12 w(expansion)p -484 1592 V 10 w(function)k Fd(.)6 b(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h -(.)f(.)23 b Fe(12)0 1650 y Fc(history)p 142 1650 V 11 -w(is)p 193 1650 V 14 w(stifled)7 b Fd(.)f(.)g(.)g(.)g(.)h(.)f(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)23 b Fe(7)0 1708 y Fc(history)p -142 1708 V 11 w(length)16 b Fd(.)6 b(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.) -f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)18 b Fe(11)0 1766 y Fc(history)p -142 1766 V 11 w(list)7 b Fd(.)t(.)g(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)19 b Fe(8)0 1824 -y Fc(history)p 142 1824 V 11 w(no)p 193 1824 V 14 w(expand)p -327 1824 V 12 w(chars)f Fd(.)6 b(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)20 -b Fe(12)0 1883 y Fc(history)p 142 1883 V 11 w(quotes)p -273 1883 V 12 w(inhibit)p 425 1883 V 12 w(expansion)14 -b Fd(.)6 b(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)17 -b Fe(12)0 1941 y Fc(history)p 142 1941 V 11 w(search)t -Fd(.)t(.)6 b(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)17 b Fe(9)0 1999 y Fc(history)p 142 1999 V -11 w(search)p 273 1999 V 12 w(delimiter)p 465 1999 V -11 w(chars)h Fd(.)6 b(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g -(.)g(.)g(.)g(.)20 b Fe(12)0 2057 y Fc(history)p 142 2057 -V 11 w(search)p 273 2057 V 12 w(pos)9 b Fd(.)d(.)g(.)g(.)g(.)h(.)f(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)g(.)23 b Fe(9)0 2115 y Fc(history)p -142 2115 V 11 w(search)p 273 2115 V 12 w(prefix)6 b Fd(.)t(.)g(.)g(.)h -(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)g(.)19 b Fe(9)0 2173 y Fc(history)p -142 2173 V 11 w(set)p 213 2173 V 13 w(history)p 366 2173 -V 12 w(state)t Fd(.)t(.)6 b(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)17 b Fe(6)1015 -430 y Fc(history)p 1157 430 V 12 w(set)p 1229 430 V 13 -w(pos)5 b Fd(.)g(.)h(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)19 b Fe(8)1015 488 y Fc(history)p 1157 -488 V 12 w(subst)p 1269 488 V 12 w(char)k Fd(.)6 b(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)25 b Fe(11)1015 546 y Fc(history)p -1157 546 V 12 w(tokenize)9 b Fd(.)s(.)d(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.) -f(.)g(.)g(.)g(.)g(.)22 b Fe(11)1015 604 y Fc(history)p -1157 604 V 12 w(total)p 1269 604 V 12 w(bytes)9 b Fd(.)t(.)d(.)g(.)g(.) -g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h -(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)22 b Fe(8)1015 662 -y Fc(history)p 1157 662 V 12 w(truncate)p 1329 662 V -11 w(file)5 b Fd(.)g(.)h(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.) -f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)19 -b Fe(10)1015 770 y Fm(M)1015 836 y Fc(max)p 1077 836 -V 13 w(input)p 1190 836 V 13 w(history)14 b Fd(.)6 b(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)17 b Fe(11)1015 944 -y Fm(N)1015 1011 y Fc(next)p 1097 1011 V 13 w(history)7 -b Fd(.)s(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)20 b Fe(8)1015 1119 y Fm(P)1015 1185 -y Fc(previous)p 1177 1185 V 12 w(history)7 b Fd(.)f(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)23 b Fe(8)1015 -1293 y Fm(R)1015 1359 y Fc(read)p 1097 1359 V 13 w(history)7 -b Fd(.)s(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)20 b Fe(9)1015 1418 y Fc(read)p 1097 -1418 V 13 w(history)p 1250 1418 V 11 w(range)9 b Fd(.)d(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)23 b Fe(9)1015 1476 -y Fc(remove)p 1137 1476 V 12 w(history)t Fd(.)t(.)6 b(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)17 -b Fe(7)1015 1534 y Fc(replace)p 1157 1534 V 12 w(history)p -1309 1534 V 11 w(entry)6 b Fd(.)f(.)h(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.) -f(.)19 b Fe(7)1015 1642 y Fm(S)1015 1708 y Fc(stifle)p -1137 1708 V 12 w(history)t Fd(.)t(.)6 b(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)17 b Fe(7)1015 1816 -y Fm(U)1015 1883 y Fc(unstifle)p 1177 1883 V 12 w(history)7 -b Fd(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)23 -b Fe(7)1015 1941 y Fc(using)p 1117 1941 V 13 w(history)5 -b Fd(.)s(.)h(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)h(.)f(.)g(.)18 b Fe(6)1015 2049 y Fm(W)1015 2115 y -Fc(where)p 1117 2115 V 13 w(history)5 b Fd(.)s(.)h(.)g(.)h(.)f(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)18 -b Fe(8)1015 2173 y Fc(write)p 1117 2173 V 13 w(history)t -Fd(.)s(.)6 b(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)h(.)17 b Fe(10)p eop -18 19 bop 0 -58 a Fo(18)1474 b(GNU)15 b(History)g(Library)p -eop --1 20 bop 1937 -58 a Fo(i)0 183 y Fk(T)-7 b(able)15 b(of)g(Con)n(ten)n -(ts)0 358 y Fm(1)67 b(Using)22 b(History)h(In)n(teractiv)n(ely)15 -b Fb(.)e(.)c(.)h(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)f(.)h(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)f(.)h(.)g(.)37 b Fm(1)149 435 y Fo(1.1)45 -b(In)o(teractiv)o(e)15 b(History)g(Expansion)9 b Fa(.)g(.)e(.)h(.)f(.)h -(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.) -h(.)f(.)h(.)f(.)h(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.)23 b -Fo(1)299 498 y(1.1.1)44 b(Ev)o(en)o(t)14 b(Designators)d -Fa(.)d(.)f(.)h(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f -(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.) -f(.)h(.)26 b Fo(1)299 560 y(1.1.2)44 b(W)l(ord)15 b(Designators)t -Fa(.)7 b(.)g(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.) -h(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h -(.)f(.)h(.)f(.)19 b Fo(2)299 622 y(1.1.3)44 b(Mo)q(di\014ers)15 -b Fa(.)8 b(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f -(.)h(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.) -h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)29 b Fo(2)0 -747 y Fm(2)67 b(Programming)23 b(with)g(GNU)f(History)11 -b Fb(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)f(.)h(.)g(.)g(.)g(.)g(.)g(.) -g(.)33 b Fm(5)149 825 y Fo(2.1)45 b(In)o(tro)q(duction)16 -b(to)f(History)9 b Fa(.)e(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h -(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.) -f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)24 b Fo(5)149 -887 y(2.2)45 b(History)15 b(Storage)c Fa(.)c(.)h(.)f(.)h(.)f(.)h(.)f(.) -h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h -(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.) -h(.)f(.)h(.)f(.)h(.)26 b Fo(5)149 949 y(2.3)45 b(History)15 -b(F)l(unctions)c Fa(.)e(.)e(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h -(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)g(.)f(.)h(.) -f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)26 -b Fo(6)299 1011 y(2.3.1)44 b(Initializing)18 b(History)d(and)h(State)e -(Managemen)o(t)g Fa(.)7 b(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h -(.)f(.)29 b Fo(6)299 1074 y(2.3.2)44 b(History)15 b(List)h(Managemen)o -(t)d Fa(.)7 b(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f -(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.)28 -b Fo(7)299 1136 y(2.3.3)44 b(Information)15 b(Ab)q(out)g(the)h(History) -f(List)c Fa(.)d(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h -(.)g(.)f(.)h(.)f(.)h(.)25 b Fo(7)299 1198 y(2.3.4)44 -b(Mo)o(ving)15 b(Around)g(the)g(History)g(List)10 b Fa(.)f(.)e(.)h(.)f -(.)h(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.) -h(.)f(.)25 b Fo(8)299 1260 y(2.3.5)44 b(Searc)o(hing)16 -b(the)f(History)g(List)7 b Fa(.)h(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h -(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)g(.)f(.)h(.) -f(.)h(.)21 b Fo(9)299 1323 y(2.3.6)44 b(Managing)15 b(the)g(History)g -(File)5 b Fa(.)k(.)e(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.) -f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)20 -b Fo(9)299 1385 y(2.3.7)44 b(History)15 b(Expansion)8 -b Fa(.)g(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.) -f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f -(.)h(.)23 b Fo(10)149 1447 y(2.4)45 b(History)15 b(V)l(ariables)5 -b Fa(.)k(.)e(.)h(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.) -f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h -(.)f(.)h(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)20 b Fo(11)149 -1510 y(2.5)45 b(History)15 b(Programming)f(Example)6 -b Fa(.)j(.)e(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.) -h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.)21 -b Fo(12)0 1634 y Fm(App)r(endix)j(A)67 b(Concept)22 b(Index)7 -b Fb(.)k(.)f(.)g(.)g(.)g(.)g(.)f(.)h(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)f(.) -h(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)29 b Fm(15)0 1774 y(App)r(endix)24 -b(B)67 b(F)-6 b(unction)25 b(and)e(V)-6 b(ariable)24 -b(Index)13 b Fb(.)d(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)35 -b Fm(17)p eop --2 21 bop 0 -58 a Fo(ii)1496 b(GNU)15 b(History)g(Library)p -eop end -userdict /end-hook known{end-hook}if
--- a/readline/doc/readline.0 Fri Jun 06 22:08:11 1997 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1122 +0,0 @@ - - - -READLINE(3) READLINE(3) - - -NNAAMMEE - readline - get a line from a user with editing - -SSYYNNOOPPSSIISS - ##iinncclluuddee <<rreeaaddlliinnee..hh>> - ##iinncclluuddee <<hhiissttoorryy..hh>> - - cchhaarr **rreeaaddlliinnee ((pprroommpptt)) - cchhaarr **pprroommpptt;; - -CCOOPPYYRRIIGGHHTT - Readline is Copyright (C) 1989, 1991, 1993, 1995, 1996 by - the Free Software Foundation, Inc. - -DDEESSCCRRIIPPTTIIOONN - rreeaaddlliinnee will read a line from the terminal and return it, - using pprroommpptt as a prompt. If pprroommpptt is null, no prompt is - issued. The line returned is allocated with _m_a_l_l_o_c(3), so - the caller must free it when finished. The line returned - has the final newline removed, so only the text of the - line remains. - - rreeaaddlliinnee offers editing capabilities while the user is - entering the line. By default, the line editing commands - are similar to those of emacs. A vi-style line editing - interface is also available. - -RREETTUURRNN VVAALLUUEE - rreeaaddlliinnee returns the text of the line read. A blank line - returns the empty string. If EEOOFF is encountered while - reading a line, and the line is empty, NNUULLLL is returned. - If an EEOOFF is read with a non-empty line, it is treated as - a newline. - -NNOOTTAATTIIOONN - An emacs-style notation is used to denote keystrokes. - Control keys are denoted by C-_k_e_y, e.g., C-n means Con- - trol-N. Similarly, _m_e_t_a keys are denoted by M-_k_e_y, so M-x - means Meta-X. (On keyboards without a _m_e_t_a key, M-_x means - ESC _x, i.e., press the Escape key then the _x key. This - makes ESC the _m_e_t_a _p_r_e_f_i_x. The combination M-C-_x means - ESC-Control-_x, or press the Escape key then hold the Con- - trol key while pressing the _x key.) - - Readline commands may be given numeric _a_r_g_u_m_e_n_t_s, which - normally act as a repeat count. Sometimes, however, it is - the sign of the argument that is significant. Passing a - negative argument to a command that acts in the forward - direction (e.g., kkiillll--lliinnee) causes that command to act in - a backward direction. Commands whose behavior with argu- - ments deviates from this are noted. - - When a command is described as _k_i_l_l_i_n_g text, the text - deleted is saved for possible future retrieval (_y_a_n_k_i_n_g). - - - -GNU 1997 Feb 5 1 - - - - - -READLINE(3) READLINE(3) - - - The killed text is saved in a _k_i_l_l _r_i_n_g. Consecutive - kills cause the text to be accumulated into one unit, - which can be yanked all at once. Commands which do not - kill text separate the chunks of text on the kill ring. - -IINNIITTIIAALLIIZZAATTIIOONN FFIILLEE - Readline is customized by putting commands in an initial- - ization file (the _i_n_p_u_t_r_c file). The name of this file is - taken from the value of the IINNPPUUTTRRCC environment variable. - If that variable is unset, the default is _~_/_._i_n_p_u_t_r_c. - When a program which uses the readline library starts up, - the init file is read, and the key bindings and variables - are set. There are only a few basic constructs allowed in - the readline init file. Blank lines are ignored. Lines - beginning with a ## are comments. Lines beginning with a $$ - indicate conditional constructs. Other lines denote key - bindings and variable settings. Each program using this - library may add its own commands and bindings. - - For example, placing - - M-Control-u: universal-argument - or - C-Meta-u: universal-argument - into the _i_n_p_u_t_r_c would make M-C-u execute the readline - command _u_n_i_v_e_r_s_a_l_-_a_r_g_u_m_e_n_t. - - The following symbolic character names are recognized - while processing key bindings: _R_U_B_O_U_T, _D_E_L, _E_S_C, _L_F_D, _N_E_W_- - _L_I_N_E, _R_E_T, _R_E_T_U_R_N, _S_P_C, _S_P_A_C_E, and _T_A_B. In addition to - command names, readline allows keys to be bound to a - string that is inserted when the key is pressed (a _m_a_c_r_o). - - - KKeeyy BBiinnddiinnggss - The syntax for controlling key bindings in the _i_n_p_u_t_r_c - file is simple. All that is required is the name of the - command or the text of a macro and a key sequence to which - it should be bound. The name may be specified in one of - two ways: as a symbolic key name, possibly with _M_e_t_a_- or - _C_o_n_t_r_o_l_- prefixes, or as a key sequence. When using the - form kkeeyynnaammee:_f_u_n_c_t_i_o_n_-_n_a_m_e or _m_a_c_r_o, _k_e_y_n_a_m_e is the name - of a key spelled out in English. For example: - - Control-u: universal-argument - Meta-Rubout: backward-kill-word - Control-o: ">&output" - - In the above example, _C_-_u is bound to the function uunniivveerr-- - ssaall--aarrgguummeenntt, _M_-_D_E_L is bound to the function bbaacckk-- - wwaarrdd--kkiillll--wwoorrdd, and _C_-_o is bound to run the macro - expressed on the right hand side (that is, to insert the - text _>_&_o_u_t_p_u_t into the line). - - - - -GNU 1997 Feb 5 2 - - - - - -READLINE(3) READLINE(3) - - - In the second form, ""kkeeyysseeqq"":_f_u_n_c_t_i_o_n_-_n_a_m_e or _m_a_c_r_o, kkeeyy-- - sseeqq differs from kkeeyynnaammee above in that strings denoting an - entire key sequence may be specified by placing the - sequence within double quotes. Some GNU Emacs style key - escapes can be used, as in the following example. - - "\C-u": universal-argument - "\C-x\C-r": re-read-init-file - "\e[11~": "Function Key 1" - - In this example, _C_-_u is again bound to the function uunnii-- - vveerrssaall--aarrgguummeenntt. _C_-_x _C_-_r is bound to the function - rree--rreeaadd--iinniitt--ffiillee, and _E_S_C _[ _1 _1 _~ is bound to insert the - text FFuunnccttiioonn KKeeyy 11. The full set of escape sequences is - - \\CC-- control prefix - - \\MM-- meta prefix - - \\ee an escape character - - \\\\ backslash - - \\"" literal " - - \\'' literal ' - - When entering the text of a macro, single or double quotes - should be used to indicate a macro definition. Unquoted - text is assumed to be a function name. Backslash will - quote any character in the macro text, including " and '. - - BBaasshh allows the current readline key bindings to be dis- - played or modified with the bbiinndd builtin command. The - editing mode may be switched during interactive use by - using the --oo option to the sseett builtin command. Other - programs using this library provide similar mechanisms. - The _i_n_p_u_t_r_c file may be edited and re-read if a program - does not provide any other means to incorporate new bind- - ings. - - VVaarriiaabblleess - Readline has variables that can be used to further cus- - tomize its behavior. A variable may be set in the _i_n_p_u_t_r_c - file with a statement of the form - - sseett _v_a_r_i_a_b_l_e_-_n_a_m_e _v_a_l_u_e - - Except where noted, readline variables can take the values - OOnn or OOffff. The variables and their default values are: - - bbeellll--ssttyyllee ((aauuddiibbllee)) - Controls what happens when readline wants to ring - the terminal bell. If set to nnoonnee, readline never - - - -GNU 1997 Feb 5 3 - - - - - -READLINE(3) READLINE(3) - - - rings the bell. If set to vviissiibbllee, readline uses a - visible bell if one is available. If set to aauuddii-- - bbllee, readline attempts to ring the terminal's bell. - ccoommmmeenntt--bbeeggiinn ((````##'''')) - The string that is inserted in vvii mode when the - iinnsseerrtt--ccoommmmeenntt command is executed. This command - is bound to MM--## in emacs mode and to ## in vi com- - mand mode. - ccoommpplleettiioonn--qquueerryy--iitteemmss ((110000)) - This determines when the user is queried about - viewing the number of possible completions gener- - ated by the ppoossssiibbllee--ccoommpplleettiioonnss command. It may - be set to any integer value greater than or equal - to zero. If the number of possible completions is - greater than or equal to the value of this vari- - able, the user is asked whether or not he wishes to - view them; otherwise they are simply listed on the - terminal. - ccoonnvveerrtt--mmeettaa ((OOnn)) - If set to OOnn, readline will convert characters with - the eighth bit set to an ASCII key sequence by - stripping the eighth bit and prepending an escape - character (in effect, using escape as the _m_e_t_a _p_r_e_- - _f_i_x). - ddiissaabbllee--ccoommpplleettiioonn ((OOffff)) - If set to OOnn, readline will inhibit word comple- - tion. Completion characters will be inserted into - the line as if they had been mapped to sseellff--iinnsseerrtt. - eeddiittiinngg--mmooddee ((eemmaaccss)) - Controls whether readline begins with a set of key - bindings similar to _e_m_a_c_s or _v_i. eeddiittiinngg--mmooddee can - be set to either eemmaaccss or vvii. - eennaabbllee--kkeeyyppaadd ((OOffff)) - When set to OOnn, readline will try to enable the - application keypad when it is called. Some systems - need this to enable the arrow keys. - eexxppaanndd--ttiillddee ((OOffff)) - If set to oonn, tilde expansion is performed when - readline attempts word completion. - hhoorriizzoonnttaall--ssccrroollll--mmooddee ((OOffff)) - When set to OOnn, makes readline use a single line - for display, scrolling the input horizontally on a - single screen line when it becomes longer than the - screen width rather than wrapping to a new line. - kkeeyymmaapp ((eemmaaccss)) - Set the current readline keymap. The set of legal - keymap names is _e_m_a_c_s_, _e_m_a_c_s_-_s_t_a_n_d_a_r_d_, _e_m_a_c_s_-_m_e_t_a_, - _e_m_a_c_s_-_c_t_l_x_, _v_i_, _v_i_-_m_o_v_e_, _v_i_-_c_o_m_m_a_n_d, and _v_i_-_i_n_s_e_r_t. - _v_i is equivalent to _v_i_-_c_o_m_m_a_n_d; _e_m_a_c_s is equivalent - to _e_m_a_c_s_-_s_t_a_n_d_a_r_d. The default value is _e_m_a_c_s; the - value of eeddiittiinngg--mmooddee also affects the default - keymap. - mmaarrkk--ddiirreeccttoorriieess ((OOnn)) - If set to OOnn, completed directory names have a - - - -GNU 1997 Feb 5 4 - - - - - -READLINE(3) READLINE(3) - - - slash appended. - mmaarrkk--mmooddiiffiieedd--lliinneess ((OOffff)) - If set to OOnn, history lines that have been modified - are displayed with a preceding asterisk (**). - mmeettaa--ffllaagg ((OOffff)) - If set to OOnn, readline will enable eight-bit input - (that is, it will not strip the high bit from the - characters it reads), regardless of what the termi- - nal claims it can support. - oouuttppuutt--mmeettaa ((OOffff)) - If set to OOnn, readline will display characters with - the eighth bit set directly rather than as a meta- - prefixed escape sequence. - sshhooww--aallll--iiff--aammbbiigguuoouuss ((OOffff)) - This alters the default behavior of the completion - functions. If set to oonn, words which have more - than one possible completion cause the matches to - be listed immediately instead of ringing the bell. - vviissiibbllee--ssttaattss ((OOffff)) - If set to OOnn, a character denoting a file's type as - reported by ssttaatt(2) is appended to the filename - when listing possible completions. - - CCoonnddiittiioonnaall CCoonnssttrruuccttss - Readline implements a facility similar in spirit to the - conditional compilation features of the C preprocessor - which allows key bindings and variable settings to be per- - formed as the result of tests. There are three parser - directives used. - - $$iiff The $$iiff construct allows bindings to be made based - on the editing mode, the terminal being used, or - the application using readline. The text of the - test extends to the end of the line; no characters - are required to isolate it. - - mmooddee The mmooddee== form of the $$iiff directive is used - to test whether readline is in emacs or vi - mode. This may be used in conjunction with - the sseett kkeeyymmaapp command, for instance, to set - bindings in the _e_m_a_c_s_-_s_t_a_n_d_a_r_d and _e_m_a_c_s_- - _c_t_l_x keymaps only if readline is starting - out in emacs mode. - - tteerrmm The tteerrmm== form may be used to include termi- - nal-specific key bindings, perhaps to bind - the key sequences output by the terminal's - function keys. The word on the right side - of the == is tested against the full name of - the terminal and the portion of the terminal - name before the first --. This allows _s_u_n to - match both _s_u_n and _s_u_n_-_c_m_d, for instance. - - - - - -GNU 1997 Feb 5 5 - - - - - -READLINE(3) READLINE(3) - - - aapppplliiccaattiioonn - The aapppplliiccaattiioonn construct is used to include - application-specific settings. Each program - using the readline library sets the _a_p_p_l_i_c_a_- - _t_i_o_n _n_a_m_e, and an initialization file can - test for a particular value. This could be - used to bind key sequences to functions use- - ful for a specific program. For instance, - the following command adds a key sequence - that quotes the current or previous word in - Bash: - $$iiff bash - # Quote the current or previous word - "\C-xq": "\eb\"\ef\"" - $$eennddiiff - - $$eennddiiff This command, as you saw in the previous example, - terminates an $$iiff command. - - $$eellssee Commands in this branch of the $$iiff directive are - executed if the test fails. - -SSEEAARRCCHHIINNGG - Readline provides commands for searching through the com- - mand history for lines containing a specified string. - There are two search modes: _i_n_c_r_e_m_e_n_t_a_l and _n_o_n_- - _i_n_c_r_e_m_e_n_t_a_l. - - Incremental searches begin before the user has finished - typing the search string. As each character of the search - string is typed, readline displays the next entry from the - history matching the string typed so far. An incremental - search requires only as many characters as needed to find - the desired history entry. The Escape character is used - to terminate an incremental search. Control-J will also - terminate the search. Control-G will abort an incremental - search and restore the original line. When the search is - terminated, the history entry containing the search string - becomes the current line. To find other matching entries - in the history list, type Control-S or Control-R as appro- - priate. This will search backward or forward in the his- - tory for the next line matching the search string typed so - far. Any other key sequence bound to a readline command - will terminate the search and execute that command. For - instance, a _n_e_w_l_i_n_e will terminate the search and accept - the line, thereby executing the command from the history - list. - - Non-incremental searches read the entire search string - before starting to search for matching history lines. The - search string may be typed by the user or part of the con- - tents of the current line. - - - - - -GNU 1997 Feb 5 6 - - - - - -READLINE(3) READLINE(3) - - -EEDDIITTIINNGG CCOOMMMMAANNDDSS - The following is a list of the names of the commands and - the default key sequences to which they are bound. Com- - mand names without an accompanying key sequence are - unbound by default. - - CCoommmmaannddss ffoorr MMoovviinngg - bbeeggiinnnniinngg--ooff--lliinnee ((CC--aa)) - Move to the start of the current line. - eenndd--ooff--lliinnee ((CC--ee)) - Move to the end of the line. - ffoorrwwaarrdd--cchhaarr ((CC--ff)) - Move forward a character. - bbaacckkwwaarrdd--cchhaarr ((CC--bb)) - Move back a character. - ffoorrwwaarrdd--wwoorrdd ((MM--ff)) - Move forward to the end of the next word. Words - are composed of alphanumeric characters (letters - and digits). - bbaacckkwwaarrdd--wwoorrdd ((MM--bb)) - Move back to the start of this, or the previous, - word. Words are composed of alphanumeric charac- - ters (letters and digits). - cclleeaarr--ssccrreeeenn ((CC--ll)) - Clear the screen leaving the current line at the - top of the screen. With an argument, refresh the - current line without clearing the screen. - rreeddrraaww--ccuurrrreenntt--lliinnee - Refresh the current line. - - CCoommmmaannddss ffoorr MMaanniippuullaattiinngg tthhee HHiissttoorryy - aacccceepptt--lliinnee ((NNeewwlliinnee,, RReettuurrnn)) - Accept the line regardless of where the cursor is. - If this line is non-empty, add it to the history - list. If the line is a modified history line, then - restore the history line to its original state. - pprreevviioouuss--hhiissttoorryy ((CC--pp)) - Fetch the previous command from the history list, - moving back in the list. - nneexxtt--hhiissttoorryy ((CC--nn)) - Fetch the next command from the history list, mov- - ing forward in the list. - bbeeggiinnnniinngg--ooff--hhiissttoorryy ((MM--<<)) - Move to the first line in the history. - eenndd--ooff--hhiissttoorryy ((MM-->>)) - Move to the end of the input history, i.e., the - line currently being entered. - rreevveerrssee--sseeaarrcchh--hhiissttoorryy ((CC--rr)) - Search backward starting at the current line and - moving `up' through the history as necessary. This - is an incremental search. - ffoorrwwaarrdd--sseeaarrcchh--hhiissttoorryy ((CC--ss)) - Search forward starting at the current line and - moving `down' through the history as necessary. - - - -GNU 1997 Feb 5 7 - - - - - -READLINE(3) READLINE(3) - - - This is an incremental search. - nnoonn--iinnccrreemmeennttaall--rreevveerrssee--sseeaarrcchh--hhiissttoorryy ((MM--pp)) - Search backward through the history starting at the - current line using a non-incremental search for a - string supplied by the user. - nnoonn--iinnccrreemmeennttaall--ffoorrwwaarrdd--sseeaarrcchh--hhiissttoorryy ((MM--nn)) - Search forward through the history using a non- - incremental search for a string supplied by the - user. - hhiissttoorryy--sseeaarrcchh--ffoorrwwaarrdd - Search forward through the history for the string - of characters between the start of the current line - and the current cursor position (the _p_o_i_n_t). This - is a non-incremental search. - hhiissttoorryy--sseeaarrcchh--bbaacckkwwaarrdd - Search backward through the history for the string - of characters between the start of the current line - and the point. This is a non-incremental search. - yyaannkk--nntthh--aarrgg ((MM--CC--yy)) - Insert the first argument to the previous command - (usually the second word on the previous line) at - point (the current cursor position). With an argu- - ment _n, insert the _nth word from the previous com- - mand (the words in the previous command begin with - word 0). A negative argument inserts the _nth word - from the end of the previous command. - yyaannkk--llaasstt--aarrgg ((MM--..,, MM--__)) - Insert the last argument to the previous command - (the last word of the previous history entry). - With an argument, behave exactly like yyaannkk--nntthh--aarrgg. - - CCoommmmaannddss ffoorr CChhaannggiinngg TTeexxtt - ddeelleettee--cchhaarr ((CC--dd)) - Delete the character under the cursor. If point is - at the beginning of the line, there are no charac- - ters in the line, and the last character typed was - not CC--dd, then return EEOOFF. - bbaacckkwwaarrdd--ddeelleettee--cchhaarr ((RRuubboouutt)) - Delete the character behind the cursor. When given - a numeric argument, save the deleted text on the - kill ring. - qquuootteedd--iinnsseerrtt ((CC--qq,, CC--vv)) - Add the next character that you type to the line - verbatim. This is how to insert characters like - CC--qq, for example. - ttaabb--iinnsseerrtt ((MM--TTAABB)) - Insert a tab character. - sseellff--iinnsseerrtt ((aa,, bb,, AA,, 11,, !!,, ......)) - Insert the character typed. - ttrraannssppoossee--cchhaarrss ((CC--tt)) - Drag the character before point forward over the - character at point. Point moves forward as well. - If point is at the end of the line, then transpose - the two characters before point. Negative - - - -GNU 1997 Feb 5 8 - - - - - -READLINE(3) READLINE(3) - - - arguments don't work. - ttrraannssppoossee--wwoorrddss ((MM--tt)) - Drag the word behind the cursor past the word in - front of the cursor moving the cursor over that - word as well. - uuppccaassee--wwoorrdd ((MM--uu)) - Uppercase the current (or following) word. With a - negative argument, do the previous word, but do not - move point. - ddoowwnnccaassee--wwoorrdd ((MM--ll)) - Lowercase the current (or following) word. With a - negative argument, do the previous word, but do not - move point. - ccaappiittaalliizzee--wwoorrdd ((MM--cc)) - Capitalize the current (or following) word. With a - negative argument, do the previous word, but do not - move point. - - KKiilllliinngg aanndd YYaannkkiinngg - kkiillll--lliinnee ((CC--kk)) - Kill the text from the current cursor position to - the end of the line. - bbaacckkwwaarrdd--kkiillll--lliinnee ((CC--xx RRuubboouutt)) - Kill backward to the beginning of the line. - uunniixx--lliinnee--ddiissccaarrdd ((CC--uu)) - Kill backward from point to the beginning of the - line. - kkiillll--wwhhoollee--lliinnee - Kill all characters on the current line, no matter - where the cursor is. - kkiillll--wwoorrdd ((MM--dd)) - Kill from the cursor to the end of the current - word, or if between words, to the end of the next - word. Word boundaries are the same as those used - by ffoorrwwaarrdd--wwoorrdd. - bbaacckkwwaarrdd--kkiillll--wwoorrdd ((MM--RRuubboouutt)) - Kill the word behind the cursor. Word boundaries - are the same as those used by bbaacckkwwaarrdd--wwoorrdd. - uunniixx--wwoorrdd--rruubboouutt ((CC--ww)) - Kill the word behind the cursor, using white space - as a word boundary. The word boundaries are dif- - ferent from bbaacckkwwaarrdd--kkiillll--wwoorrdd. - ddeelleettee--hhoorriizzoonnttaall--ssppaaccee ((MM--\\)) - Delete all spaces and tabs around point. - kkiillll--rreeggiioonn - Kill the text between the point and _m_a_r_k (saved - cursor position). This text is referred to as the - _r_e_g_i_o_n. - ccooppyy--rreeggiioonn--aass--kkiillll - Copy the text in the region to the kill buffer. - ccooppyy--bbaacckkwwaarrdd--wwoorrdd - Copy the word before point to the kill buffer. - ccooppyy--ffoorrwwaarrdd--wwoorrdd - Copy the word following point to the kill buffer. - - - -GNU 1997 Feb 5 9 - - - - - -READLINE(3) READLINE(3) - - - yyaannkk ((CC--yy)) - Yank the top of the kill ring into the buffer at - the cursor. - yyaannkk--ppoopp ((MM--yy)) - Rotate the kill ring, and yank the new top. Only - works following yyaannkk or yyaannkk--ppoopp. - - NNuummeerriicc AArrgguummeennttss - ddiiggiitt--aarrgguummeenntt ((MM--00,, MM--11,, ......,, MM----)) - Add this digit to the argument already accumulat- - ing, or start a new argument. M-- starts a nega- - tive argument. - uunniivveerrssaall--aarrgguummeenntt - This is another way to specify an argument. If - this command is followed by one or more digits, - optionally with a leading minus sign, those digits - define the argument. If the command is followed by - digits, executing uunniivveerrssaall--aarrgguummeenntt again ends the - numeric argument, but is otherwise ignored. As a - special case, if this command is immediately fol- - lowed by a character that is neither a digit or - minus sign, the argument count for the next command - is multiplied by four. The argument count is ini- - tially one, so executing this function the first - time makes the argument count four, a second time - makes the argument count sixteen, and so on. - - CCoommpplleettiinngg - ccoommpplleettee ((TTAABB)) - Attempt to perform completion on the text before - point. The actual completion performed is applica- - tion-specific. BBaasshh, for instance, attempts com- - pletion treating the text as a variable (if the - text begins with $$), username (if the text begins - with ~~), hostname (if the text begins with @@), or - command (including aliases and functions) in turn. - If none of these produces a match, filename comple- - tion is attempted. GGddbb, on the other hand, allows - completion of program functions and variables, and - only attempts filename completion under certain - circumstances. - ppoossssiibbllee--ccoommpplleettiioonnss ((MM--??)) - List the possible completions of the text before - point. - iinnsseerrtt--ccoommpplleettiioonnss ((MM--**)) - Insert all completions of the text before point - that would have been generated by ppoossssii-- - bbllee--ccoommpplleettiioonnss. - - KKeeyybbooaarrdd MMaaccrrooss - ssttaarrtt--kkbbdd--mmaaccrroo ((CC--xx (()) - Begin saving the characters typed into the current - keyboard macro. - - - - -GNU 1997 Feb 5 10 - - - - - -READLINE(3) READLINE(3) - - - eenndd--kkbbdd--mmaaccrroo ((CC--xx )))) - Stop saving the characters typed into the current - keyboard macro and store the definition. - ccaallll--llaasstt--kkbbdd--mmaaccrroo ((CC--xx ee)) - Re-execute the last keyboard macro defined, by mak- - ing the characters in the macro appear as if typed - at the keyboard. - - MMiisscceellllaanneeoouuss - rree--rreeaadd--iinniitt--ffiillee ((CC--xx CC--rr)) - Read in the contents of the _i_n_p_u_t_r_c file, and - incorporate any bindings or variable assignments - found there. - aabboorrtt ((CC--gg)) - Abort the current editing command and ring the ter- - minal's bell (subject to the setting of - bbeellll--ssttyyllee). - ddoo--uuppppeerrccaassee--vveerrssiioonn ((MM--aa,, MM--bb,, MM--_x,, ......)) - If the metafied character _x is lowercase, run the - command that is bound to the corresponding upper- - case character. - pprreeffiixx--mmeettaa ((EESSCC)) - Metafy the next character typed. EESSCC ff is equiva- - lent to MMeettaa--ff. - uunnddoo ((CC--__,, CC--xx CC--uu)) - Incremental undo, separately remembered for each - line. - rreevveerrtt--lliinnee ((MM--rr)) - Undo all changes made to this line. This is like - typing the uunnddoo command enough times to return the - line to its initial state. - ttiillddee--eexxppaanndd ((MM--~~)) - Perform tilde expansion on the current word. - sseett--mmaarrkk ((CC--@@,, MM--<<ssppaaccee>>)) - Set the mark to the current point. If a numeric - argument is supplied, the mark is set to that posi- - tion. - eexxcchhaannggee--ppooiinntt--aanndd--mmaarrkk ((CC--xx CC--xx)) - Swap the point with the mark. The current cursor - position is set to the saved position, and the old - cursor position is saved as the mark. - cchhaarraacctteerr--sseeaarrcchh ((CC--]])) - A character is read and point is moved to the next - occurrence of that character. A negative count - searches for previous occurrences. - cchhaarraacctteerr--sseeaarrcchh--bbaacckkwwaarrdd ((MM--CC--]])) - A character is read and point is moved to the pre- - vious occurrence of that character. A negative - count searches for subsequent occurrences. - iinnsseerrtt--ccoommmmeenntt ((MM--##)) - The value of the readline ccoommmmeenntt--bbeeggiinn variable is - inserted at the beginning of the current line, and - the line is accepted as if a newline had been - typed. This makes the current line a shell - - - -GNU 1997 Feb 5 11 - - - - - -READLINE(3) READLINE(3) - - - comment. - gglloobb--eexxppaanndd--wwoorrdd ((CC--xx **)) - The word before point is treated as a pattern for - pathname expansion, and the list of matching file - names is inserted, replacing the word. - gglloobb--lliisstt--eexxppaannssiioonnss ((CC--xx gg)) - The list of expansions that would have been gener- - ated by gglloobb--eexxppaanndd--wwoorrdd is inserted into the line, - replacing the word before point. - dduummpp--ffuunnccttiioonnss - Print all of the functions and their key bindings - to the readline output stream. If a numeric argu- - ment is supplied, the output is formatted in such a - way that it can be made part of an _i_n_p_u_t_r_c file. - dduummpp--vvaarriiaabblleess - Print all of the settable variables and their val- - ues to the readline output stream. If a numeric - argument is supplied, the output is formatted in - such a way that it can be made part of an _i_n_p_u_t_r_c - file. - dduummpp--mmaaccrrooss - Print all of the readline key sequences bound to - macros and the strings they ouput. If a numeric - argument is supplied, the output is formatted in - such a way that it can be made part of an _i_n_p_u_t_r_c - file. - eemmaaccss--eeddiittiinngg--mmooddee ((CC--ee)) - When in vvii editing mode, this causes a switch to - eemmaaccss editing mode. - vvii--eeddiittiinngg--mmooddee ((MM--CC--jj)) - When in eemmaaccss editing mode, this causes a switch to - vvii editing mode. - -DDEEFFAAUULLTT KKEEYY BBIINNDDIINNGGSS - The following is a list of the default emacs and vi bind- - ings. Characters with the 8th bit set are written as - M-<character>, and are referred to as _m_e_t_a_f_i_e_d characters. - The printable ASCII characters not mentioned in the list - of emacs standard bindings are bound to the _s_e_l_f_-_i_n_s_e_r_t - function, which just inserts the given character into the - input line. In vi insertion mode, all characters not - specifically mentioned are bound to _s_e_l_f_-_i_n_s_e_r_t. Charac- - ters assigned to signal generation by _s_t_t_y(1) or the ter- - minal driver, such as C-Z or C-C, retain that function. - Upper and lower case _m_e_t_a_f_i_e_d characters are bound to the - same function in the emacs mode meta keymap. The remain- - ing characters are unbound, which causes readline to ring - the bell (subject to the setting of the bbeellll--ssttyyllee vari- - able). - - EEmmaaccss MMooddee - Emacs Standard bindings - - "C-@" set-mark - - - -GNU 1997 Feb 5 12 - - - - - -READLINE(3) READLINE(3) - - - "C-A" beginning-of-line - "C-B" backward-char - "C-D" delete-char - "C-E" end-of-line - "C-F" forward-char - "C-G" abort - "C-H" backward-delete-char - "C-I" complete - "C-J" accept-line - "C-K" kill-line - "C-L" clear-screen - "C-M" accept-line - "C-N" next-history - "C-P" previous-history - "C-Q" quoted-insert - "C-R" reverse-search-history - "C-S" forward-search-history - "C-T" transpose-chars - "C-U" unix-line-discard - "C-V" quoted-insert - "C-W" unix-word-rubout - "C-Y" yank - "C-]" character-search - "C-_" undo - " " to "/" self-insert - "0" to "9" self-insert - ":" to "~" self-insert - "C-?" backward-delete-char - - Emacs Meta bindings - - "M-C-G" abort - "M-C-H" backward-kill-word - "M-C-I" tab-insert - "M-C-J" vi-editing-mode - "M-C-M" vi-editing-mode - "M-C-R" revert-line - "M-C-Y" yank-nth-arg - "M-C-[" complete - "M-C-]" character-search-backward - "M-space" set-mark - "M-#" insert-comment - "M-&" tilde-expand - "M-*" insert-completions - "M--" digit-argument - "M-." yank-last-arg - "M-0" digit-argument - "M-1" digit-argument - "M-2" digit-argument - "M-3" digit-argument - "M-4" digit-argument - "M-5" digit-argument - "M-6" digit-argument - "M-7" digit-argument - - - -GNU 1997 Feb 5 13 - - - - - -READLINE(3) READLINE(3) - - - "M-8" digit-argument - "M-9" digit-argument - "M-<" beginning-of-history - "M-=" possible-completions - "M->" end-of-history - "M-?" possible-completions - "M-B" backward-word - "M-C" capitalize-word - "M-D" kill-word - "M-F" forward-word - "M-L" downcase-word - "M-N" non-incremental-forward-search-history - "M-P" non-incremental-reverse-search-history - "M-R" revert-line - "M-T" transpose-words - "M-U" upcase-word - "M-Y" yank-pop - "M-\" delete-horizontal-space - "M-~" tilde-expand - "M-C-?" backward-delete-word - "M-_" yank-last-arg - - Emacs Control-X bindings - - "C-XC-G" abort - "C-XC-R" re-read-init-file - "C-XC-U" undo - "C-XC-X" exchange-point-and-mark - "C-X(" start-kbd-macro - "C-X)" end-kbd-macro - "C-XE" call-last-kbd-macro - "C-XC-?" backward-kill-line - - - VVII MMooddee bbiinnddiinnggss - VI Insert Mode functions - - "C-D" vi-eof-maybe - "C-H" backward-delete-char - "C-I" complete - "C-J" accept-line - "C-M" accept-line - "C-R" reverse-search-history - "C-S" forward-search-history - "C-T" transpose-chars - "C-U" unix-line-discard - "C-V" quoted-insert - "C-W" unix-word-rubout - "C-Y" yank - "C-[" vi-movement-mode - "C-_" undo - " " to "~" self-insert - "C-?" backward-delete-char - - - - -GNU 1997 Feb 5 14 - - - - - -READLINE(3) READLINE(3) - - - VI Command Mode functions - - "C-D" vi-eof-maybe - "C-E" emacs-editing-mode - "C-G" abort - "C-H" backward-char - "C-J" accept-line - "C-K" kill-line - "C-L" clear-screen - "C-M" accept-line - "C-N" next-history - "C-P" previous-history - "C-Q" quoted-insert - "C-R" reverse-search-history - "C-S" forward-search-history - "C-T" transpose-chars - "C-U" unix-line-discard - "C-V" quoted-insert - "C-W" unix-word-rubout - "C-Y" yank - " " forward-char - "#" insert-comment - "$" end-of-line - "%" vi-match - "&" vi-tilde-expand - "*" vi-complete - "+" next-history - "," vi-char-search - "-" previous-history - "." vi-redo - "/" vi-search - "0" beginning-of-line - "1" to "9" vi-arg-digit - ";" vi-char-search - "=" vi-complete - "?" vi-search - "A" vi-append-eol - "B" vi-prev-word - "C" vi-change-to - "D" vi-delete-to - "E" vi-end-word - "F" vi-char-search - "G" vi-fetch-history - "I" vi-insert-beg - "N" vi-search-again - "P" vi-put - "R" vi-replace - "S" vi-subst - "T" vi-char-search - "U" revert-line - "W" vi-next-word - "X" backward-delete-char - "Y" vi-yank-to - "\" vi-complete - - - -GNU 1997 Feb 5 15 - - - - - -READLINE(3) READLINE(3) - - - "^" vi-first-print - "_" vi-yank-arg - "`" vi-goto-mark - "a" vi-append-mode - "b" vi-prev-word - "c" vi-change-to - "d" vi-delete-to - "e" vi-end-word - "f" vi-char-search - "h" backward-char - "i" vi-insertion-mode - "j" next-history - "k" prev-history - "l" forward-char - "m" vi-set-mark - "n" vi-search-again - "p" vi-put - "r" vi-change-char - "s" vi-subst - "t" vi-char-search - "u" undo - "w" vi-next-word - "x" vi-delete - "y" vi-yank-to - "|" vi-column - "~" vi-change-case - -SSEEEE AALLSSOO - _T_h_e _G_n_u _R_e_a_d_l_i_n_e _L_i_b_r_a_r_y, Brian Fox and Chet Ramey - _T_h_e _G_n_u _H_i_s_t_o_r_y _L_i_b_r_a_r_y, Brian Fox and Chet Ramey - _b_a_s_h(1) - -FFIILLEESS - _~_/_._i_n_p_u_t_r_c - Individual rreeaaddlliinnee initialization file - -AAUUTTHHOORRSS - Brian Fox, Free Software Foundation (primary author) - bfox@ai.MIT.Edu - - Chet Ramey, Case Western Reserve University - chet@ins.CWRU.Edu - -BBUUGG RREEPPOORRTTSS - If you find a bug in rreeaaddlliinnee,, you should report it. But - first, you should make sure that it really is a bug, and - that it appears in the latest version of the rreeaaddlliinnee - library that you have. - - Once you have determined that a bug actually exists, mail - a bug report to _b_u_g_-_r_e_a_d_l_i_n_e@_p_r_e_p_._a_i_._M_I_T_._E_d_u. If you have - a fix, you are welcome to mail that as well! Suggestions - and `philosophical' bug reports may be mailed to _b_u_g_- - _r_e_a_d_l_i_n_e@_p_r_e_p_._a_i_._M_I_T_._E_d_u or posted to the Usenet newsgroup - - - -GNU 1997 Feb 5 16 - - - - - -READLINE(3) READLINE(3) - - - ggnnuu..bbaasshh..bbuugg. - - Comments and bug reports concerning this manual page - should be directed to _c_h_e_t_@_i_n_s_._C_W_R_U_._E_d_u. - -BBUUGGSS - It's too big and too slow. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -GNU 1997 Feb 5 17 - -
--- a/readline/doc/readline.html Fri Jun 06 22:08:11 1997 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,3363 +0,0 @@ -<HTML> -<HEAD> -<!-- This HTML file has been created by texi2html 1.51 - from /usr/homes/chet/src/bash/readline-2.1-beta2/doc/rlman.texinfo on 22 May 1997 --> - -<TITLE>GNU Readline Library</TITLE> -</HEAD> -<BODY> -<H1>GNU Readline Library</H1> -<H2>Edition 2.1, for <CODE>Readline Library</CODE> Version 2.1.</H2> -<H2>March 1996</H2> -<ADDRESS>Brian Fox, Free Software Foundation</ADDRESS> -<ADDRESS>Chet Ramey, Case Western Reserve University</ADDRESS> -<P> -<P><HR><P> - -<P> -This document describes the GNU Readline Library, a utility which aids -in the consistency of user interface across discrete programs that need -to provide a command line interface. - -</P> -<P> -Published by the Free Software Foundation <BR> -675 Massachusetts Avenue, <BR> -Cambridge, MA 02139 USA - -</P> -<P> -Permission is granted to make and distribute verbatim copies of -this manual provided the copyright notice and this permission notice -are preserved on all copies. - -</P> -<P> -Permission is granted to copy and distribute modified versions of this -manual under the conditions for verbatim copying, provided that the entire -resulting derived work is distributed under the terms of a permission -notice identical to this one. - -</P> -<P> -Permission is granted to copy and distribute translations of this manual -into another language, under the above conditions for modified versions, -except that this permission notice may be stated in a translation approved -by the Foundation. - -</P> -<P> -Copyright (C) 1989, 1991 Free Software Foundation, Inc. - -</P> - - - -<H1><A NAME="SEC1" HREF="readline_toc.html#TOC1">Command Line Editing</A></H1> - -<P> -This chapter describes the basic features of the GNU -command line editing interface. - -</P> - - - -<H2><A NAME="SEC2" HREF="readline_toc.html#TOC2">Introduction to Line Editing</A></H2> - -<P> -The following paragraphs describe the notation used to represent -keystrokes. - -</P> -<P> -The text <KBD>C-k</KBD> is read as `Control-K' and describes the character -produced when the <KBD>k</KBD> key is pressed while the Control key -is depressed. - -</P> -<P> -The text <KBD>M-k</KBD> is read as `Meta-K' and describes the character -produced when the meta key (if you have one) is depressed, and the <KBD>k</KBD> -key is pressed. If you do not have a meta key, the identical keystroke -can be generated by typing <KBD>ESC</KBD> <I>first</I>, and then typing <KBD>k</KBD>. -Either process is known as <STRONG>metafying</STRONG> the <KBD>k</KBD> key. - -</P> -<P> -The text <KBD>M-C-k</KBD> is read as `Meta-Control-k' and describes the -character produced by <STRONG>metafying</STRONG> <KBD>C-k</KBD>. - -</P> -<P> -In addition, several keys have their own names. Specifically, -<KBD>DEL</KBD>, <KBD>ESC</KBD>, <KBD>LFD</KBD>, <KBD>SPC</KBD>, <KBD>RET</KBD>, and <KBD>TAB</KBD> all -stand for themselves when seen in this text, or in an init file -(@xref{Readline Init File}). - -</P> - - -<H2><A NAME="SEC3" HREF="readline_toc.html#TOC3">Readline Interaction</A></H2> -<P> -<A NAME="IDX1"></A> - -</P> -<P> -Often during an interactive session you type in a long line of text, -only to notice that the first word on the line is misspelled. The -Readline library gives you a set of commands for manipulating the text -as you type it in, allowing you to just fix your typo, and not forcing -you to retype the majority of the line. Using these editing commands, -you move the cursor to the place that needs correction, and delete or -insert the text of the corrections. Then, when you are satisfied with -the line, you simply press <KBD>RETURN</KBD>. You do not have to be at the -end of the line to press <KBD>RETURN</KBD>; the entire line is accepted -regardless of the location of the cursor within the line. - -</P> - - - -<H3><A NAME="SEC4" HREF="readline_toc.html#TOC4">Readline Init File Syntax</A></H3> - -<P> -There are only a few basic constructs allowed in the -Readline init file. Blank lines are ignored. -Lines beginning with a <SAMP>`#'</SAMP> are comments. -Lines beginning with a <SAMP>`$'</SAMP> indicate conditional -constructs (see section <A HREF="readline.html#SEC5">Conditional Init Constructs</A>). Other lines -denote variable settings and key bindings. - -</P> -<DL COMPACT> - -<DT>Variable Settings -<DD> -You can change the state of a few variables in Readline by -using the <CODE>set</CODE> command within the init file. Here is how you -would specify that you wish to use <CODE>vi</CODE> line editing commands: - - -<PRE> -set editing-mode vi -</PRE> - -Right now, there are only a few variables which can be set; -so few, in fact, that we just list them here: - -<DL COMPACT> - -<DT><CODE>bell-style</CODE> -<DD> -<A NAME="IDX2"></A> -Controls what happens when Readline wants to ring the terminal bell. -If set to <SAMP>`none'</SAMP>, Readline never rings the bell. If set to -<SAMP>`visible'</SAMP>, Readline uses a visible bell if one is available. -If set to <SAMP>`audible'</SAMP> (the default), Readline attempts to ring -the terminal's bell. - -<DT><CODE>comment-begin</CODE> -<DD> -<A NAME="IDX3"></A> -The string to insert at the beginning of the line when the -<CODE>insert-comment</CODE> command is executed. The default value -is <CODE>"#"</CODE>. - -<DT><CODE>completion-query-items</CODE> -<DD> -<A NAME="IDX4"></A> -The number of possible completions that determines when the user is -asked whether he wants to see the list of possibilities. If the -number of possible completions is greater than this value, -Readline will ask the user whether or not he wishes to view -them; otherwise, they are simply listed. The default limit is -<CODE>100</CODE>. - -<DT><CODE>convert-meta</CODE> -<DD> -<A NAME="IDX5"></A> -If set to <SAMP>`on'</SAMP>, Readline will convert characters with the -eigth bit set to an ASCII key sequence by stripping the eigth -bit and prepending an <KBD>ESC</KBD> character, converting them to a -meta-prefixed key sequence. The default value is <SAMP>`on'</SAMP>. - -<DT><CODE>disable-completion</CODE> -<DD> -<A NAME="IDX6"></A> -If set to <SAMP>`On'</SAMP>, readline will inhibit word completion. -Completion characters will be inserted into the line as if they had -been mapped to <CODE>self-insert</CODE>. The default is <SAMP>`off'</SAMP>. - -<DT><CODE>editing-mode</CODE> -<DD> -<A NAME="IDX7"></A> -The <CODE>editing-mode</CODE> variable controls which editing mode you are -using. By default, Readline starts up in Emacs editing mode, where -the keystrokes are most similar to Emacs. This variable can be -set to either <SAMP>`emacs'</SAMP> or <SAMP>`vi'</SAMP>. - -<DT><CODE>enable-keypad</CODE> -<DD> -<A NAME="IDX8"></A> -When set to <SAMP>`on'</SAMP>, readline will try to enable the application -keypad when it is called. Some systems need this to enable the -arrow keys. The default is <SAMP>`off'</SAMP>. - -<DT><CODE>expand-tilde</CODE> -<DD> -<A NAME="IDX9"></A> -If set to <SAMP>`on'</SAMP>, tilde expansion is performed when Readline -attempts word completion. The default is <SAMP>`off'</SAMP>. - -<DT><CODE>horizontal-scroll-mode</CODE> -<DD> -<A NAME="IDX10"></A> -This variable can be set to either <SAMP>`on'</SAMP> or <SAMP>`off'</SAMP>. Setting it -to <SAMP>`on'</SAMP> means that the text of the lines that you edit will scroll -horizontally on a single screen line when they are longer than the width -of the screen, instead of wrapping onto a new screen line. By default, -this variable is set to <SAMP>`off'</SAMP>. - -<DT><CODE>keymap</CODE> -<DD> -<A NAME="IDX11"></A> -Sets Readline's idea of the current keymap for key binding commands. -Acceptable <CODE>keymap</CODE> names are -<CODE>emacs</CODE>, -<CODE>emacs-standard</CODE>, -<CODE>emacs-meta</CODE>, -<CODE>emacs-ctlx</CODE>, -<CODE>vi</CODE>, -<CODE>vi-command</CODE>, and -<CODE>vi-insert</CODE>. -<CODE>vi</CODE> is equivalent to <CODE>vi-command</CODE>; <CODE>emacs</CODE> is -equivalent to <CODE>emacs-standard</CODE>. The default value is <CODE>emacs</CODE>. -The value of the <CODE>editing-mode</CODE> variable also affects the -default keymap. - -<DT><CODE>mark-directories</CODE> -<DD> -If set to <SAMP>`on'</SAMP>, completed directory names have a slash -appended. The default is <SAMP>`on'</SAMP>. - -<DT><CODE>mark-modified-lines</CODE> -<DD> -<A NAME="IDX12"></A> -This variable, when set to <SAMP>`on'</SAMP>, says to display an asterisk -(<SAMP>`*'</SAMP>) at the start of history lines which have been modified. -This variable is <SAMP>`off'</SAMP> by default. - -<DT><CODE>input-meta</CODE> -<DD> -<A NAME="IDX13"></A> -<A NAME="IDX14"></A> -If set to <SAMP>`on'</SAMP>, Readline will enable eight-bit input (it -will not strip the eighth bit from the characters it reads), -regardless of what the terminal claims it can support. The -default value is <SAMP>`off'</SAMP>. The name <CODE>meta-flag</CODE> is a -synonym for this variable. - -<DT><CODE>output-meta</CODE> -<DD> -<A NAME="IDX15"></A> -If set to <SAMP>`on'</SAMP>, Readline will display characters with the -eighth bit set directly rather than as a meta-prefixed escape -sequence. The default is <SAMP>`off'</SAMP>. - -<DT><CODE>show-all-if-ambiguous</CODE> -<DD> -<A NAME="IDX16"></A> -This alters the default behavior of the completion functions. If -set to <SAMP>`on'</SAMP>, -words which have more than one possible completion cause the -matches to be listed immediately instead of ringing the bell. -The default value is <SAMP>`off'</SAMP>. - -<DT><CODE>visible-stats</CODE> -<DD> -<A NAME="IDX17"></A> -If set to <SAMP>`on'</SAMP>, a character denoting a file's type -is appended to the filename when listing possible -completions. The default is <SAMP>`off'</SAMP>. - -</DL> - -<DT>Key Bindings -<DD> -The syntax for controlling key bindings in the init file is -simple. First you have to know the name of the command that you -want to change. The following pages contain tables of the command name, -the default keybinding, and a short description of what the command -does. - -Once you know the name of the command, simply place the name of the key -you wish to bind the command to, a colon, and then the name of the -command on a line in the init file. The name of the key -can be expressed in different ways, depending on which is most -comfortable for you. - -<DL COMPACT> - -<DT><VAR>keyname</VAR>: <VAR>function-name</VAR> or <VAR>macro</VAR> -<DD> -<VAR>keyname</VAR> is the name of a key spelled out in English. For example: - -<PRE> -Control-u: universal-argument -Meta-Rubout: backward-kill-word -Control-o: "> output" -</PRE> - -In the above example, <SAMP>`C-u'</SAMP> is bound to the function -<CODE>universal-argument</CODE>, and <SAMP>`C-o'</SAMP> is bound to run the macro -expressed on the right hand side (that is, to insert the text -<SAMP>`> output'</SAMP> into the line). - -<DT>"<VAR>keyseq</VAR>": <VAR>function-name</VAR> or <VAR>macro</VAR> -<DD> -<VAR>keyseq</VAR> differs from <VAR>keyname</VAR> above in that strings -denoting an entire key sequence can be specified, by placing -the key sequence in double quotes. Some GNU Emacs style key -escapes can be used, as in the following example, but the -special character names are not recognized. - - -<PRE> -"\C-u": universal-argument -"\C-x\C-r": re-read-init-file -"\e[11~": "Function Key 1" -</PRE> - -In the above example, <SAMP>`C-u'</SAMP> is bound to the function -<CODE>universal-argument</CODE> (just as it was in the first example), -<SAMP>`C-x C-r'</SAMP> is bound to the function <CODE>re-read-init-file</CODE>, and -<SAMP>`ESC [ 1 1 ~'</SAMP> is bound to insert the text <SAMP>`Function Key 1'</SAMP>. -The following escape sequences are available when specifying key -sequences: - -<DL COMPACT> - -<DT><CODE><KBD>\C-</KBD></CODE> -<DD> -control prefix -<DT><CODE><KBD>\M-</KBD></CODE> -<DD> -meta prefix -<DT><CODE><KBD>\e</KBD></CODE> -<DD> -an escape character -<DT><CODE><KBD>\\</KBD></CODE> -<DD> -backslash -<DT><CODE><KBD>\"</KBD></CODE> -<DD> -<KBD>"</KBD> -<DT><CODE><KBD>\'</KBD></CODE> -<DD> -<KBD>'</KBD> -</DL> - -When entering the text of a macro, single or double quotes should -be used to indicate a macro definition. Unquoted text -is assumed to be a function name. Backslash -will quote any character in the macro text, including <SAMP>`"'</SAMP> -and <SAMP>`''</SAMP>. -For example, the following binding will make <SAMP>`C-x \'</SAMP> -insert a single <SAMP>`\'</SAMP> into the line: - -<PRE> -"\C-x\\": "\\" -</PRE> - -</DL> -</DL> - - - -<H3><A NAME="SEC5" HREF="readline_toc.html#TOC5">Conditional Init Constructs</A></H3> - -<P> -Readline implements a facility similar in spirit to the conditional -compilation features of the C preprocessor which allows key -bindings and variable settings to be performed as the result -of tests. There are three parser directives used. - -</P> -<DL COMPACT> - -<DT><CODE>$if</CODE> -<DD> -The <CODE>$if</CODE> construct allows bindings to be made based on the -editing mode, the terminal being used, or the application using -Readline. The text of the test extends to the end of the line; -no characters are required to isolate it. - -<DL COMPACT> - -<DT><CODE>mode</CODE> -<DD> -The <CODE>mode=</CODE> form of the <CODE>$if</CODE> directive is used to test -whether Readline is in <CODE>emacs</CODE> or <CODE>vi</CODE> mode. -This may be used in conjunction -with the <SAMP>`set keymap'</SAMP> command, for instance, to set bindings in -the <CODE>emacs-standard</CODE> and <CODE>emacs-ctlx</CODE> keymaps only if -Readline is starting out in <CODE>emacs</CODE> mode. - -<DT><CODE>term</CODE> -<DD> -The <CODE>term=</CODE> form may be used to include terminal-specific -key bindings, perhaps to bind the key sequences output by the -terminal's function keys. The word on the right side of the -<SAMP>`='</SAMP> is tested against the full name of the terminal and the -portion of the terminal name before the first <SAMP>`-'</SAMP>. This -allows <CODE>sun</CODE> to match both <CODE>sun</CODE> and <CODE>sun-cmd</CODE>, -for instance. - -<DT><CODE>application</CODE> -<DD> -The <VAR>application</VAR> construct is used to include -application-specific settings. Each program using the Readline -library sets the <VAR>application name</VAR>, and you can test for it. -This could be used to bind key sequences to functions useful for -a specific program. For instance, the following command adds a -key sequence that quotes the current or previous word in Bash: - -<PRE> -$if Bash -# Quote the current or previous word -"\C-xq": "\eb\"\ef\"" -$endif -</PRE> - -</DL> - -<DT><CODE>$endif</CODE> -<DD> -This command, as you saw in the previous example, terminates an -<CODE>$if</CODE> command. - -<DT><CODE>$else</CODE> -<DD> -Commands in this branch of the <CODE>$if</CODE> directive are executed if -the test fails. -</DL> - - - -<H3><A NAME="SEC6" HREF="readline_toc.html#TOC6">Sample Init File</A></H3> - -<P> -Here is an example of an inputrc file. This illustrates key -binding, variable assignment, and conditional syntax. - -</P> - -<PRE> -# This file controls the behaviour of line input editing for -# programs that use the Gnu Readline library. Existing programs -# include FTP, Bash, and Gdb. -# -# You can re-read the inputrc file with C-x C-r. -# Lines beginning with '#' are comments. -# -# Set various bindings for emacs mode. - -set editing-mode emacs - -$if mode=emacs - -Meta-Control-h: backward-kill-word Text after the function name is ignored - -# -# Arrow keys in keypad mode -# -#"\M-OD": backward-char -#"\M-OC": forward-char -#"\M-OA": previous-history -#"\M-OB": next-history -# -# Arrow keys in ANSI mode -# -"\M-[D": backward-char -"\M-[C": forward-char -"\M-[A": previous-history -"\M-[B": next-history -# -# Arrow keys in 8 bit keypad mode -# -#"\M-\C-OD": backward-char -#"\M-\C-OC": forward-char -#"\M-\C-OA": previous-history -#"\M-\C-OB": next-history -# -# Arrow keys in 8 bit ANSI mode -# -#"\M-\C-[D": backward-char -#"\M-\C-[C": forward-char -#"\M-\C-[A": previous-history -#"\M-\C-[B": next-history - -C-q: quoted-insert - -$endif - -# An old-style binding. This happens to be the default. -TAB: complete - -# Macros that are convenient for shell interaction -$if Bash -# edit the path -"\C-xp": "PATH=${PATH}\e\C-e\C-a\ef\C-f" -# prepare to type a quoted word -- insert open and close double quotes -# and move to just after the open quote -"\C-x\"": "\"\"\C-b" -# insert a backslash (testing backslash escapes in sequences and macros) -"\C-x\\": "\\" -# Quote the current or previous word -"\C-xq": "\eb\"\ef\"" -# Add a binding to refresh the line, which is unbound -"\C-xr": redraw-current-line -# Edit variable on current line. -"\M-\C-v": "\C-a\C-k$\C-y\M-\C-e\C-a\C-y=" -$endif - -# use a visible bell if one is available -set bell-style visible - -# don't strip characters to 7 bits when reading -set input-meta on - -# allow iso-latin1 characters to be inserted rather than converted to -# prefix-meta sequences -set convert-meta off - -# display characters with the eighth bit set directly rather than -# as meta-prefixed characters -set output-meta on - -# if there are more than 150 possible completions for a word, ask the -# user if he wants to see all of them -set completion-query-items 150 - -# For FTP -$if Ftp -"\C-xg": "get \M-?" -"\C-xt": "put \M-?" -"\M-.": yank-last-arg -$endif -</PRE> - - - -<H2><A NAME="SEC7" HREF="readline_toc.html#TOC7">Bindable Readline Commands</A></H2> - -<P> -This section describes Readline commands that may be bound to key -sequences. - -</P> - - -<H3><A NAME="SEC8" HREF="readline_toc.html#TOC8">Commands For Moving</A></H3> -<DL COMPACT> - -<DT><CODE>beginning-of-line (C-a)</CODE> -<DD> -<A NAME="IDX18"></A> -Move to the start of the current line. - -<DT><CODE>end-of-line (C-e)</CODE> -<DD> -<A NAME="IDX19"></A> -Move to the end of the line. - -<DT><CODE>forward-char (C-f)</CODE> -<DD> -<A NAME="IDX20"></A> -Move forward a character. - -<DT><CODE>backward-char (C-b)</CODE> -<DD> -<A NAME="IDX21"></A> -Move back a character. - -<DT><CODE>forward-word (M-f)</CODE> -<DD> -<A NAME="IDX22"></A> -Move forward to the end of the next word. Words are composed of -letters and digits. - -<DT><CODE>backward-word (M-b)</CODE> -<DD> -<A NAME="IDX23"></A> -Move back to the start of this, or the previous, word. Words are -composed of letters and digits. - -<DT><CODE>clear-screen (C-l)</CODE> -<DD> -<A NAME="IDX24"></A> -Clear the screen and redraw the current line, -leaving the current line at the top of the screen. - -<DT><CODE>redraw-current-line ()</CODE> -<DD> -<A NAME="IDX25"></A> -Refresh the current line. By default, this is unbound. - -</DL> - - - -<H3><A NAME="SEC9" HREF="readline_toc.html#TOC9">Commands For Manipulating The History</A></H3> - -<DL COMPACT> - -<DT><CODE>accept-line (Newline, Return)</CODE> -<DD> -<A NAME="IDX26"></A> -Accept the line regardless of where the cursor is. If this line is -non-empty, add it to the history list. If this line was a history -line, then restore the history line to its original state. - -<DT><CODE>previous-history (C-p)</CODE> -<DD> -<A NAME="IDX27"></A> -Move `up' through the history list. - -<DT><CODE>next-history (C-n)</CODE> -<DD> -<A NAME="IDX28"></A> -Move `down' through the history list. - -<DT><CODE>beginning-of-history (M-<)</CODE> -<DD> -<A NAME="IDX29"></A> -Move to the first line in the history. - -<DT><CODE>end-of-history (M->)</CODE> -<DD> -<A NAME="IDX30"></A> -Move to the end of the input history, i.e., the line you are entering. - -<DT><CODE>reverse-search-history (C-r)</CODE> -<DD> -<A NAME="IDX31"></A> -Search backward starting at the current line and moving `up' through -the history as necessary. This is an incremental search. - -<DT><CODE>forward-search-history (C-s)</CODE> -<DD> -<A NAME="IDX32"></A> -Search forward starting at the current line and moving `down' through -the the history as necessary. This is an incremental search. - -<DT><CODE>non-incremental-reverse-search-history (M-p)</CODE> -<DD> -<A NAME="IDX33"></A> -Search backward starting at the current line and moving `up' -through the history as necessary using a non-incremental search -for a string supplied by the user. - -<DT><CODE>non-incremental-forward-search-history (M-n)</CODE> -<DD> -<A NAME="IDX34"></A> -Search forward starting at the current line and moving `down' -through the the history as necessary using a non-incremental search -for a string supplied by the user. - -<DT><CODE>history-search-forward ()</CODE> -<DD> -<A NAME="IDX35"></A> -Search forward through the history for the string of characters -between the start of the current line and the current cursor -position (the `point'). This is a non-incremental search. By -default, this command is unbound. - -<DT><CODE>history-search-backward ()</CODE> -<DD> -<A NAME="IDX36"></A> -Search backward through the history for the string of characters -between the start of the current line and the point. This -is a non-incremental search. By default, this command is unbound. - -<DT><CODE>yank-nth-arg (M-C-y)</CODE> -<DD> -<A NAME="IDX37"></A> -Insert the first argument to the previous command (usually -the second word on the previous line). With an argument <VAR>n</VAR>, -insert the <VAR>n</VAR>th word from the previous command (the words -in the previous command begin with word 0). A negative argument -inserts the <VAR>n</VAR>th word from the end of the previous command. - -<DT><CODE>yank-last-arg (M-., M-_)</CODE> -<DD> -<A NAME="IDX38"></A> -Insert last argument to the previous command (the last word of the -previous history entry). With an -argument, behave exactly like <CODE>yank-nth-arg</CODE>. - -</DL> - - - -<H3><A NAME="SEC10" HREF="readline_toc.html#TOC10">Commands For Changing Text</A></H3> - -<DL COMPACT> - -<DT><CODE>delete-char (C-d)</CODE> -<DD> -<A NAME="IDX39"></A> -Delete the character under the cursor. If the cursor is at the -beginning of the line, there are no characters in the line, and -the last character typed was not <KBD>C-d</KBD>, then return <CODE>EOF</CODE>. - -<DT><CODE>backward-delete-char (Rubout)</CODE> -<DD> -<A NAME="IDX40"></A> -Delete the character behind the cursor. A numeric arg says to kill -the characters instead of deleting them. - -<DT><CODE>quoted-insert (C-q, C-v)</CODE> -<DD> -<A NAME="IDX41"></A> -Add the next character that you type to the line verbatim. This is -how to insert key sequences like <KBD>C-q</KBD>, for example. - -<DT><CODE>tab-insert (M-TAB)</CODE> -<DD> -<A NAME="IDX42"></A> -Insert a tab character. - -<DT><CODE>self-insert (a, b, A, 1, !, ...)</CODE> -<DD> -<A NAME="IDX43"></A> -Insert yourself. - -<DT><CODE>transpose-chars (C-t)</CODE> -<DD> -<A NAME="IDX44"></A> -Drag the character before the cursor forward over -the character at the cursor, moving the -cursor forward as well. If the insertion point -is at the end of the line, then this -transposes the last two characters of the line. -Negative argumentss don't work. - -<DT><CODE>transpose-words (M-t)</CODE> -<DD> -<A NAME="IDX45"></A> -Drag the word behind the cursor past the word in front of the cursor -moving the cursor over that word as well. - -<DT><CODE>upcase-word (M-u)</CODE> -<DD> -<A NAME="IDX46"></A> -Uppercase the current (or following) word. With a negative argument, -do the previous word, but do not move the cursor. - -<DT><CODE>downcase-word (M-l)</CODE> -<DD> -<A NAME="IDX47"></A> -Lowercase the current (or following) word. With a negative argument, -do the previous word, but do not move the cursor. - -<DT><CODE>capitalize-word (M-c)</CODE> -<DD> -<A NAME="IDX48"></A> -Capitalize the current (or following) word. With a negative argument, -do the previous word, but do not move the cursor. - -</DL> - - - -<H3><A NAME="SEC11" HREF="readline_toc.html#TOC11">Killing And Yanking</A></H3> - -<DL COMPACT> - -<DT><CODE>kill-line (C-k)</CODE> -<DD> -<A NAME="IDX49"></A> -Kill the text from the current cursor position to the end of the line. - -<DT><CODE>backward-kill-line (C-x Rubout)</CODE> -<DD> -<A NAME="IDX50"></A> -Kill backward to the beginning of the line. - -<DT><CODE>unix-line-discard (C-u)</CODE> -<DD> -<A NAME="IDX51"></A> -Kill backward from the cursor to the beginning of the current line. -Save the killed text on the kill-ring. - -<DT><CODE>kill-whole-line ()</CODE> -<DD> -<A NAME="IDX52"></A> -Kill all characters on the current line, no matter where the -cursor is. By default, this is unbound. - -<DT><CODE>kill-word (M-d)</CODE> -<DD> -<A NAME="IDX53"></A> -Kill from the cursor to the end of the current word, or if between -words, to the end of the next word. Word boundaries are the same -as <CODE>forward-word</CODE>. - -<DT><CODE>backward-kill-word (M-DEL)</CODE> -<DD> -<A NAME="IDX54"></A> -Kill the word behind the cursor. Word boundaries are the same -as <CODE>backward-word</CODE>. - -<DT><CODE>unix-word-rubout (C-w)</CODE> -<DD> -<A NAME="IDX55"></A> -Kill the word behind the cursor, using white space as a word -boundary. The killed text is saved on the kill-ring. - -<DT><CODE>delete-horizontal-space ()</CODE> -<DD> -<A NAME="IDX56"></A> -Delete all spaces and tabs around point. By default, this is unbound. - -<DT><CODE>kill-region ()</CODE> -<DD> -<A NAME="IDX57"></A> -Kill the text between the point and the <EM>mark</EM> (saved -cursor position. This text is referred to as the <VAR>region</VAR>. -By default, this command is unbound. - -<DT><CODE>copy-region-as-kill ()</CODE> -<DD> -<A NAME="IDX58"></A> -Copy the text in the region to the kill buffer, so you can yank it -right away. By default, this command is unbound. - -<DT><CODE>copy-backward-word ()</CODE> -<DD> -<A NAME="IDX59"></A> -Copy the word before point to the kill buffer. -By default, this command is unbound. - -<DT><CODE>copy-forward-word ()</CODE> -<DD> -<A NAME="IDX60"></A> -Copy the word following point to the kill buffer. -By default, this command is unbound. - -<DT><CODE>yank (C-y)</CODE> -<DD> -<A NAME="IDX61"></A> -Yank the top of the kill ring into the buffer at the current -cursor position. - -<DT><CODE>yank-pop (M-y)</CODE> -<DD> -<A NAME="IDX62"></A> -Rotate the kill-ring, and yank the new top. You can only do this if -the prior command is yank or yank-pop. -</DL> - - - -<H3><A NAME="SEC12" HREF="readline_toc.html#TOC12">Specifying Numeric Arguments</A></H3> -<DL COMPACT> - -<DT><CODE>digit-argument (M-0, M-1, ... M--)</CODE> -<DD> -<A NAME="IDX63"></A> -Add this digit to the argument already accumulating, or start a new -argument. <KBD>M--</KBD> starts a negative argument. - -<DT><CODE>universal-argument ()</CODE> -<DD> -<A NAME="IDX64"></A> -This is another way to specify an argument. -If this command is followed by one or more digits, optionally with a -leading minus sign, those digits define the argument. -If the command is followed by digits, executing <CODE>universal-argument</CODE> -again ends the numeric argument, but is otherwise ignored. -As a special case, if this command is immediately followed by a -character that is neither a digit or minus sign, the argument count -for the next command is multiplied by four. -The argument count is initially one, so executing this function the -first time makes the argument count four, a second time makes the -argument count sixteen, and so on. -By default, this is not bound to a key. -</DL> - - - -<H3><A NAME="SEC13" HREF="readline_toc.html#TOC13">Letting Readline Type For You</A></H3> - -<DL COMPACT> - -<DT><CODE>complete (TAB)</CODE> -<DD> -<A NAME="IDX65"></A> -Attempt to do completion on the text before the cursor. This is -application-specific. Generally, if you are typing a filename -argument, you can do filename completion; if you are typing a command, -you can do command completion, if you are typing in a symbol to GDB, you -can do symbol name completion, if you are typing in a variable to Bash, -you can do variable name completion, and so on. - -<DT><CODE>possible-completions (M-?)</CODE> -<DD> -<A NAME="IDX66"></A> -List the possible completions of the text before the cursor. - -<DT><CODE>insert-completions (M-*)</CODE> -<DD> -<A NAME="IDX67"></A> -Insert all completions of the text before point that would have -been generated by <CODE>possible-completions</CODE>. - -</DL> - - - -<H3><A NAME="SEC14" HREF="readline_toc.html#TOC14">Keyboard Macros</A></H3> -<DL COMPACT> - -<DT><CODE>start-kbd-macro (C-x ()</CODE> -<DD> -<A NAME="IDX68"></A> -Begin saving the characters typed into the current keyboard macro. - -<DT><CODE>end-kbd-macro (C-x ))</CODE> -<DD> -<A NAME="IDX69"></A> -Stop saving the characters typed into the current keyboard macro -and save the definition. - -<DT><CODE>call-last-kbd-macro (C-x e)</CODE> -<DD> -<A NAME="IDX70"></A> -Re-execute the last keyboard macro defined, by making the characters -in the macro appear as if typed at the keyboard. - -</DL> - - - -<H3><A NAME="SEC15" HREF="readline_toc.html#TOC15">Some Miscellaneous Commands</A></H3> -<DL COMPACT> - -<DT><CODE>re-read-init-file (C-x C-r)</CODE> -<DD> -<A NAME="IDX71"></A> -Read in the contents of the inputrc file, and incorporate -any bindings or variable assignments found there. - -<DT><CODE>abort (C-g)</CODE> -<DD> -<A NAME="IDX72"></A> -Abort the current editing command and -ring the terminal's bell (subject to the setting of -<CODE>bell-style</CODE>). - -<DT><CODE>do-uppercase-version (M-a, M-b, M-<VAR>x</VAR>, ...)</CODE> -<DD> -<A NAME="IDX73"></A> -If the metafied character <VAR>x</VAR> is lowercase, run the command -that is bound to the corresponding uppercase character. - -<DT><CODE>prefix-meta (ESC)</CODE> -<DD> -<A NAME="IDX74"></A> -Make the next character that you type be metafied. This is for people -without a meta key. Typing <SAMP>`ESC f'</SAMP> is equivalent to typing -<SAMP>`M-f'</SAMP>. - -<DT><CODE>undo (C-_, C-x C-u)</CODE> -<DD> -<A NAME="IDX75"></A> -Incremental undo, separately remembered for each line. - -<DT><CODE>revert-line (M-r)</CODE> -<DD> -<A NAME="IDX76"></A> -Undo all changes made to this line. This is like typing the <CODE>undo</CODE> -command enough times to get back to the beginning. - -<DT><CODE>tilde-expand (M-~)</CODE> -<DD> -<A NAME="IDX77"></A> -Perform tilde expansion on the current word. - -<DT><CODE>set-mark (C-@)</CODE> -<DD> -<A NAME="IDX78"></A> -Set the mark to the current point. If a -numeric argument is supplied, the mark is set to that position. - -<DT><CODE>exchange-point-and-mark (C-x C-x)</CODE> -<DD> -<A NAME="IDX79"></A> -Swap the point with the mark. The current cursor position is set to -the saved position, and the old cursor position is saved as the mark. - -<DT><CODE>character-search (C-])</CODE> -<DD> -<A NAME="IDX80"></A> -A character is read and point is moved to the next occurrence of that -character. A negative count searches for previous occurrences. - -<DT><CODE>character-search-backward (M-C-])</CODE> -<DD> -<A NAME="IDX81"></A> -A character is read and point is moved to the previous occurrence -of that character. A negative count searches for subsequent -occurrences. - -<DT><CODE>insert-comment (M-#)</CODE> -<DD> -<A NAME="IDX82"></A> -The value of the <CODE>comment-begin</CODE> -variable is inserted at the beginning of the current line, -and the line is accepted as if a newline had been typed. - -<DT><CODE>dump-functions ()</CODE> -<DD> -<A NAME="IDX83"></A> -Print all of the functions and their key bindings to the -readline output stream. If a numeric argument is supplied, -the output is formatted in such a way that it can be made part -of an <VAR>inputrc</VAR> file. This command is unbound by default. - -<DT><CODE>dump-variables ()</CODE> -<DD> -<A NAME="IDX84"></A> -Print all of the settable variables and their values to the -readline output stream. If a numeric argument is supplied, -the output is formatted in such a way that it can be made part -of an <VAR>inputrc</VAR> file. This command is unbound by default. - -<DT><CODE>dump-macros ()</CODE> -<DD> -<A NAME="IDX85"></A> -Print all of the readline key sequences bound to macros and the -strings they ouput. If a numeric argument is supplied, -the output is formatted in such a way that it can be made part -of an <VAR>inputrc</VAR> file. This command is unbound by default. - -</DL> - - - -<H2><A NAME="SEC16" HREF="readline_toc.html#TOC16">Readline vi Mode</A></H2> - -<P> -While the Readline library does not have a full set of <CODE>vi</CODE> -editing functions, it does contain enough to allow simple editing -of the line. The Readline <CODE>vi</CODE> mode behaves as specified in -the POSIX 1003.2 standard. - -</P> -<P> -In order to switch interactively between <CODE>emacs</CODE> and <CODE>vi</CODE> -editing modes, use the command M-C-j (toggle-editing-mode). -The Readline default is <CODE>emacs</CODE> mode. - -</P> -<P> -When you enter a line in <CODE>vi</CODE> mode, you are already placed in -`insertion' mode, as if you had typed an <SAMP>`i'</SAMP>. Pressing <KBD>ESC</KBD> -switches you into `command' mode, where you can edit the text of the -line with the standard <CODE>vi</CODE> movement keys, move to previous -history lines with <SAMP>`k'</SAMP> and subsequent lines with <SAMP>`j'</SAMP>, and -so forth. - -</P> - - - -<H1><A NAME="SEC17" HREF="readline_toc.html#TOC17">Programming with GNU Readline</A></H1> - -<P> -This chapter describes the interface between the GNU Readline Library and -other programs. If you are a programmer, and you wish to include the -features found in GNU Readline -such as completion, line editing, and interactive history manipulation -in your own programs, this section is for you. - -</P> - - - -<H2><A NAME="SEC18" HREF="readline_toc.html#TOC18">Basic Behavior</A></H2> - -<P> -Many programs provide a command line interface, such as <CODE>mail</CODE>, -<CODE>ftp</CODE>, and <CODE>sh</CODE>. For such programs, the default behaviour of -Readline is sufficient. This section describes how to use Readline in -the simplest way possible, perhaps to replace calls in your code to -<CODE>gets()</CODE> or <CODE>fgets ()</CODE>. - -</P> -<P> -<A NAME="IDX86"></A> -<A NAME="IDX87"></A> -The function <CODE>readline ()</CODE> prints a prompt and then reads and returns -a single line of text from the user. The line <CODE>readline</CODE> -returns is allocated with <CODE>malloc ()</CODE>; you should <CODE>free ()</CODE> -the line when you are done with it. The declaration for <CODE>readline</CODE> -in ANSI C is - -</P> - -<PRE> -<CODE>char *readline (char *<VAR>prompt</VAR>);</CODE> -</PRE> - -<P> -So, one might say - -<PRE> -<CODE>char *line = readline ("Enter a line: ");</CODE> -</PRE> - -<P> -in order to read a line of text from the user. -The line returned has the final newline removed, so only the -text remains. - -</P> -<P> -If <CODE>readline</CODE> encounters an <CODE>EOF</CODE> while reading the line, and the -line is empty at that point, then <CODE>(char *)NULL</CODE> is returned. -Otherwise, the line is ended just as if a newline had been typed. - -</P> -<P> -If you want the user to be able to get at the line later, (with -<KBD>C-p</KBD> for example), you must call <CODE>add_history ()</CODE> to save the -line away in a <STRONG>history</STRONG> list of such lines. - -</P> - -<PRE> -<CODE>add_history (line)</CODE>; -</PRE> - -<P> -For full details on the GNU History Library, see the associated manual. - -</P> -<P> -It is preferable to avoid saving empty lines on the history list, since -users rarely have a burning need to reuse a blank line. Here is -a function which usefully replaces the standard <CODE>gets ()</CODE> library -function, and has the advantage of no static buffer to overflow: - -</P> - -<PRE> -/* A static variable for holding the line. */ -static char *line_read = (char *)NULL; - -/* Read a string, and return a pointer to it. Returns NULL on EOF. */ -char * -rl_gets () -{ - /* If the buffer has already been allocated, return the memory - to the free pool. */ - if (line_read) - { - free (line_read); - line_read = (char *)NULL; - } - - /* Get a line from the user. */ - line_read = readline (""); - - /* If the line has any text in it, save it on the history. */ - if (line_read && *line_read) - add_history (line_read); - - return (line_read); -} -</PRE> - -<P> -This function gives the user the default behaviour of <KBD>TAB</KBD> -completion: completion on file names. If you do not want Readline to -complete on filenames, you can change the binding of the <KBD>TAB</KBD> key -with <CODE>rl_bind_key ()</CODE>. - -</P> - -<PRE> -<CODE>int rl_bind_key (int <VAR>key</VAR>, int (*<VAR>function</VAR>)());</CODE> -</PRE> - -<P> -<CODE>rl_bind_key ()</CODE> takes two arguments: <VAR>key</VAR> is the character that -you want to bind, and <VAR>function</VAR> is the address of the function to -call when <VAR>key</VAR> is pressed. Binding <KBD>TAB</KBD> to <CODE>rl_insert ()</CODE> -makes <KBD>TAB</KBD> insert itself. -<CODE>rl_bind_key ()</CODE> returns non-zero if <VAR>key</VAR> is not a valid -ASCII character code (between 0 and 255). - -</P> -<P> -Thus, to disable the default <KBD>TAB</KBD> behavior, the following suffices: - -<PRE> -<CODE>rl_bind_key ('\t', rl_insert);</CODE> -</PRE> - -<P> -This code should be executed once at the start of your program; you -might write a function called <CODE>initialize_readline ()</CODE> which -performs this and other desired initializations, such as installing -custom completers (see section <A HREF="readline.html#SEC34">Custom Completers</A>). - -</P> - - -<H2><A NAME="SEC19" HREF="readline_toc.html#TOC19">Custom Functions</A></H2> - -<P> -Readline provides many functions for manipulating the text of -the line, but it isn't possible to anticipate the needs of all -programs. This section describes the various functions and variables -defined within the Readline library which allow a user program to add -customized functionality to Readline. - -</P> - - - -<H3><A NAME="SEC20" HREF="readline_toc.html#TOC20">The Function Type</A></H3> - -<P> -For readabilty, we declare a new type of object, called -<STRONG>Function</STRONG>. A <CODE>Function</CODE> is a C function which -returns an <CODE>int</CODE>. The type declaration for <CODE>Function</CODE> is: - -</P> -<P> -<CODE>typedef int Function ();</CODE> - -</P> -<P> -The reason for declaring this new type is to make it easier to write -code describing pointers to C functions. Let us say we had a variable -called <VAR>func</VAR> which was a pointer to a function. Instead of the -classic C declaration - -</P> -<P> -<CODE>int (*)()func;</CODE> - -</P> -<P> -we may write - -</P> -<P> -<CODE>Function *func;</CODE> - -</P> -<P> -Similarly, there are - -</P> - -<PRE> -typedef void VFunction (); -typedef char *CPFunction (); and -typedef char **CPPFunction (); -</PRE> - -<P> -for functions returning no value, <CODE>pointer to char</CODE>, and -<CODE>pointer to pointer to char</CODE>, respectively. - -</P> - - -<H3><A NAME="SEC21" HREF="readline_toc.html#TOC21">Writing a New Function</A></H3> - -<P> -In order to write new functions for Readline, you need to know the -calling conventions for keyboard-invoked functions, and the names of the -variables that describe the current state of the line read so far. - -</P> -<P> -The calling sequence for a command <CODE>foo</CODE> looks like - -</P> - -<PRE> -<CODE>foo (int count, int key)</CODE> -</PRE> - -<P> -where <VAR>count</VAR> is the numeric argument (or 1 if defaulted) and -<VAR>key</VAR> is the key that invoked this function. - -</P> -<P> -It is completely up to the function as to what should be done with the -numeric argument. Some functions use it as a repeat count, some -as a flag, and others to choose alternate behavior (refreshing the current -line as opposed to refreshing the screen, for example). Some choose to -ignore it. In general, if a -function uses the numeric argument as a repeat count, it should be able -to do something useful with both negative and positive arguments. -At the very least, it should be aware that it can be passed a -negative argument. - -</P> - - -<H2><A NAME="SEC22" HREF="readline_toc.html#TOC22">Readline Variables</A></H2> - -<P> -These variables are available to function writers. - -</P> -<P> -<DL> -<DT><U>Variable:</U> char * <B>rl_line_buffer</B> -<DD><A NAME="IDX88"></A> -This is the line gathered so far. You are welcome to modify the -contents of the line, but see section <A HREF="readline.html#SEC28">Allowing Undoing</A>. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> int <B>rl_point</B> -<DD><A NAME="IDX89"></A> -The offset of the current cursor position in <CODE>rl_line_buffer</CODE> -(the <EM>point</EM>). -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> int <B>rl_end</B> -<DD><A NAME="IDX90"></A> -The number of characters present in <CODE>rl_line_buffer</CODE>. When -<CODE>rl_point</CODE> is at the end of the line, <CODE>rl_point</CODE> and -<CODE>rl_end</CODE> are equal. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> int <B>rl_mark</B> -<DD><A NAME="IDX91"></A> -The mark (saved position) in the current line. If set, the mark -and point define a <EM>region</EM>. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> int <B>rl_done</B> -<DD><A NAME="IDX92"></A> -Setting this to a non-zero value causes Readline to return the current -line immediately. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> int <B>rl_pending_input</B> -<DD><A NAME="IDX93"></A> -Setting this to a value makes it the next keystroke read. This is a -way to stuff a single character into the input stream. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> char * <B>rl_prompt</B> -<DD><A NAME="IDX94"></A> -The prompt Readline uses. This is set from the argument to -<CODE>readline ()</CODE>, and should not be assigned to directly. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> char * <B>rl_library_version</B> -<DD><A NAME="IDX95"></A> -The version number of this revision of the library. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> char * <B>rl_terminal_name</B> -<DD><A NAME="IDX96"></A> -The terminal type, used for initialization. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> char * <B>rl_readline_name</B> -<DD><A NAME="IDX97"></A> -This variable is set to a unique name by each application using Readline. -The value allows conditional parsing of the inputrc file -(see section <A HREF="readline.html#SEC5">Conditional Init Constructs</A>). -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> FILE * <B>rl_instream</B> -<DD><A NAME="IDX98"></A> -The stdio stream from which Readline reads input. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> FILE * <B>rl_outstream</B> -<DD><A NAME="IDX99"></A> -The stdio stream to which Readline performs output. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> Function * <B>rl_startup_hook</B> -<DD><A NAME="IDX100"></A> -If non-zero, this is the address of a function to call just -before <CODE>readline</CODE> prints the first prompt. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> Function * <B>rl_event_hook</B> -<DD><A NAME="IDX101"></A> -If non-zero, this is the address of a function to call periodically -when readline is waiting for terminal input. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> Function * <B>rl_getc_function</B> -<DD><A NAME="IDX102"></A> -If non-zero, <CODE>readline</CODE> will call indirectly through this pointer -to get a character from the input stream. By default, it is set to -<CODE>rl_getc</CODE>, the default <CODE>readline</CODE> character input function -(see section <A HREF="readline.html#SEC31">Utility Functions</A>). -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> VFunction * <B>rl_redisplay_function</B> -<DD><A NAME="IDX103"></A> -If non-zero, <CODE>readline</CODE> will call indirectly through this pointer -to update the display with the current contents of the editing buffer. -By default, it is set to <CODE>rl_redisplay</CODE>, the default <CODE>readline</CODE> -redisplay function (see section <A HREF="readline.html#SEC29">Redisplay</A>). -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> Keymap <B>rl_executing_keymap</B> -<DD><A NAME="IDX104"></A> -This variable is set to the keymap (see section <A HREF="readline.html#SEC25">Selecting a Keymap</A>) in which the -currently executing readline function was found. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> Keymap <B>rl_binding_keymap</B> -<DD><A NAME="IDX105"></A> -This variable is set to the keymap (see section <A HREF="readline.html#SEC25">Selecting a Keymap</A>) in which the -last key binding occurred. -</DL> - -</P> - - -<H2><A NAME="SEC23" HREF="readline_toc.html#TOC23">Readline Convenience Functions</A></H2> - - - -<H3><A NAME="SEC24" HREF="readline_toc.html#TOC24">Naming a Function</A></H3> - -<P> -The user can dynamically change the bindings of keys while using -Readline. This is done by representing the function with a descriptive -name. The user is able to type the descriptive name when referring to -the function. Thus, in an init file, one might find - -</P> - -<PRE> -Meta-Rubout: backward-kill-word -</PRE> - -<P> -This binds the keystroke <KBD>Meta-Rubout</KBD> to the function -<EM>descriptively</EM> named <CODE>backward-kill-word</CODE>. You, as the -programmer, should bind the functions you write to descriptive names as -well. Readline provides a function for doing that: - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_add_defun</B> <I>(char *name, Function *function, int key)</I> -<DD><A NAME="IDX106"></A> -Add <VAR>name</VAR> to the list of named functions. Make <VAR>function</VAR> be -the function that gets called. If <VAR>key</VAR> is not -1, then bind it to -<VAR>function</VAR> using <CODE>rl_bind_key ()</CODE>. -</DL> - -</P> -<P> -Using this function alone is sufficient for most applications. It is -the recommended way to add a few functions to the default functions that -Readline has built in. If you need to do something other -than adding a function to Readline, you may need to use the -underlying functions described below. - -</P> - - -<H3><A NAME="SEC25" HREF="readline_toc.html#TOC25">Selecting a Keymap</A></H3> - -<P> -Key bindings take place on a <STRONG>keymap</STRONG>. The keymap is the -association between the keys that the user types and the functions that -get run. You can make your own keymaps, copy existing keymaps, and tell -Readline which keymap to use. - -</P> -<P> -<DL> -<DT><U>Function:</U> Keymap <B>rl_make_bare_keymap</B> <I>()</I> -<DD><A NAME="IDX107"></A> -Returns a new, empty keymap. The space for the keymap is allocated with -<CODE>malloc ()</CODE>; you should <CODE>free ()</CODE> it when you are done. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> Keymap <B>rl_copy_keymap</B> <I>(Keymap map)</I> -<DD><A NAME="IDX108"></A> -Return a new keymap which is a copy of <VAR>map</VAR>. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> Keymap <B>rl_make_keymap</B> <I>()</I> -<DD><A NAME="IDX109"></A> -Return a new keymap with the printing characters bound to rl_insert, -the lowercase Meta characters bound to run their equivalents, and -the Meta digits bound to produce numeric arguments. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> void <B>rl_discard_keymap</B> <I>(Keymap keymap)</I> -<DD><A NAME="IDX110"></A> -Free the storage associated with <VAR>keymap</VAR>. -</DL> - -</P> -<P> -Readline has several internal keymaps. These functions allow you to -change which keymap is active. - -</P> -<P> -<DL> -<DT><U>Function:</U> Keymap <B>rl_get_keymap</B> <I>()</I> -<DD><A NAME="IDX111"></A> -Returns the currently active keymap. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> void <B>rl_set_keymap</B> <I>(Keymap keymap)</I> -<DD><A NAME="IDX112"></A> -Makes <VAR>keymap</VAR> the currently active keymap. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> Keymap <B>rl_get_keymap_by_name</B> <I>(char *name)</I> -<DD><A NAME="IDX113"></A> -Return the keymap matching <VAR>name</VAR>. <VAR>name</VAR> is one which would -be supplied in a <CODE>set keymap</CODE> inputrc line (@xref{Readline Init File}). -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> char * <B>rl_get_keymap_name</B> <I>(Keymap keymap)</I> -<DD><A NAME="IDX114"></A> -Return the name matching <VAR>keymap</VAR>. <VAR>name</VAR> is one which would -be supplied in a <CODE>set keymap</CODE> inputrc line (@xref{Readline Init File}). -</DL> - -</P> - - -<H3><A NAME="SEC26" HREF="readline_toc.html#TOC26">Binding Keys</A></H3> - -<P> -You associate keys with functions through the keymap. Readline has -several internal keymaps: <CODE>emacs_standard_keymap</CODE>, -<CODE>emacs_meta_keymap</CODE>, <CODE>emacs_ctlx_keymap</CODE>, -<CODE>vi_movement_keymap</CODE>, and <CODE>vi_insertion_keymap</CODE>. -<CODE>emacs_standard_keymap</CODE> is the default, and the examples in -this manual assume that. - -</P> -<P> -These functions manage key bindings. - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_bind_key</B> <I>(int key, Function *function)</I> -<DD><A NAME="IDX115"></A> -Binds <VAR>key</VAR> to <VAR>function</VAR> in the currently active keymap. -Returns non-zero in the case of an invalid <VAR>key</VAR>. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_bind_key_in_map</B> <I>(int key, Function *function, Keymap map)</I> -<DD><A NAME="IDX116"></A> -Bind <VAR>key</VAR> to <VAR>function</VAR> in <VAR>map</VAR>. Returns non-zero in the case -of an invalid <VAR>key</VAR>. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_unbind_key</B> <I>(int key)</I> -<DD><A NAME="IDX117"></A> -Bind <VAR>key</VAR> to the null function in the currently active keymap. -Returns non-zero in case of error. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_unbind_key_in_map</B> <I>(int key, Keymap map)</I> -<DD><A NAME="IDX118"></A> -Bind <VAR>key</VAR> to the null function in <VAR>map</VAR>. -Returns non-zero in case of error. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_generic_bind</B> <I>(int type, char *keyseq, char *data, Keymap map)</I> -<DD><A NAME="IDX119"></A> -Bind the key sequence represented by the string <VAR>keyseq</VAR> to the arbitrary -pointer <VAR>data</VAR>. <VAR>type</VAR> says what kind of data is pointed to by -<VAR>data</VAR>; this can be a function (<CODE>ISFUNC</CODE>), a macro -(<CODE>ISMACR</CODE>), or a keymap (<CODE>ISKMAP</CODE>). This makes new keymaps as -necessary. The initial keymap in which to do bindings is <VAR>map</VAR>. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_parse_and_bind</B> <I>(char *line)</I> -<DD><A NAME="IDX120"></A> -Parse <VAR>line</VAR> as if it had been read from the <CODE>inputrc</CODE> file and -perform any key bindings and variable assignments found -(@xref{Readline Init File}). -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_read_init_file</B> <I>(char *filename)</I> -<DD><A NAME="IDX121"></A> -Read keybindings and variable assignments from <VAR>filename</VAR> -(@xref{Readline Init File}). -</DL> - -</P> - - -<H3><A NAME="SEC27" HREF="readline_toc.html#TOC27">Associating Function Names and Bindings</A></H3> - -<P> -These functions allow you to find out what keys invoke named functions -and the functions invoked by a particular key sequence. - -</P> -<P> -<DL> -<DT><U>Function:</U> Function * <B>rl_named_function</B> <I>(char *name)</I> -<DD><A NAME="IDX122"></A> -Return the function with name <VAR>name</VAR>. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> Function * <B>rl_function_of_keyseq</B> <I>(char *keyseq, Keymap map, int *type)</I> -<DD><A NAME="IDX123"></A> -Return the function invoked by <VAR>keyseq</VAR> in keymap <VAR>map</VAR>. -If <VAR>map</VAR> is NULL, the current keymap is used. If <VAR>type</VAR> is -not NULL, the type of the object is returned in it (one of <CODE>ISFUNC</CODE>, -<CODE>ISKMAP</CODE>, or <CODE>ISMACR</CODE>). -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> char ** <B>rl_invoking_keyseqs</B> <I>(Function *function)</I> -<DD><A NAME="IDX124"></A> -Return an array of strings representing the key sequences used to -invoke <VAR>function</VAR> in the current keymap. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> char ** <B>rl_invoking_keyseqs_in_map</B> <I>(Function *function, Keymap map)</I> -<DD><A NAME="IDX125"></A> -Return an array of strings representing the key sequences used to -invoke <VAR>function</VAR> in the keymap <VAR>map</VAR>. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> void <B>rl_function_dumper</B> <I>(int readable)</I> -<DD><A NAME="IDX126"></A> -Print the readline function names and the key sequences currently -bound to them to <CODE>rl_outstream</CODE>. If <VAR>readable</VAR> is non-zero, -the list is formatted in such a way that it can be made part of an -<CODE>inputrc</CODE> file and re-read. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> void <B>rl_list_funmap_names</B> <I>()</I> -<DD><A NAME="IDX127"></A> -Print the names of all bindable Readline functions to <CODE>rl_outstream</CODE>. -</DL> - -</P> - - -<H3><A NAME="SEC28" HREF="readline_toc.html#TOC28">Allowing Undoing</A></H3> - -<P> -Supporting the undo command is a painless thing, and makes your -functions much more useful. It is certainly easy to try -something if you know you can undo it. I could use an undo function for -the stock market. - -</P> -<P> -If your function simply inserts text once, or deletes text once, and -uses <CODE>rl_insert_text ()</CODE> or <CODE>rl_delete_text ()</CODE> to do it, then -undoing is already done for you automatically. - -</P> -<P> -If you do multiple insertions or multiple deletions, or any combination -of these operations, you should group them together into one operation. -This is done with <CODE>rl_begin_undo_group ()</CODE> and -<CODE>rl_end_undo_group ()</CODE>. - -</P> -<P> -The types of events that can be undone are: - -</P> - -<PRE> -enum undo_code { UNDO_DELETE, UNDO_INSERT, UNDO_BEGIN, UNDO_END }; -</PRE> - -<P> -Notice that <CODE>UNDO_DELETE</CODE> means to insert some text, and -<CODE>UNDO_INSERT</CODE> means to delete some text. That is, the undo code -tells undo what to undo, not how to undo it. <CODE>UNDO_BEGIN</CODE> and -<CODE>UNDO_END</CODE> are tags added by <CODE>rl_begin_undo_group ()</CODE> and -<CODE>rl_end_undo_group ()</CODE>. - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_begin_undo_group</B> <I>()</I> -<DD><A NAME="IDX128"></A> -Begins saving undo information in a group construct. The undo -information usually comes from calls to <CODE>rl_insert_text ()</CODE> and -<CODE>rl_delete_text ()</CODE>, but could be the result of calls to -<CODE>rl_add_undo ()</CODE>. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_end_undo_group</B> <I>()</I> -<DD><A NAME="IDX129"></A> -Closes the current undo group started with <CODE>rl_begin_undo_group -()</CODE>. There should be one call to <CODE>rl_end_undo_group ()</CODE> -for each call to <CODE>rl_begin_undo_group ()</CODE>. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> void <B>rl_add_undo</B> <I>(enum undo_code what, int start, int end, char *text)</I> -<DD><A NAME="IDX130"></A> -Remember how to undo an event (according to <VAR>what</VAR>). The affected -text runs from <VAR>start</VAR> to <VAR>end</VAR>, and encompasses <VAR>text</VAR>. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> void <B>free_undo_list</B> <I>()</I> -<DD><A NAME="IDX131"></A> -Free the existing undo list. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_do_undo</B> <I>()</I> -<DD><A NAME="IDX132"></A> -Undo the first thing on the undo list. Returns <CODE>0</CODE> if there was -nothing to undo, non-zero if something was undone. -</DL> - -</P> -<P> -Finally, if you neither insert nor delete text, but directly modify the -existing text (e.g., change its case), call <CODE>rl_modifying ()</CODE> -once, just before you modify the text. You must supply the indices of -the text range that you are going to modify. - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_modifying</B> <I>(int start, int end)</I> -<DD><A NAME="IDX133"></A> -Tell Readline to save the text between <VAR>start</VAR> and <VAR>end</VAR> as a -single undo unit. It is assumed that you will subsequently modify -that text. -</DL> - -</P> - - -<H3><A NAME="SEC29" HREF="readline_toc.html#TOC29">Redisplay</A></H3> - -<P> -<DL> -<DT><U>Function:</U> void <B>rl_redisplay</B> <I>()</I> -<DD><A NAME="IDX134"></A> -Change what's displayed on the screen to reflect the current contents -of <CODE>rl_line_buffer</CODE>. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_forced_update_display</B> <I>()</I> -<DD><A NAME="IDX135"></A> -Force the line to be updated and redisplayed, whether or not -Readline thinks the screen display is correct. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_on_new_line</B> <I>()</I> -<DD><A NAME="IDX136"></A> -Tell the update routines that we have moved onto a new (empty) line, -usually after ouputting a newline. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_reset_line_state</B> <I>()</I> -<DD><A NAME="IDX137"></A> -Reset the display state to a clean state and redisplay the current line -starting on a new line. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_message</B> <I>(va_alist)</I> -<DD><A NAME="IDX138"></A> -The arguments are a string as would be supplied to <CODE>printf</CODE>. The -resulting string is displayed in the <STRONG>echo area</STRONG>. The echo area -is also used to display numeric arguments and search strings. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_clear_message</B> <I>()</I> -<DD><A NAME="IDX139"></A> -Clear the message in the echo area. -</DL> - -</P> - - -<H3><A NAME="SEC30" HREF="readline_toc.html#TOC30">Modifying Text</A></H3> - -<P> -<DL> -<DT><U>Function:</U> int <B>rl_insert_text</B> <I>(char *text)</I> -<DD><A NAME="IDX140"></A> -Insert <VAR>text</VAR> into the line at the current cursor position. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_delete_text</B> <I>(int start, int end)</I> -<DD><A NAME="IDX141"></A> -Delete the text between <VAR>start</VAR> and <VAR>end</VAR> in the current line. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> char * <B>rl_copy_text</B> <I>(int start, int end)</I> -<DD><A NAME="IDX142"></A> -Return a copy of the text between <VAR>start</VAR> and <VAR>end</VAR> in -the current line. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_kill_text</B> <I>(int start, int end)</I> -<DD><A NAME="IDX143"></A> -Copy the text between <VAR>start</VAR> and <VAR>end</VAR> in the current line -to the kill ring, appending or prepending to the last kill if the -last command was a kill command. The text is deleted. -If <VAR>start</VAR> is less than <VAR>end</VAR>, -the text is appended, otherwise prepended. If the last command was -not a kill, a new kill ring slot is used. -</DL> - -</P> - - -<H3><A NAME="SEC31" HREF="readline_toc.html#TOC31">Utility Functions</A></H3> - -<P> -<DL> -<DT><U>Function:</U> int <B>rl_read_key</B> <I>()</I> -<DD><A NAME="IDX144"></A> -Return the next character available. This handles input inserted into -the input stream via <VAR>pending input</VAR> (see section <A HREF="readline.html#SEC22">Readline Variables</A>) -and <CODE>rl_stuff_char ()</CODE>, macros, and characters read from the keyboard. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_getc</B> <I>(FILE *)</I> -<DD><A NAME="IDX145"></A> -Return the next character available from the keyboard. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_stuff_char</B> <I>(int c)</I> -<DD><A NAME="IDX146"></A> -Insert <VAR>c</VAR> into the Readline input stream. It will be "read" -before Readline attempts to read characters from the terminal with -<CODE>rl_read_key ()</CODE>. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> rl_extend_line_buffer <B>(int</B> <I>len)</I> -<DD><A NAME="IDX147"></A> -Ensure that <CODE>rl_line_buffer</CODE> has enough space to hold <VAR>len</VAR> -characters, possibly reallocating it if necessary. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_initialize</B> <I>()</I> -<DD><A NAME="IDX148"></A> -Initialize or re-initialize Readline's internal state. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_reset_terminal</B> <I>(char *terminal_name)</I> -<DD><A NAME="IDX149"></A> -Reinitialize Readline's idea of the terminal settings using -<VAR>terminal_name</VAR> as the terminal type (e.g., <CODE>vt100</CODE>). -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>alphabetic</B> <I>(int c)</I> -<DD><A NAME="IDX150"></A> -Return 1 if <VAR>c</VAR> is an alphabetic character. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>numeric</B> <I>(int c)</I> -<DD><A NAME="IDX151"></A> -Return 1 if <VAR>c</VAR> is a numeric character. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>ding</B> <I>()</I> -<DD><A NAME="IDX152"></A> -Ring the terminal bell, obeying the setting of <CODE>bell-style</CODE>. -</DL> - -</P> -<P> -The following are implemented as macros, defined in <CODE>chartypes.h</CODE>. - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>uppercase_p</B> <I>(int c)</I> -<DD><A NAME="IDX153"></A> -Return 1 if <VAR>c</VAR> is an uppercase alphabetic character. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>lowercase_p</B> <I>(int c)</I> -<DD><A NAME="IDX154"></A> -Return 1 if <VAR>c</VAR> is a lowercase alphabetic character. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>digit_p</B> <I>(int c)</I> -<DD><A NAME="IDX155"></A> -Return 1 if <VAR>c</VAR> is a numeric character. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>to_upper</B> <I>(int c)</I> -<DD><A NAME="IDX156"></A> -If <VAR>c</VAR> is a lowercase alphabetic character, return the corresponding -uppercase character. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>to_lower</B> <I>(int c)</I> -<DD><A NAME="IDX157"></A> -If <VAR>c</VAR> is an uppercase alphabetic character, return the corresponding -lowercase character. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>digit_value</B> <I>(int c)</I> -<DD><A NAME="IDX158"></A> -If <VAR>c</VAR> is a number, return the value it represents. -</DL> - -</P> - - -<H3><A NAME="SEC32" HREF="readline_toc.html#TOC32">Alternate Interface</A></H3> - -<P> -An alternate interface is available to plain <CODE>readline()</CODE>. Some -applications need to interleave keyboard I/O with file, device, or -window system I/O, typically by using a main loop to <CODE>select()</CODE> -on various file descriptors. To accomodate this need, readline can -also be invoked as a `callback' function from an event loop. There -are functions available to make this easy. - -</P> -<P> -<DL> -<DT><U>Function:</U> void <B>rl_callback_handler_install</B> <I>(char *prompt, Vfunction *lhandler)</I> -<DD><A NAME="IDX159"></A> -Set up the terminal for readline I/O and display the initial -expanded value of <VAR>prompt</VAR>. Save the value of <VAR>lhandler</VAR> to -use as a callback when a complete line of input has been entered. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> void <B>rl_callback_read_char</B> <I>()</I> -<DD><A NAME="IDX160"></A> -Whenever an application determines that keyboard input is available, it -should call <CODE>rl_callback_read_char()</CODE>, which will read the next -character from the current input source. If that character completes the -line, <CODE>rl_callback_read_char</CODE> will invoke the <VAR>lhandler</VAR> -function saved by <CODE>rl_callback_handler_install</CODE> to process the -line. <CODE>EOF</CODE> is indicated by calling <VAR>lhandler</VAR> with a -<CODE>NULL</CODE> line. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> void <B>rl_callback_handler_remove</B> <I>()</I> -<DD><A NAME="IDX161"></A> -Restore the terminal to its initial state and remove the line handler. -This may be called from within a callback as well as independently. -</DL> - -</P> - - -<H3><A NAME="SEC33" HREF="readline_toc.html#TOC33">An Example</A></H3> - -<P> -Here is a function which changes lowercase characters to their uppercase -equivalents, and uppercase characters to lowercase. If -this function was bound to <SAMP>`M-c'</SAMP>, then typing <SAMP>`M-c'</SAMP> would -change the case of the character under point. Typing <SAMP>`M-1 0 M-c'</SAMP> -would change the case of the following 10 characters, leaving the cursor on -the last character changed. - -</P> - -<PRE> -/* Invert the case of the COUNT following characters. */ -int -invert_case_line (count, key) - int count, key; -{ - register int start, end, i; - - start = rl_point; - - if (rl_point >= rl_end) - return (0); - - if (count < 0) - { - direction = -1; - count = -count; - } - else - direction = 1; - - /* Find the end of the range to modify. */ - end = start + (count * direction); - - /* Force it to be within range. */ - if (end > rl_end) - end = rl_end; - else if (end < 0) - end = 0; - - if (start == end) - return (0); - - if (start > end) - { - int temp = start; - start = end; - end = temp; - } - - /* Tell readline that we are modifying the line, so it will save - the undo information. */ - rl_modifying (start, end); - - for (i = start; i != end; i++) - { - if (uppercase_p (rl_line_buffer[i])) - rl_line_buffer[i] = to_lower (rl_line_buffer[i]); - else if (lowercase_p (rl_line_buffer[i])) - rl_line_buffer[i] = to_upper (rl_line_buffer[i]); - } - /* Move point to on top of the last character changed. */ - rl_point = (direction == 1) ? end - 1 : start; - return (0); -} -</PRE> - - - -<H2><A NAME="SEC34" HREF="readline_toc.html#TOC34">Custom Completers</A></H2> - -<P> -Typically, a program that reads commands from the user has a way of -disambiguating commands and data. If your program is one of these, then -it can provide completion for commands, data, or both. -The following sections describe how your program and Readline -cooperate to provide this service. - -</P> - - - -<H3><A NAME="SEC35" HREF="readline_toc.html#TOC35">How Completing Works</A></H3> - -<P> -In order to complete some text, the full list of possible completions -must be available. That is, it is not possible to accurately -expand a partial word without knowing all of the possible words -which make sense in that context. The Readline library provides -the user interface to completion, and two of the most common -completion functions: filename and username. For completing other types -of text, you must write your own completion function. This section -describes exactly what such functions must do, and provides an example. - -</P> -<P> -There are three major functions used to perform completion: - -</P> - -<OL> -<LI> - -The user-interface function <CODE>rl_complete ()</CODE>. This function is -called with the same arguments as other Readline -functions intended for interactive use: <VAR>count</VAR> and -<VAR>invoking_key</VAR>. It isolates the word to be completed and calls -<CODE>completion_matches ()</CODE> to generate a list of possible completions. -It then either lists the possible completions, inserts the possible -completions, or actually performs the -completion, depending on which behavior is desired. - -<LI> - -The internal function <CODE>completion_matches ()</CODE> uses your -<STRONG>generator</STRONG> function to generate the list of possible matches, and -then returns the array of these matches. You should place the address -of your generator function in <CODE>rl_completion_entry_function</CODE>. - -<LI> - -The generator function is called repeatedly from -<CODE>completion_matches ()</CODE>, returning a string each time. The -arguments to the generator function are <VAR>text</VAR> and <VAR>state</VAR>. -<VAR>text</VAR> is the partial word to be completed. <VAR>state</VAR> is zero the -first time the function is called, allowing the generator to perform -any necessary initialization, and a positive non-zero integer for -each subsequent call. When the generator function returns -<CODE>(char *)NULL</CODE> this signals <CODE>completion_matches ()</CODE> that there are -no more possibilities left. Usually the generator function computes the -list of possible completions when <VAR>state</VAR> is zero, and returns them -one at a time on subsequent calls. Each string the generator function -returns as a match must be allocated with <CODE>malloc()</CODE>; Readline -frees the strings when it has finished with them. - -</OL> - -<P> -<DL> -<DT><U>Function:</U> int <B>rl_complete</B> <I>(int ignore, int invoking_key)</I> -<DD><A NAME="IDX162"></A> -Complete the word at or before point. You have supplied the function -that does the initial simple matching selection algorithm (see -<CODE>completion_matches ()</CODE>). The default is to do filename completion. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> Function * <B>rl_completion_entry_function</B> -<DD><A NAME="IDX163"></A> -This is a pointer to the generator function for <CODE>completion_matches -()</CODE>. If the value of <CODE>rl_completion_entry_function</CODE> is -<CODE>(Function *)NULL</CODE> then the default filename generator function, -<CODE>filename_completion_function ()</CODE>, is used. -</DL> - -</P> - - -<H3><A NAME="SEC36" HREF="readline_toc.html#TOC36">Completion Functions</A></H3> - -<P> -Here is the complete list of callable completion functions present in -Readline. - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_complete_internal</B> <I>(int what_to_do)</I> -<DD><A NAME="IDX164"></A> -Complete the word at or before point. <VAR>what_to_do</VAR> says what to do -with the completion. A value of <SAMP>`?'</SAMP> means list the possible -completions. <SAMP>`TAB'</SAMP> means do standard completion. <SAMP>`*'</SAMP> means -insert all of the possible completions. <SAMP>`!'</SAMP> means to display -all of the possible completions, if there is more than one, as well as -performing partial completion. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_complete</B> <I>(int ignore, int invoking_key)</I> -<DD><A NAME="IDX165"></A> -Complete the word at or before point. You have supplied the function -that does the initial simple matching selection algorithm (see -<CODE>completion_matches ()</CODE> and <CODE>rl_completion_entry_function</CODE>). -The default is to do filename -completion. This calls <CODE>rl_complete_internal ()</CODE> with an -argument depending on <VAR>invoking_key</VAR>. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_possible_completions</B> <I>(int count, int invoking_key))</I> -<DD><A NAME="IDX166"></A> -List the possible completions. See description of <CODE>rl_complete -()</CODE>. This calls <CODE>rl_complete_internal ()</CODE> with an argument of -<SAMP>`?'</SAMP>. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> int <B>rl_insert_completions</B> <I>(int count, int invoking_key))</I> -<DD><A NAME="IDX167"></A> -Insert the list of possible completions into the line, deleting the -partially-completed word. See description of <CODE>rl_complete ()</CODE>. -This calls <CODE>rl_complete_internal ()</CODE> with an argument of <SAMP>`*'</SAMP>. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> char ** <B>completion_matches</B> <I>(char *text, CPFunction *entry_func)</I> -<DD><A NAME="IDX168"></A> -Returns an array of <CODE>(char *)</CODE> which is a list of completions for -<VAR>text</VAR>. If there are no completions, returns <CODE>(char **)NULL</CODE>. -The first entry in the returned array is the substitution for <VAR>text</VAR>. -The remaining entries are the possible completions. The array is -terminated with a <CODE>NULL</CODE> pointer. - -</P> -<P> -<VAR>entry_func</VAR> is a function of two args, and returns a -<CODE>(char *)</CODE>. The first argument is <VAR>text</VAR>. The second is a -state argument; it is zero on the first call, and non-zero on subsequent -calls. <VAR>entry_func</VAR> returns a <CODE>NULL</CODE> pointer to the caller -when there are no more matches. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> char * <B>filename_completion_function</B> <I>(char *text, int state)</I> -<DD><A NAME="IDX169"></A> -A generator function for filename completion in the general case. Note -that completion in Bash is a little different because of all -the pathnames that must be followed when looking up completions for a -command. The Bash source is a useful reference for writing custom -completion functions. -</DL> - -</P> -<P> -<DL> -<DT><U>Function:</U> char * <B>username_completion_function</B> <I>(char *text, int state)</I> -<DD><A NAME="IDX170"></A> -A completion generator for usernames. <VAR>text</VAR> contains a partial -username preceded by a random character (usually <SAMP>`~'</SAMP>). As with all -completion generators, <VAR>state</VAR> is zero on the first call and non-zero -for subsequent calls. -</DL> - -</P> - - -<H3><A NAME="SEC37" HREF="readline_toc.html#TOC37">Completion Variables</A></H3> - -<P> -<DL> -<DT><U>Variable:</U> Function * <B>rl_completion_entry_function</B> -<DD><A NAME="IDX171"></A> -A pointer to the generator function for <CODE>completion_matches ()</CODE>. -<CODE>NULL</CODE> means to use <CODE>filename_entry_function ()</CODE>, the default -filename completer. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> CPPFunction * <B>rl_attempted_completion_function</B> -<DD><A NAME="IDX172"></A> -A pointer to an alternative function to create matches. -The function is called with <VAR>text</VAR>, <VAR>start</VAR>, and <VAR>end</VAR>. -<VAR>start</VAR> and <VAR>end</VAR> are indices in <CODE>rl_line_buffer</CODE> saying -what the boundaries of <VAR>text</VAR> are. If this function exists and -returns <CODE>NULL</CODE>, or if this variable is set to <CODE>NULL</CODE>, then -<CODE>rl_complete ()</CODE> will call the value of -<CODE>rl_completion_entry_function</CODE> to generate matches, otherwise the -array of strings returned will be used. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> CPFunction * <B>rl_filename_quoting_function</B> -<DD><A NAME="IDX173"></A> -A pointer to a function that will quote a filename in an application- -specific fashion. This is called if filename completion is being -attempted and one of the characters in <CODE>rl_filename_quote_characters</CODE> -appears in a completed filename. The function is called with -<VAR>text</VAR>, <VAR>match_type</VAR>, and <VAR>quote_pointer</VAR>. The <VAR>text</VAR> -is the filename to be quoted. The <VAR>match_type</VAR> is either -<CODE>SINGLE_MATCH</CODE>, if there is only one completion match, or -<CODE>MULT_MATCH</CODE>. Some functions use this to decide whether or not to -insert a closing quote character. The <VAR>quote_pointer</VAR> is a pointer -to any opening quote character the user typed. Some functions choose -to reset this character. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> CPFunction * <B>rl_filename_dequoting_function</B> -<DD><A NAME="IDX174"></A> -A pointer to a function that will remove application-specific quoting -characters from a filename before completion is attempted, so those -characters do not interfere with matching the text against names in -the filesystem. It is called with <VAR>text</VAR>, the text of the word -to be dequoted, and <VAR>quote_char</VAR>, which is the quoting character -that delimits the filename (usually <SAMP>`''</SAMP> or <SAMP>`"'</SAMP>). If -<VAR>quote_char</VAR> is zero, the filename was not in an embedded string. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> Function * <B>rl_char_is_quoted_p</B> -<DD><A NAME="IDX175"></A> -A pointer to a function to call that determines whether or not a specific -character in the line buffer is quoted, according to whatever quoting -mechanism the program calling readline uses. The function is called with -two arguments: <VAR>text</VAR>, the text of the line, and <VAR>index</VAR>, the -index of the character in the line. It is used to decide whether a -character found in <CODE>rl_completer_word_break_characters</CODE> should be -used to break words for the completer. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> int <B>rl_completion_query_items</B> -<DD><A NAME="IDX176"></A> -Up to this many items will be displayed in response to a -possible-completions call. After that, we ask the user if she is sure -she wants to see them all. The default value is 100. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> char * <B>rl_basic_word_break_characters</B> -<DD><A NAME="IDX177"></A> -The basic list of characters that signal a break between words for the -completer routine. The default value of this variable is the characters -which break words for completion in Bash, i.e., -<CODE>" \t\n\"\\'`@$><=;|&{("</CODE>. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> char * <B>rl_basic_quote_characters</B> -<DD><A NAME="IDX178"></A> -List of quote characters which can cause a word break. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> char * <B>rl_completer_word_break_characters</B> -<DD><A NAME="IDX179"></A> -The list of characters that signal a break between words for -<CODE>rl_complete_internal ()</CODE>. The default list is the value of -<CODE>rl_basic_word_break_characters</CODE>. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> char * <B>rl_completer_quote_characters</B> -<DD><A NAME="IDX180"></A> -List of characters which can be used to quote a substring of the line. -Completion occurs on the entire substring, and within the substring -<CODE>rl_completer_word_break_characters</CODE> are treated as any other character, -unless they also appear within this list. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> char * <B>rl_filename_quote_characters</B> -<DD><A NAME="IDX181"></A> -A list of characters that cause a filename to be quoted by the completer -when they appear in a completed filename. The default is empty. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> char * <B>rl_special_prefixes</B> -<DD><A NAME="IDX182"></A> -The list of characters that are word break characters, but should be -left in <VAR>text</VAR> when it is passed to the completion function. -Programs can use this to help determine what kind of completing to do. -For instance, Bash sets this variable to "$@" so that it can complete -shell variables and hostnames. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> int <B>rl_completion_append_character</B> -<DD><A NAME="IDX183"></A> -When a single completion alternative matches at the end of the command -line, this character is appended to the inserted completion text. The -default is a space character (<SAMP>` '</SAMP>). Setting this to the null -character (<SAMP>`\0'</SAMP>) prevents anything being appended automatically. -This can be changed in custom completion functions to -provide the "most sensible word separator character" according to -an application-specific command line syntax specification. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> int <B>rl_ignore_completion_duplicates</B> -<DD><A NAME="IDX184"></A> -If non-zero, then disallow duplicates in the matches. Default is 1. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> int <B>rl_filename_completion_desired</B> -<DD><A NAME="IDX185"></A> -Non-zero means that the results of the matches are to be treated as -filenames. This is <EM>always</EM> zero on entry, and can only be changed -within a completion entry generator function. If it is set to a non-zero -value, directory names have a slash appended and Readline attempts to -quote completed filenames if they contain any embedded word break -characters. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> int <B>rl_filename_quoting_desired</B> -<DD><A NAME="IDX186"></A> -Non-zero means that the results of the matches are to be quoted using -double quotes (or an application-specific quoting mechanism) if the -completed filename contains any characters in -<CODE>rl_filename_quote_chars</CODE>. This is <EM>always</EM> non-zero -on entry, and can only be changed within a completion entry generator -function. The quoting is effected via a call to the function pointed to -by <CODE>rl_filename_quoting_function</CODE>. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> int <B>rl_inhibit_completion</B> -<DD><A NAME="IDX187"></A> -If this variable is non-zero, completion is inhibit<ed. The completion -character will be inserted as any other bound to <CODE>self-insert</CODE>. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> Function * <B>rl_ignore_some_completions_function</B> -<DD><A NAME="IDX188"></A> -This function, if defined, is called by the completer when real filename -completion is done, after all the matching names have been generated. -It is passed a <CODE>NULL</CODE> terminated array of matches. -The first element (<CODE>matches[0]</CODE>) is the -maximal substring common to all matches. This function can -re-arrange the list of matches as required, but each element deleted -from the array must be freed. -</DL> - -</P> -<P> -<DL> -<DT><U>Variable:</U> Function * <B>rl_directory_completion_hook</B> -<DD><A NAME="IDX189"></A> -This function, if defined, is allowed to modify the directory portion -of filenames Readline completes. It is called with the address of a -string (the current directory name) as an argument. It could be used -to expand symbolic links or shell variables in pathnames. -</DL> - -</P> - - -<H3><A NAME="SEC38" HREF="readline_toc.html#TOC38">A Short Completion Example</A></H3> - -<P> -Here is a small application demonstrating the use of the GNU Readline -library. It is called <CODE>fileman</CODE>, and the source code resides in -<TT>`examples/fileman.c'</TT>. This sample application provides -completion of command names, line editing features, and access to the -history list. - -</P> - -<PRE> -/* fileman.c -- A tiny application which demonstrates how to use the - GNU Readline library. This application interactively allows users - to manipulate files and their modes. */ - -#include <stdio.h> -#include <sys/types.h> -#include <sys/file.h> -#include <sys/stat.h> -#include <sys/errno.h> - -#include <readline/readline.h> -#include <readline/history.h> - -extern char *getwd (); -extern char *xmalloc (); - -/* The names of functions that actually do the manipulation. */ -int com_list (), com_view (), com_rename (), com_stat (), com_pwd (); -int com_delete (), com_help (), com_cd (), com_quit (); - -/* A structure which contains information on the commands this program - can understand. */ - -typedef struct { - char *name; /* User printable name of the function. */ - Function *func; /* Function to call to do the job. */ - char *doc; /* Documentation for this function. */ -} COMMAND; - -COMMAND commands[] = { - { "cd", com_cd, "Change to directory DIR" }, - { "delete", com_delete, "Delete FILE" }, - { "help", com_help, "Display this text" }, - { "?", com_help, "Synonym for `help'" }, - { "list", com_list, "List files in DIR" }, - { "ls", com_list, "Synonym for `list'" }, - { "pwd", com_pwd, "Print the current working directory" }, - { "quit", com_quit, "Quit using Fileman" }, - { "rename", com_rename, "Rename FILE to NEWNAME" }, - { "stat", com_stat, "Print out statistics on FILE" }, - { "view", com_view, "View the contents of FILE" }, - { (char *)NULL, (Function *)NULL, (char *)NULL } -}; - -/* Forward declarations. */ -char *stripwhite (); -COMMAND *find_command (); - -/* The name of this program, as taken from argv[0]. */ -char *progname; - -/* When non-zero, this global means the user is done using this program. */ -int done; - -char * -dupstr (s) - int s; -{ - char *r; - - r = xmalloc (strlen (s) + 1); - strcpy (r, s); - return (r); -} - -main (argc, argv) - int argc; - char **argv; -{ - char *line, *s; - - progname = argv[0]; - - initialize_readline (); /* Bind our completer. */ - - /* Loop reading and executing lines until the user quits. */ - for ( ; done == 0; ) - { - line = readline ("FileMan: "); - - if (!line) - break; - - /* Remove leading and trailing whitespace from the line. - Then, if there is anything left, add it to the history list - and execute it. */ - s = stripwhite (line); - - if (*s) - { - add_history (s); - execute_line (s); - } - - free (line); - } - exit (0); -} - -/* Execute a command line. */ -int -execute_line (line) - char *line; -{ - register int i; - COMMAND *command; - char *word; - - /* Isolate the command word. */ - i = 0; - while (line[i] && whitespace (line[i])) - i++; - word = line + i; - - while (line[i] && !whitespace (line[i])) - i++; - - if (line[i]) - line[i++] = '\0'; - - command = find_command (word); - - if (!command) - { - fprintf (stderr, "%s: No such command for FileMan.\n", word); - return (-1); - } - - /* Get argument to command, if any. */ - while (whitespace (line[i])) - i++; - - word = line + i; - - /* Call the function. */ - return ((*(command->func)) (word)); -} - -/* Look up NAME as the name of a command, and return a pointer to that - command. Return a NULL pointer if NAME isn't a command name. */ -COMMAND * -find_command (name) - char *name; -{ - register int i; - - for (i = 0; commands[i].name; i++) - if (strcmp (name, commands[i].name) == 0) - return (&commands[i]); - - return ((COMMAND *)NULL); -} - -/* Strip whitespace from the start and end of STRING. Return a pointer - into STRING. */ -char * -stripwhite (string) - char *string; -{ - register char *s, *t; - - for (s = string; whitespace (*s); s++) - ; - - if (*s == 0) - return (s); - - t = s + strlen (s) - 1; - while (t > s && whitespace (*t)) - t--; - *++t = '\0'; - - return s; -} - -/* **************************************************************** */ -/* */ -/* Interface to Readline Completion */ -/* */ -/* **************************************************************** */ - -char *command_generator (); -char **fileman_completion (); - -/* Tell the GNU Readline library how to complete. We want to try to complete - on command names if this is the first word in the line, or on filenames - if not. */ -initialize_readline () -{ - /* Allow conditional parsing of the ~/.inputrc file. */ - rl_readline_name = "FileMan"; - - /* Tell the completer that we want a crack first. */ - rl_attempted_completion_function = (CPPFunction *)fileman_completion; -} - -/* Attempt to complete on the contents of TEXT. START and END bound the - region of rl_line_buffer that contains the word to complete. TEXT is - the word to complete. We can use the entire contents of rl_line_buffer - in case we want to do some simple parsing. Return the array of matches, - or NULL if there aren't any. */ -char ** -fileman_completion (text, start, end) - char *text; - int start, end; -{ - char **matches; - - matches = (char **)NULL; - - /* If this word is at the start of the line, then it is a command - to complete. Otherwise it is the name of a file in the current - directory. */ - if (start == 0) - matches = completion_matches (text, command_generator); - - return (matches); -} - -/* Generator function for command completion. STATE lets us know whether - to start from scratch; without any state (i.e. STATE == 0), then we - start at the top of the list. */ -char * -command_generator (text, state) - char *text; - int state; -{ - static int list_index, len; - char *name; - - /* If this is a new word to complete, initialize now. This includes - saving the length of TEXT for efficiency, and initializing the index - variable to 0. */ - if (!state) - { - list_index = 0; - len = strlen (text); - } - - /* Return the next name which partially matches from the command list. */ - while (name = commands[list_index].name) - { - list_index++; - - if (strncmp (name, text, len) == 0) - return (dupstr(name)); - } - - /* If no names matched, then return NULL. */ - return ((char *)NULL); -} - -/* **************************************************************** */ -/* */ -/* FileMan Commands */ -/* */ -/* **************************************************************** */ - -/* String to pass to system (). This is for the LIST, VIEW and RENAME - commands. */ -static char syscom[1024]; - -/* List the file(s) named in arg. */ -com_list (arg) - char *arg; -{ - if (!arg) - arg = ""; - - sprintf (syscom, "ls -FClg %s", arg); - return (system (syscom)); -} - -com_view (arg) - char *arg; -{ - if (!valid_argument ("view", arg)) - return 1; - - sprintf (syscom, "more %s", arg); - return (system (syscom)); -} - -com_rename (arg) - char *arg; -{ - too_dangerous ("rename"); - return (1); -} - -com_stat (arg) - char *arg; -{ - struct stat finfo; - - if (!valid_argument ("stat", arg)) - return (1); - - if (stat (arg, &finfo) == -1) - { - perror (arg); - return (1); - } - - printf ("Statistics for `%s':\n", arg); - - printf ("%s has %d link%s, and is %d byte%s in length.\n", arg, - finfo.st_nlink, - (finfo.st_nlink == 1) ? "" : "s", - finfo.st_size, - (finfo.st_size == 1) ? "" : "s"); - printf ("Inode Last Change at: %s", ctime (&finfo.st_ctime)); - printf (" Last access at: %s", ctime (&finfo.st_atime)); - printf (" Last modified at: %s", ctime (&finfo.st_mtime)); - return (0); -} - -com_delete (arg) - char *arg; -{ - too_dangerous ("delete"); - return (1); -} - -/* Print out help for ARG, or for all of the commands if ARG is - not present. */ -com_help (arg) - char *arg; -{ - register int i; - int printed = 0; - - for (i = 0; commands[i].name; i++) - { - if (!*arg || (strcmp (arg, commands[i].name) == 0)) - { - printf ("%s\t\t%s.\n", commands[i].name, commands[i].doc); - printed++; - } - } - - if (!printed) - { - printf ("No commands match `%s'. Possibilties are:\n", arg); - - for (i = 0; commands[i].name; i++) - { - /* Print in six columns. */ - if (printed == 6) - { - printed = 0; - printf ("\n"); - } - - printf ("%s\t", commands[i].name); - printed++; - } - - if (printed) - printf ("\n"); - } - return (0); -} - -/* Change to the directory ARG. */ -com_cd (arg) - char *arg; -{ - if (chdir (arg) == -1) - { - perror (arg); - return 1; - } - - com_pwd (""); - return (0); -} - -/* Print out the current working directory. */ -com_pwd (ignore) - char *ignore; -{ - char dir[1024], *s; - - s = getwd (dir); - if (s == 0) - { - printf ("Error getting pwd: %s\n", dir); - return 1; - } - - printf ("Current directory is %s\n", dir); - return 0; -} - -/* The user wishes to quit using this program. Just set DONE non-zero. */ -com_quit (arg) - char *arg; -{ - done = 1; - return (0); -} - -/* Function which tells you that you can't do this. */ -too_dangerous (caller) - char *caller; -{ - fprintf (stderr, - "%s: Too dangerous for me to distribute. Write it yourself.\n", - caller); -} - -/* Return non-zero if ARG is a valid argument for CALLER, else print - an error message and return zero. */ -int -valid_argument (caller, arg) - char *caller, *arg; -{ - if (!arg || !*arg) - { - fprintf (stderr, "%s: Argument required.\n", caller); - return (0); - } - - return (1); -} -</PRE> - - - -<H1><A NAME="SEC39" HREF="readline_toc.html#TOC39">Concept Index</A></H1> -<P> -<H2>i</H2> -<DIR> -<LI><A HREF="readline.html#IDX1">interaction, readline</A> -</DIR> -<H2>r</H2> -<DIR> -<LI><A HREF="readline.html#IDX87">readline, function</A> -</DIR> - -</P> - - -<H1><A NAME="SEC40" HREF="readline_toc.html#TOC40">Function and Variable Index</A></H1> -<P> -<H2>(</H2> -<DIR> -<LI><A HREF="readline.html#IDX147">(int</A> -</DIR> -<H2>a</H2> -<DIR> -<LI><A HREF="readline.html#IDX72">abort (C-g)</A> -<LI><A HREF="readline.html#IDX26">accept-line (Newline, Return)</A> -<LI><A HREF="readline.html#IDX150">alphabetic</A> -</DIR> -<H2>b</H2> -<DIR> -<LI><A HREF="readline.html#IDX21">backward-char (C-b)</A> -<LI><A HREF="readline.html#IDX40">backward-delete-char (Rubout)</A> -<LI><A HREF="readline.html#IDX50">backward-kill-line (C-x Rubout)</A> -<LI><A HREF="readline.html#IDX54">backward-kill-word (M-DEL)</A> -<LI><A HREF="readline.html#IDX23">backward-word (M-b)</A> -<LI><A HREF="readline.html#IDX29">beginning-of-history (M-&#60;)</A> -<LI><A HREF="readline.html#IDX18">beginning-of-line (C-a)</A> -<LI><A HREF="readline.html#IDX2">bell-style</A> -</DIR> -<H2>c</H2> -<DIR> -<LI><A HREF="readline.html#IDX70">call-last-kbd-macro (C-x e)</A> -<LI><A HREF="readline.html#IDX48">capitalize-word (M-c)</A> -<LI><A HREF="readline.html#IDX80">character-search (C-])</A> -<LI><A HREF="readline.html#IDX81">character-search-backward (M-C-])</A> -<LI><A HREF="readline.html#IDX24">clear-screen (C-l)</A> -<LI><A HREF="readline.html#IDX3">comment-begin</A> -<LI><A HREF="readline.html#IDX65">complete (TAB)</A> -<LI><A HREF="readline.html#IDX4">completion-query-items</A> -<LI><A HREF="readline.html#IDX168">completion_matches</A> -<LI><A HREF="readline.html#IDX5">convert-meta</A> -<LI><A HREF="readline.html#IDX59">copy-backward-word ()</A> -<LI><A HREF="readline.html#IDX60">copy-forward-word ()</A> -<LI><A HREF="readline.html#IDX58">copy-region-as-kill ()</A> -</DIR> -<H2>d</H2> -<DIR> -<LI><A HREF="readline.html#IDX39">delete-char (C-d)</A> -<LI><A HREF="readline.html#IDX56">delete-horizontal-space ()</A> -<LI><A HREF="readline.html#IDX63">digit-argument (M-0, M-1, ... M--)</A> -<LI><A HREF="readline.html#IDX155">digit_p</A> -<LI><A HREF="readline.html#IDX158">digit_value</A> -<LI><A HREF="readline.html#IDX152">ding</A> -<LI><A HREF="readline.html#IDX6">disable-completion</A> -<LI><A HREF="readline.html#IDX73">do-uppercase-version (M-a, M-b, M-<VAR>x</VAR>, ...)</A> -<LI><A HREF="readline.html#IDX47">downcase-word (M-l)</A> -<LI><A HREF="readline.html#IDX83">dump-functions ()</A> -<LI><A HREF="readline.html#IDX85">dump-macros ()</A> -<LI><A HREF="readline.html#IDX84">dump-variables ()</A> -</DIR> -<H2>e</H2> -<DIR> -<LI><A HREF="readline.html#IDX7">editing-mode</A> -<LI><A HREF="readline.html#IDX8">enable-keypad</A> -<LI><A HREF="readline.html#IDX69">end-kbd-macro (C-x ))</A> -<LI><A HREF="readline.html#IDX30">end-of-history (M-&#62;)</A> -<LI><A HREF="readline.html#IDX19">end-of-line (C-e)</A> -<LI><A HREF="readline.html#IDX79">exchange-point-and-mark (C-x C-x)</A> -<LI><A HREF="readline.html#IDX9">expand-tilde</A> -</DIR> -<H2>f</H2> -<DIR> -<LI><A HREF="readline.html#IDX169">filename_completion_function</A> -<LI><A HREF="readline.html#IDX20">forward-char (C-f)</A> -<LI><A HREF="readline.html#IDX32">forward-search-history (C-s)</A> -<LI><A HREF="readline.html#IDX22">forward-word (M-f)</A> -<LI><A HREF="readline.html#IDX131">free_undo_list</A> -</DIR> -<H2>h</H2> -<DIR> -<LI><A HREF="readline.html#IDX36">history-search-backward ()</A> -<LI><A HREF="readline.html#IDX35">history-search-forward ()</A> -<LI><A HREF="readline.html#IDX10">horizontal-scroll-mode</A> -</DIR> -<H2>i</H2> -<DIR> -<LI><A HREF="readline.html#IDX13">input-meta</A> -<LI><A HREF="readline.html#IDX82">insert-comment (M-#)</A> -<LI><A HREF="readline.html#IDX67">insert-completions (M-*)</A> -</DIR> -<H2>k</H2> -<DIR> -<LI><A HREF="readline.html#IDX11">keymap</A> -<LI><A HREF="readline.html#IDX49">kill-line (C-k)</A> -<LI><A HREF="readline.html#IDX57">kill-region ()</A> -<LI><A HREF="readline.html#IDX52">kill-whole-line ()</A> -<LI><A HREF="readline.html#IDX53">kill-word (M-d)</A> -</DIR> -<H2>l</H2> -<DIR> -<LI><A HREF="readline.html#IDX154">lowercase_p</A> -</DIR> -<H2>m</H2> -<DIR> -<LI><A HREF="readline.html#IDX12">mark-modified-lines</A> -<LI><A HREF="readline.html#IDX14">meta-flag</A> -</DIR> -<H2>n</H2> -<DIR> -<LI><A HREF="readline.html#IDX28">next-history (C-n)</A> -<LI><A HREF="readline.html#IDX34">non-incremental-forward-search-history (M-n)</A> -<LI><A HREF="readline.html#IDX33">non-incremental-reverse-search-history (M-p)</A> -<LI><A HREF="readline.html#IDX151">numeric</A> -</DIR> -<H2>o</H2> -<DIR> -<LI><A HREF="readline.html#IDX15">output-meta</A> -</DIR> -<H2>p</H2> -<DIR> -<LI><A HREF="readline.html#IDX66">possible-completions (M-?)</A> -<LI><A HREF="readline.html#IDX74">prefix-meta (ESC)</A> -<LI><A HREF="readline.html#IDX27">previous-history (C-p)</A> -</DIR> -<H2>q</H2> -<DIR> -<LI><A HREF="readline.html#IDX41">quoted-insert (C-q, C-v)</A> -</DIR> -<H2>r</H2> -<DIR> -<LI><A HREF="readline.html#IDX71">re-read-init-file (C-x C-r)</A> -<LI><A HREF="readline.html#IDX86">readline</A> -<LI><A HREF="readline.html#IDX25">redraw-current-line ()</A> -<LI><A HREF="readline.html#IDX31">reverse-search-history (C-r)</A> -<LI><A HREF="readline.html#IDX76">revert-line (M-r)</A> -<LI><A HREF="readline.html#IDX106">rl_add_defun</A> -<LI><A HREF="readline.html#IDX130">rl_add_undo</A> -<LI><A HREF="readline.html#IDX172">rl_attempted_completion_function</A> -<LI><A HREF="readline.html#IDX178">rl_basic_quote_characters</A> -<LI><A HREF="readline.html#IDX177">rl_basic_word_break_characters</A> -<LI><A HREF="readline.html#IDX128">rl_begin_undo_group</A> -<LI><A HREF="readline.html#IDX115">rl_bind_key</A> -<LI><A HREF="readline.html#IDX116">rl_bind_key_in_map</A> -<LI><A HREF="readline.html#IDX105">rl_binding_keymap</A> -<LI><A HREF="readline.html#IDX159">rl_callback_handler_install</A> -<LI><A HREF="readline.html#IDX161">rl_callback_handler_remove</A> -<LI><A HREF="readline.html#IDX160">rl_callback_read_char</A> -<LI><A HREF="readline.html#IDX175">rl_char_is_quoted_p</A> -<LI><A HREF="readline.html#IDX139">rl_clear_message</A> -<LI><A HREF="readline.html#IDX162">rl_complete</A>, <A HREF="rlman.html#IDX165">rl_complete</A> -<LI><A HREF="readline.html#IDX164">rl_complete_internal</A> -<LI><A HREF="readline.html#IDX180">rl_completer_quote_characters</A> -<LI><A HREF="readline.html#IDX179">rl_completer_word_break_characters</A> -<LI><A HREF="readline.html#IDX183">rl_completion_append_character</A> -<LI><A HREF="readline.html#IDX163">rl_completion_entry_function</A>, <A HREF="rlman.html#IDX171">rl_completion_entry_function</A> -<LI><A HREF="readline.html#IDX176">rl_completion_query_items</A> -<LI><A HREF="readline.html#IDX108">rl_copy_keymap</A> -<LI><A HREF="readline.html#IDX142">rl_copy_text</A> -<LI><A HREF="readline.html#IDX141">rl_delete_text</A> -<LI><A HREF="readline.html#IDX189">rl_directory_completion_hook</A> -<LI><A HREF="readline.html#IDX110">rl_discard_keymap</A> -<LI><A HREF="readline.html#IDX132">rl_do_undo</A> -<LI><A HREF="readline.html#IDX92">rl_done</A> -<LI><A HREF="readline.html#IDX90">rl_end</A> -<LI><A HREF="readline.html#IDX129">rl_end_undo_group</A> -<LI><A HREF="readline.html#IDX101">rl_event_hook</A> -<LI><A HREF="readline.html#IDX104">rl_executing_keymap</A> -<LI><A HREF="readline.html#IDX185">rl_filename_completion_desired</A> -<LI><A HREF="readline.html#IDX174">rl_filename_dequoting_function</A> -<LI><A HREF="readline.html#IDX181">rl_filename_quote_characters</A> -<LI><A HREF="readline.html#IDX186">rl_filename_quoting_desired</A> -<LI><A HREF="readline.html#IDX173">rl_filename_quoting_function</A> -<LI><A HREF="readline.html#IDX135">rl_forced_update_display</A> -<LI><A HREF="readline.html#IDX126">rl_function_dumper</A> -<LI><A HREF="readline.html#IDX123">rl_function_of_keyseq</A> -<LI><A HREF="readline.html#IDX119">rl_generic_bind</A> -<LI><A HREF="readline.html#IDX111">rl_get_keymap</A> -<LI><A HREF="readline.html#IDX113">rl_get_keymap_by_name</A> -<LI><A HREF="readline.html#IDX114">rl_get_keymap_name</A> -<LI><A HREF="readline.html#IDX145">rl_getc</A> -<LI><A HREF="readline.html#IDX102">rl_getc_function</A> -<LI><A HREF="readline.html#IDX184">rl_ignore_completion_duplicates</A> -<LI><A HREF="readline.html#IDX188">rl_ignore_some_completions_function</A> -<LI><A HREF="readline.html#IDX187">rl_inhibit_completion</A> -<LI><A HREF="readline.html#IDX148">rl_initialize</A> -<LI><A HREF="readline.html#IDX167">rl_insert_completions</A> -<LI><A HREF="readline.html#IDX140">rl_insert_text</A> -<LI><A HREF="readline.html#IDX98">rl_instream</A> -<LI><A HREF="readline.html#IDX124">rl_invoking_keyseqs</A> -<LI><A HREF="readline.html#IDX125">rl_invoking_keyseqs_in_map</A> -<LI><A HREF="readline.html#IDX143">rl_kill_text</A> -<LI><A HREF="readline.html#IDX95">rl_library_version</A> -<LI><A HREF="readline.html#IDX88">rl_line_buffer</A> -<LI><A HREF="readline.html#IDX127">rl_list_funmap_names</A> -<LI><A HREF="readline.html#IDX107">rl_make_bare_keymap</A> -<LI><A HREF="readline.html#IDX109">rl_make_keymap</A> -<LI><A HREF="readline.html#IDX91">rl_mark</A> -<LI><A HREF="readline.html#IDX138">rl_message</A> -<LI><A HREF="readline.html#IDX133">rl_modifying</A> -<LI><A HREF="readline.html#IDX122">rl_named_function</A> -<LI><A HREF="readline.html#IDX136">rl_on_new_line</A> -<LI><A HREF="readline.html#IDX99">rl_outstream</A> -<LI><A HREF="readline.html#IDX120">rl_parse_and_bind</A> -<LI><A HREF="readline.html#IDX93">rl_pending_input</A> -<LI><A HREF="readline.html#IDX89">rl_point</A> -<LI><A HREF="readline.html#IDX166">rl_possible_completions</A> -<LI><A HREF="readline.html#IDX94">rl_prompt</A> -<LI><A HREF="readline.html#IDX121">rl_read_init_file</A> -<LI><A HREF="readline.html#IDX144">rl_read_key</A> -<LI><A HREF="readline.html#IDX97">rl_readline_name</A> -<LI><A HREF="readline.html#IDX134">rl_redisplay</A> -<LI><A HREF="readline.html#IDX103">rl_redisplay_function</A> -<LI><A HREF="readline.html#IDX137">rl_reset_line_state</A> -<LI><A HREF="readline.html#IDX149">rl_reset_terminal</A> -<LI><A HREF="readline.html#IDX112">rl_set_keymap</A> -<LI><A HREF="readline.html#IDX182">rl_special_prefixes</A> -<LI><A HREF="readline.html#IDX100">rl_startup_hook</A> -<LI><A HREF="readline.html#IDX146">rl_stuff_char</A> -<LI><A HREF="readline.html#IDX96">rl_terminal_name</A> -<LI><A HREF="readline.html#IDX117">rl_unbind_key</A> -<LI><A HREF="readline.html#IDX118">rl_unbind_key_in_map</A> -</DIR> -<H2>s</H2> -<DIR> -<LI><A HREF="readline.html#IDX43">self-insert (a, b, A, 1, !, ...)</A> -<LI><A HREF="readline.html#IDX78">set-mark (C-@)</A> -<LI><A HREF="readline.html#IDX16">show-all-if-ambiguous</A> -<LI><A HREF="readline.html#IDX68">start-kbd-macro (C-x ()</A> -</DIR> -<H2>t</H2> -<DIR> -<LI><A HREF="readline.html#IDX42">tab-insert (M-TAB)</A> -<LI><A HREF="readline.html#IDX77">tilde-expand (M-~)</A> -<LI><A HREF="readline.html#IDX157">to_lower</A> -<LI><A HREF="readline.html#IDX156">to_upper</A> -<LI><A HREF="readline.html#IDX44">transpose-chars (C-t)</A> -<LI><A HREF="readline.html#IDX45">transpose-words (M-t)</A> -</DIR> -<H2>u</H2> -<DIR> -<LI><A HREF="readline.html#IDX75">undo (C-_, C-x C-u)</A> -<LI><A HREF="readline.html#IDX64">universal-argument ()</A> -<LI><A HREF="readline.html#IDX51">unix-line-discard (C-u)</A> -<LI><A HREF="readline.html#IDX55">unix-word-rubout (C-w)</A> -<LI><A HREF="readline.html#IDX46">upcase-word (M-u)</A> -<LI><A HREF="readline.html#IDX153">uppercase_p</A> -<LI><A HREF="readline.html#IDX170">username_completion_function</A> -</DIR> -<H2>v</H2> -<DIR> -<LI><A HREF="readline.html#IDX17">visible-stats</A> -</DIR> -<H2>y</H2> -<DIR> -<LI><A HREF="readline.html#IDX61">yank (C-y)</A> -<LI><A HREF="readline.html#IDX38">yank-last-arg (M-., M-_)</A> -<LI><A HREF="readline.html#IDX37">yank-nth-arg (M-C-y)</A> -<LI><A HREF="readline.html#IDX62">yank-pop (M-y)</A> -</DIR> - -</P> -<P><HR><P> -This document was generated on 22 May 1997 using the -<A HREF="http://wwwcn.cern.ch/dci/texi2html/">texi2html</A> -translator version 1.51.</P> -</BODY> -</HTML>
--- a/readline/doc/readline.info Fri Jun 06 22:08:11 1997 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,2766 +0,0 @@ -This is Info file readline.info, produced by Makeinfo-1.55 from the -input file -/usr/homes/chet/src/bash/readline-2.1-beta2/doc/rlman.texinfo. - - This document describes the GNU Readline Library, a utility which -aids in the consistency of user interface across discrete programs that -need to provide a command line interface. - - Copyright (C) 1988, 1991 Free Software Foundation, Inc. - - Permission is granted to make and distribute verbatim copies of this -manual provided the copyright notice and this permission notice pare -preserved on all copies. - - Permission is granted to copy and distribute modified versions of -this manual under the conditions for verbatim copying, provided that -the entire resulting derived work is distributed under the terms of a -permission notice identical to this one. - - Permission is granted to copy and distribute translations of this -manual into another language, under the above conditions for modified -versions, except that this permission notice may be stated in a -translation approved by the Foundation. - - -File: readline.info, Node: Top, Next: Command Line Editing, Prev: (DIR), Up: (DIR) - -GNU Readline Library -******************** - - This document describes the GNU Readline Library, a utility which -aids in the consistency of user interface across discrete programs that -need to provide a command line interface. - -* Menu: - -* Command Line Editing:: GNU Readline User's Manual. -* Programming with GNU Readline:: GNU Readline Programmer's Manual. -* Concept Index:: Index of concepts described in this manual. -* Function and Variable Index:: Index of externally visible functions - and variables. - - -File: readline.info, Node: Command Line Editing, Next: Programming with GNU Readline, Prev: Top, Up: Top - -Command Line Editing -******************** - - This chapter describes the basic features of the GNU command line -editing interface. - -* Menu: - -* Introduction and Notation:: Notation used in this text. -* Readline Interaction:: The minimum set of commands for editing a line. -* Readline Init File:: Customizing Readline from a user's view. -* Bindable Readline Commands:: A description of most of the Readline commands - available for binding -* Readline vi Mode:: A short description of how to make Readline - behave like the vi editor. - - -File: readline.info, Node: Introduction and Notation, Next: Readline Interaction, Up: Command Line Editing - -Introduction to Line Editing -============================ - - The following paragraphs describe the notation used to represent -keystrokes. - - The text C-k is read as `Control-K' and describes the character -produced when the k key is pressed while the Control key is depressed. - - The text M-k is read as `Meta-K' and describes the character -produced when the meta key (if you have one) is depressed, and the k -key is pressed. If you do not have a meta key, the identical keystroke -can be generated by typing ESC first, and then typing k. Either -process is known as "metafying" the k key. - - The text M-C-k is read as `Meta-Control-k' and describes the -character produced by "metafying" C-k. - - In addition, several keys have their own names. Specifically, DEL, -ESC, LFD, SPC, RET, and TAB all stand for themselves when seen in this -text, or in an init file (*note Readline Init File::.). - - -File: readline.info, Node: Readline Interaction, Next: Readline Init File, Prev: Introduction and Notation, Up: Command Line Editing - -Readline Interaction -==================== - - Often during an interactive session you type in a long line of text, -only to notice that the first word on the line is misspelled. The -Readline library gives you a set of commands for manipulating the text -as you type it in, allowing you to just fix your typo, and not forcing -you to retype the majority of the line. Using these editing commands, -you move the cursor to the place that needs correction, and delete or -insert the text of the corrections. Then, when you are satisfied with -the line, you simply press RETURN. You do not have to be at the end of -the line to press RETURN; the entire line is accepted regardless of the -location of the cursor within the line. - -* Menu: - -* Readline Bare Essentials:: The least you need to know about Readline. -* Readline Movement Commands:: Moving about the input line. -* Readline Killing Commands:: How to delete text, and how to get it back! -* Readline Arguments:: Giving numeric arguments to commands. -* Searching:: Searching through previous lines. - - -File: readline.info, Node: Readline Bare Essentials, Next: Readline Movement Commands, Up: Readline Interaction - -Readline Bare Essentials ------------------------- - - In order to enter characters into the line, simply type them. The -typed character appears where the cursor was, and then the cursor moves -one space to the right. If you mistype a character, you can use your -erase character to back up and delete the mistyped character. - - Sometimes you may miss typing a character that you wanted to type, -and not notice your error until you have typed several other -characters. In that case, you can type C-b to move the cursor to the -left, and then correct your mistake. Afterwards, you can move the -cursor to the right with C-f. - - When you add text in the middle of a line, you will notice that -characters to the right of the cursor are `pushed over' to make room -for the text that you have inserted. Likewise, when you delete text -behind the cursor, characters to the right of the cursor are `pulled -back' to fill in the blank space created by the removal of the text. A -list of the basic bare essentials for editing the text of an input line -follows. - -C-b - Move back one character. - -C-f - Move forward one character. - -DEL - Delete the character to the left of the cursor. - -C-d - Delete the character underneath the cursor. - -Printing characters - Insert the character into the line at the cursor. - -C-_ - Undo the last thing that you did. You can undo all the way back - to an empty line. - - -File: readline.info, Node: Readline Movement Commands, Next: Readline Killing Commands, Prev: Readline Bare Essentials, Up: Readline Interaction - -Readline Movement Commands --------------------------- - - The above table describes the most basic possible keystrokes that -you need in order to do editing of the input line. For your -convenience, many other commands have been added in addition to C-b, -C-f, C-d, and DEL. Here are some commands for moving more rapidly -about the line. - -C-a - Move to the start of the line. - -C-e - Move to the end of the line. - -M-f - Move forward a word. - -M-b - Move backward a word. - -C-l - Clear the screen, reprinting the current line at the top. - - Notice how C-f moves forward a character, while M-f moves forward a -word. It is a loose convention that control keystrokes operate on -characters while meta keystrokes operate on words. - - -File: readline.info, Node: Readline Killing Commands, Next: Readline Arguments, Prev: Readline Movement Commands, Up: Readline Interaction - -Readline Killing Commands -------------------------- - - "Killing" text means to delete the text from the line, but to save -it away for later use, usually by "yanking" (re-inserting) it back into -the line. If the description for a command says that it `kills' text, -then you can be sure that you can get the text back in a different (or -the same) place later. - - When you use a kill command, the text is saved in a "kill-ring". -Any number of consecutive kills save all of the killed text together, so -that when you yank it back, you get it all. The kill ring is not line -specific; the text that you killed on a previously typed line is -available to be yanked back later, when you are typing another line. - - Here is the list of commands for killing text. - -C-k - Kill the text from the current cursor position to the end of the - line. - -M-d - Kill from the cursor to the end of the current word, or if between - words, to the end of the next word. - -M-DEL - Kill from the cursor the start of the previous word, or if between - words, to the start of the previous word. - -C-w - Kill from the cursor to the previous whitespace. This is - different than M-DEL because the word boundaries differ. - - And, here is how to "yank" the text back into the line. Yanking -means to copy the most-recently-killed text from the kill buffer. - -C-y - Yank the most recently killed text back into the buffer at the - cursor. - -M-y - Rotate the kill-ring, and yank the new top. You can only do this - if the prior command is C-y or M-y. - - -File: readline.info, Node: Readline Arguments, Next: Searching, Prev: Readline Killing Commands, Up: Readline Interaction - -Readline Arguments ------------------- - - You can pass numeric arguments to Readline commands. Sometimes the -argument acts as a repeat count, other times it is the sign of the -argument that is significant. If you pass a negative argument to a -command which normally acts in a forward direction, that command will -act in a backward direction. For example, to kill text back to the -start of the line, you might type `M-- C-k'. - - The general way to pass numeric arguments to a command is to type -meta digits before the command. If the first `digit' you type is a -minus sign (-), then the sign of the argument will be negative. Once -you have typed one meta digit to get the argument started, you can type -the remainder of the digits, and then the command. For example, to give -the C-d command an argument of 10, you could type `M-1 0 C-d'. - - -File: readline.info, Node: Searching, Prev: Readline Arguments, Up: Readline Interaction - -Searching for Commands in the History -------------------------------------- - - Readline provides commands for searching through the command history -for lines containing a specified string. There are two search modes: -iNCREMENTAL and NON-INCREMENTAL. - - Incremental searches begin before the user has finished typing the -search string. As each character of the search string is typed, -readline displays the next entry from the history matching the string -typed so far. An incremental search requires only as many characters -as needed to find the desired history entry. The Escape character is -used to terminate an incremental search. Control-J will also terminate -the search. Control-G will abort an incremental search and restore the -original line. When the search is terminated, the history entry -containing the search string becomes the current line. To find other -matching entries in the history list, type Control-S or Control-R as -appropriate. This will search backward or forward in the history for -the next entry matching the search string typed so far. Any other key -sequence bound to a readline command will terminate the search and -execute that command. For instance, a `newline' will terminate the -search and accept the line, thereby executing the command from the -history list. - - Non-incremental searches read the entire search string before -starting to search for matching history lines. The search string may be -typed by the user or part of the contents of the current line. - - -File: readline.info, Node: Readline Init File, Next: Bindable Readline Commands, Prev: Readline Interaction, Up: Command Line Editing - -Readline Init File -================== - - Although the Readline library comes with a set of `emacs'-like -keybindings installed by default, it is possible that you would like to -use a different set of keybindings. You can customize programs that -use Readline by putting commands in an "inputrc" file in your home -directory. The name of this file is taken from the value of the -environment variable `INPUTRC'. If that variable is unset, the default -is `~/.inputrc'. - - When a program which uses the Readline library starts up, the init -file is read, and the key bindings are set. - - In addition, the `C-x C-r' command re-reads this init file, thus -incorporating any changes that you might have made to it. - -* Menu: - -* Readline Init File Syntax:: Syntax for the commands in the inputrc file. - -* Conditional Init Constructs:: Conditional key bindings in the inputrc file. - -* Sample Init File:: An example inputrc file. - - -File: readline.info, Node: Readline Init File Syntax, Next: Conditional Init Constructs, Up: Readline Init File - -Readline Init File Syntax -------------------------- - - There are only a few basic constructs allowed in the Readline init -file. Blank lines are ignored. Lines beginning with a `#' are -comments. Lines beginning with a `$' indicate conditional constructs -(*note Conditional Init Constructs::.). Other lines denote variable -settings and key bindings. - -Variable Settings - You can change the state of a few variables in Readline by using - the `set' command within the init file. Here is how you would - specify that you wish to use `vi' line editing commands: - - set editing-mode vi - - Right now, there are only a few variables which can be set; so - few, in fact, that we just list them here: - - `bell-style' - Controls what happens when Readline wants to ring the - terminal bell. If set to `none', Readline never rings the - bell. If set to `visible', Readline uses a visible bell if - one is available. If set to `audible' (the default), - Readline attempts to ring the terminal's bell. - - `comment-begin' - The string to insert at the beginning of the line when the - `insert-comment' command is executed. The default value is - `"#"'. - - `completion-query-items' - The number of possible completions that determines when the - user is asked whether he wants to see the list of - possibilities. If the number of possible completions is - greater than this value, Readline will ask the user whether - or not he wishes to view them; otherwise, they are simply - listed. The default limit is `100'. - - `convert-meta' - If set to `on', Readline will convert characters with the - eigth bit set to an ASCII key sequence by stripping the eigth - bit and prepending an ESC character, converting them to a - meta-prefixed key sequence. The default value is `on'. - - `disable-completion' - If set to `On', readline will inhibit word completion. - Completion characters will be inserted into the line as if - they had been mapped to `self-insert'. The default is `off'. - - `editing-mode' - The `editing-mode' variable controls which editing mode you - are using. By default, Readline starts up in Emacs editing - mode, where the keystrokes are most similar to Emacs. This - variable can be set to either `emacs' or `vi'. - - `enable-keypad' - When set to `on', readline will try to enable the application - keypad when it is called. Some systems need this to enable - the arrow keys. The default is `off'. - - `expand-tilde' - If set to `on', tilde expansion is performed when Readline - attempts word completion. The default is `off'. - - `horizontal-scroll-mode' - This variable can be set to either `on' or `off'. Setting it - to `on' means that the text of the lines that you edit will - scroll horizontally on a single screen line when they are - longer than the width of the screen, instead of wrapping onto - a new screen line. By default, this variable is set to `off'. - - `keymap' - Sets Readline's idea of the current keymap for key binding - commands. Acceptable `keymap' names are `emacs', - `emacs-standard', `emacs-meta', `emacs-ctlx', `vi', - `vi-command', and `vi-insert'. `vi' is equivalent to - `vi-command'; `emacs' is equivalent to `emacs-standard'. The - default value is `emacs'. The value of the `editing-mode' - variable also affects the default keymap. - - `mark-directories' - If set to `on', completed directory names have a slash - appended. The default is `on'. - - `mark-modified-lines' - This variable, when set to `on', says to display an asterisk - (`*') at the start of history lines which have been modified. - This variable is `off' by default. - - `input-meta' - If set to `on', Readline will enable eight-bit input (it will - not strip the eighth bit from the characters it reads), - regardless of what the terminal claims it can support. The - default value is `off'. The name `meta-flag' is a synonym - for this variable. - - `output-meta' - If set to `on', Readline will display characters with the - eighth bit set directly rather than as a meta-prefixed escape - sequence. The default is `off'. - - `show-all-if-ambiguous' - This alters the default behavior of the completion functions. - If set to `on', words which have more than one possible - completion cause the matches to be listed immediately instead - of ringing the bell. The default value is `off'. - - `visible-stats' - If set to `on', a character denoting a file's type is - appended to the filename when listing possible completions. - The default is `off'. - -Key Bindings - The syntax for controlling key bindings in the init file is - simple. First you have to know the name of the command that you - want to change. The following pages contain tables of the command - name, the default keybinding, and a short description of what the - command does. - - Once you know the name of the command, simply place the name of - the key you wish to bind the command to, a colon, and then the - name of the command on a line in the init file. The name of the - key can be expressed in different ways, depending on which is most - comfortable for you. - - KEYNAME: FUNCTION-NAME or MACRO - KEYNAME is the name of a key spelled out in English. For - example: - Control-u: universal-argument - Meta-Rubout: backward-kill-word - Control-o: "> output" - - In the above example, `C-u' is bound to the function - `universal-argument', and `C-o' is bound to run the macro - expressed on the right hand side (that is, to insert the text - `> output' into the line). - - "KEYSEQ": FUNCTION-NAME or MACRO - KEYSEQ differs from KEYNAME above in that strings denoting an - entire key sequence can be specified, by placing the key - sequence in double quotes. Some GNU Emacs style key escapes - can be used, as in the following example, but the special - character names are not recognized. - - "\C-u": universal-argument - "\C-x\C-r": re-read-init-file - "\e[11~": "Function Key 1" - - In the above example, `C-u' is bound to the function - `universal-argument' (just as it was in the first example), - `C-x C-r' is bound to the function `re-read-init-file', and - `ESC [ 1 1 ~' is bound to insert the text `Function Key 1'. - The following escape sequences are available when specifying - key sequences: - - ``\C-'' - control prefix - - ``\M-'' - meta prefix - - ``\e'' - an escape character - - ``\\'' - backslash - - ``\"'' - " - - ``\''' - ' - - When entering the text of a macro, single or double quotes - should be used to indicate a macro definition. Unquoted text - is assumed to be a function name. Backslash will quote any - character in the macro text, including `"' and `''. For - example, the following binding will make `C-x \' insert a - single `\' into the line: - "\C-x\\": "\\" - - -File: readline.info, Node: Conditional Init Constructs, Next: Sample Init File, Prev: Readline Init File Syntax, Up: Readline Init File - -Conditional Init Constructs ---------------------------- - - Readline implements a facility similar in spirit to the conditional -compilation features of the C preprocessor which allows key bindings -and variable settings to be performed as the result of tests. There -are three parser directives used. - -`$if' - The `$if' construct allows bindings to be made based on the - editing mode, the terminal being used, or the application using - Readline. The text of the test extends to the end of the line; no - characters are required to isolate it. - - `mode' - The `mode=' form of the `$if' directive is used to test - whether Readline is in `emacs' or `vi' mode. This may be - used in conjunction with the `set keymap' command, for - instance, to set bindings in the `emacs-standard' and - `emacs-ctlx' keymaps only if Readline is starting out in - `emacs' mode. - - `term' - The `term=' form may be used to include terminal-specific key - bindings, perhaps to bind the key sequences output by the - terminal's function keys. The word on the right side of the - `=' is tested against the full name of the terminal and the - portion of the terminal name before the first `-'. This - allows `sun' to match both `sun' and `sun-cmd', for instance. - - `application' - The APPLICATION construct is used to include - application-specific settings. Each program using the - Readline library sets the APPLICATION NAME, and you can test - for it. This could be used to bind key sequences to - functions useful for a specific program. For instance, the - following command adds a key sequence that quotes the current - or previous word in Bash: - $if Bash - # Quote the current or previous word - "\C-xq": "\eb\"\ef\"" - $endif - -`$endif' - This command, as you saw in the previous example, terminates an - `$if' command. - -`$else' - Commands in this branch of the `$if' directive are executed if the - test fails. - - -File: readline.info, Node: Sample Init File, Prev: Conditional Init Constructs, Up: Readline Init File - -Sample Init File ----------------- - - Here is an example of an inputrc file. This illustrates key -binding, variable assignment, and conditional syntax. - - - # This file controls the behaviour of line input editing for - # programs that use the Gnu Readline library. Existing programs - # include FTP, Bash, and Gdb. - # - # You can re-read the inputrc file with C-x C-r. - # Lines beginning with '#' are comments. - # - # Set various bindings for emacs mode. - - set editing-mode emacs - - $if mode=emacs - - Meta-Control-h: backward-kill-word Text after the function name is ignored - - # - # Arrow keys in keypad mode - # - #"\M-OD": backward-char - #"\M-OC": forward-char - #"\M-OA": previous-history - #"\M-OB": next-history - # - # Arrow keys in ANSI mode - # - "\M-[D": backward-char - "\M-[C": forward-char - "\M-[A": previous-history - "\M-[B": next-history - # - # Arrow keys in 8 bit keypad mode - # - #"\M-\C-OD": backward-char - #"\M-\C-OC": forward-char - #"\M-\C-OA": previous-history - #"\M-\C-OB": next-history - # - # Arrow keys in 8 bit ANSI mode - # - #"\M-\C-[D": backward-char - #"\M-\C-[C": forward-char - #"\M-\C-[A": previous-history - #"\M-\C-[B": next-history - - C-q: quoted-insert - - $endif - - # An old-style binding. This happens to be the default. - TAB: complete - - # Macros that are convenient for shell interaction - $if Bash - # edit the path - "\C-xp": "PATH=${PATH}\e\C-e\C-a\ef\C-f" - # prepare to type a quoted word -- insert open and close double quotes - # and move to just after the open quote - "\C-x\"": "\"\"\C-b" - # insert a backslash (testing backslash escapes in sequences and macros) - "\C-x\\": "\\" - # Quote the current or previous word - "\C-xq": "\eb\"\ef\"" - # Add a binding to refresh the line, which is unbound - "\C-xr": redraw-current-line - # Edit variable on current line. - "\M-\C-v": "\C-a\C-k$\C-y\M-\C-e\C-a\C-y=" - $endif - - # use a visible bell if one is available - set bell-style visible - - # don't strip characters to 7 bits when reading - set input-meta on - - # allow iso-latin1 characters to be inserted rather than converted to - # prefix-meta sequences - set convert-meta off - - # display characters with the eighth bit set directly rather than - # as meta-prefixed characters - set output-meta on - - # if there are more than 150 possible completions for a word, ask the - # user if he wants to see all of them - set completion-query-items 150 - - # For FTP - $if Ftp - "\C-xg": "get \M-?" - "\C-xt": "put \M-?" - "\M-.": yank-last-arg - $endif - - -File: readline.info, Node: Bindable Readline Commands, Next: Readline vi Mode, Prev: Readline Init File, Up: Command Line Editing - -Bindable Readline Commands -========================== - -* Menu: - -* Commands For Moving:: Moving about the line. -* Commands For History:: Getting at previous lines. -* Commands For Text:: Commands for changing text. -* Commands For Killing:: Commands for killing and yanking. -* Numeric Arguments:: Specifying numeric arguments, repeat counts. -* Commands For Completion:: Getting Readline to do the typing for you. -* Keyboard Macros:: Saving and re-executing typed characters -* Miscellaneous Commands:: Other miscellaneous commands. - - This section describes Readline commands that may be bound to key -sequences. - - -File: readline.info, Node: Commands For Moving, Next: Commands For History, Up: Bindable Readline Commands - -Commands For Moving -------------------- - -`beginning-of-line (C-a)' - Move to the start of the current line. - -`end-of-line (C-e)' - Move to the end of the line. - -`forward-char (C-f)' - Move forward a character. - -`backward-char (C-b)' - Move back a character. - -`forward-word (M-f)' - Move forward to the end of the next word. Words are composed of - letters and digits. - -`backward-word (M-b)' - Move back to the start of this, or the previous, word. Words are - composed of letters and digits. - -`clear-screen (C-l)' - Clear the screen and redraw the current line, leaving the current - line at the top of the screen. - -`redraw-current-line ()' - Refresh the current line. By default, this is unbound. - - -File: readline.info, Node: Commands For History, Next: Commands For Text, Prev: Commands For Moving, Up: Bindable Readline Commands - -Commands For Manipulating The History -------------------------------------- - -`accept-line (Newline, Return)' - Accept the line regardless of where the cursor is. If this line is - non-empty, add it to the history list. If this line was a history - line, then restore the history line to its original state. - -`previous-history (C-p)' - Move `up' through the history list. - -`next-history (C-n)' - Move `down' through the history list. - -`beginning-of-history (M-<)' - Move to the first line in the history. - -`end-of-history (M->)' - Move to the end of the input history, i.e., the line you are - entering. - -`reverse-search-history (C-r)' - Search backward starting at the current line and moving `up' - through the history as necessary. This is an incremental search. - -`forward-search-history (C-s)' - Search forward starting at the current line and moving `down' - through the the history as necessary. This is an incremental - search. - -`non-incremental-reverse-search-history (M-p)' - Search backward starting at the current line and moving `up' - through the history as necessary using a non-incremental search - for a string supplied by the user. - -`non-incremental-forward-search-history (M-n)' - Search forward starting at the current line and moving `down' - through the the history as necessary using a non-incremental search - for a string supplied by the user. - -`history-search-forward ()' - Search forward through the history for the string of characters - between the start of the current line and the current cursor - position (the `point'). This is a non-incremental search. By - default, this command is unbound. - -`history-search-backward ()' - Search backward through the history for the string of characters - between the start of the current line and the point. This is a - non-incremental search. By default, this command is unbound. - -`yank-nth-arg (M-C-y)' - Insert the first argument to the previous command (usually the - second word on the previous line). With an argument N, insert the - Nth word from the previous command (the words in the previous - command begin with word 0). A negative argument inserts the Nth - word from the end of the previous command. - -`yank-last-arg (M-., M-_)' - Insert last argument to the previous command (the last word of the - previous history entry). With an argument, behave exactly like - `yank-nth-arg'. - - -File: readline.info, Node: Commands For Text, Next: Commands For Killing, Prev: Commands For History, Up: Bindable Readline Commands - -Commands For Changing Text --------------------------- - -`delete-char (C-d)' - Delete the character under the cursor. If the cursor is at the - beginning of the line, there are no characters in the line, and - the last character typed was not `C-d', then return `EOF'. - -`backward-delete-char (Rubout)' - Delete the character behind the cursor. A numeric arg says to kill - the characters instead of deleting them. - -`quoted-insert (C-q, C-v)' - Add the next character that you type to the line verbatim. This is - how to insert key sequences like C-q, for example. - -`tab-insert (M-TAB)' - Insert a tab character. - -`self-insert (a, b, A, 1, !, ...)' - Insert yourself. - -`transpose-chars (C-t)' - Drag the character before the cursor forward over the character at - the cursor, moving the cursor forward as well. If the insertion - point is at the end of the line, then this transposes the last two - characters of the line. Negative argumentss don't work. - -`transpose-words (M-t)' - Drag the word behind the cursor past the word in front of the - cursor moving the cursor over that word as well. - -`upcase-word (M-u)' - Uppercase the current (or following) word. With a negative - argument, do the previous word, but do not move the cursor. - -`downcase-word (M-l)' - Lowercase the current (or following) word. With a negative - argument, do the previous word, but do not move the cursor. - -`capitalize-word (M-c)' - Capitalize the current (or following) word. With a negative - argument, do the previous word, but do not move the cursor. - - -File: readline.info, Node: Commands For Killing, Next: Numeric Arguments, Prev: Commands For Text, Up: Bindable Readline Commands - -Killing And Yanking -------------------- - -`kill-line (C-k)' - Kill the text from the current cursor position to the end of the - line. - -`backward-kill-line (C-x Rubout)' - Kill backward to the beginning of the line. - -`unix-line-discard (C-u)' - Kill backward from the cursor to the beginning of the current line. - Save the killed text on the kill-ring. - -`kill-whole-line ()' - Kill all characters on the current line, no matter where the - cursor is. By default, this is unbound. - -`kill-word (M-d)' - Kill from the cursor to the end of the current word, or if between - words, to the end of the next word. Word boundaries are the same - as `forward-word'. - -`backward-kill-word (M-DEL)' - Kill the word behind the cursor. Word boundaries are the same as - `backward-word'. - -`unix-word-rubout (C-w)' - Kill the word behind the cursor, using white space as a word - boundary. The killed text is saved on the kill-ring. - -`delete-horizontal-space ()' - Delete all spaces and tabs around point. By default, this is - unbound. - -`kill-region ()' - Kill the text between the point and the *mark* (saved cursor - position. This text is referred to as the REGION. By default, - this command is unbound. - -`copy-region-as-kill ()' - Copy the text in the region to the kill buffer, so you can yank it - right away. By default, this command is unbound. - -`copy-backward-word ()' - Copy the word before point to the kill buffer. By default, this - command is unbound. - -`copy-forward-word ()' - Copy the word following point to the kill buffer. By default, - this command is unbound. - -`yank (C-y)' - Yank the top of the kill ring into the buffer at the current - cursor position. - -`yank-pop (M-y)' - Rotate the kill-ring, and yank the new top. You can only do this - if the prior command is yank or yank-pop. - - -File: readline.info, Node: Numeric Arguments, Next: Commands For Completion, Prev: Commands For Killing, Up: Bindable Readline Commands - -Specifying Numeric Arguments ----------------------------- - -`digit-argument (M-0, M-1, ... M--)' - Add this digit to the argument already accumulating, or start a new - argument. M- starts a negative argument. - -`universal-argument ()' - This is another way to specify an argument. If this command is - followed by one or more digits, optionally with a leading minus - sign, those digits define the argument. If the command is - followed by digits, executing `universal-argument' again ends the - numeric argument, but is otherwise ignored. As a special case, if - this command is immediately followed by a character that is - neither a digit or minus sign, the argument count for the next - command is multiplied by four. The argument count is initially - one, so executing this function the first time makes the argument - count four, a second time makes the argument count sixteen, and so - on. By default, this is not bound to a key. - - -File: readline.info, Node: Commands For Completion, Next: Keyboard Macros, Prev: Numeric Arguments, Up: Bindable Readline Commands - -Letting Readline Type For You ------------------------------ - -`complete (TAB)' - Attempt to do completion on the text before the cursor. This is - application-specific. Generally, if you are typing a filename - argument, you can do filename completion; if you are typing a - command, you can do command completion, if you are typing in a - symbol to GDB, you can do symbol name completion, if you are - typing in a variable to Bash, you can do variable name completion, - and so on. - -`possible-completions (M-?)' - List the possible completions of the text before the cursor. - -`insert-completions (M-*)' - Insert all completions of the text before point that would have - been generated by `possible-completions'. - - -File: readline.info, Node: Keyboard Macros, Next: Miscellaneous Commands, Prev: Commands For Completion, Up: Bindable Readline Commands - -Keyboard Macros ---------------- - -`start-kbd-macro (C-x ()' - Begin saving the characters typed into the current keyboard macro. - -`end-kbd-macro (C-x ))' - Stop saving the characters typed into the current keyboard macro - and save the definition. - -`call-last-kbd-macro (C-x e)' - Re-execute the last keyboard macro defined, by making the - characters in the macro appear as if typed at the keyboard. - - -File: readline.info, Node: Miscellaneous Commands, Prev: Keyboard Macros, Up: Bindable Readline Commands - -Some Miscellaneous Commands ---------------------------- - -`re-read-init-file (C-x C-r)' - Read in the contents of the inputrc file, and incorporate any - bindings or variable assignments found there. - -`abort (C-g)' - Abort the current editing command and ring the terminal's bell - (subject to the setting of `bell-style'). - -`do-uppercase-version (M-a, M-b, M-X, ...)' - If the metafied character X is lowercase, run the command that is - bound to the corresponding uppercase character. - -`prefix-meta (ESC)' - Make the next character that you type be metafied. This is for - people without a meta key. Typing `ESC f' is equivalent to typing - `M-f'. - -`undo (C-_, C-x C-u)' - Incremental undo, separately remembered for each line. - -`revert-line (M-r)' - Undo all changes made to this line. This is like typing the `undo' - command enough times to get back to the beginning. - -`tilde-expand (M-~)' - Perform tilde expansion on the current word. - -`set-mark (C-@)' - Set the mark to the current point. If a numeric argument is - supplied, the mark is set to that position. - -`exchange-point-and-mark (C-x C-x)' - Swap the point with the mark. The current cursor position is set - to the saved position, and the old cursor position is saved as the - mark. - -`character-search (C-])' - A character is read and point is moved to the next occurrence of - that character. A negative count searches for previous - occurrences. - -`character-search-backward (M-C-])' - A character is read and point is moved to the previous occurrence - of that character. A negative count searches for subsequent - occurrences. - -`insert-comment (M-#)' - The value of the `comment-begin' variable is inserted at the - beginning of the current line, and the line is accepted as if a - newline had been typed. - -`dump-functions ()' - Print all of the functions and their key bindings to the readline - output stream. If a numeric argument is supplied, the output is - formatted in such a way that it can be made part of an INPUTRC - file. This command is unbound by default. - -`dump-variables ()' - Print all of the settable variables and their values to the - readline output stream. If a numeric argument is supplied, the - output is formatted in such a way that it can be made part of an - INPUTRC file. This command is unbound by default. - -`dump-macros ()' - Print all of the readline key sequences bound to macros and the - strings they ouput. If a numeric argument is supplied, the output - is formatted in such a way that it can be made part of an INPUTRC - file. This command is unbound by default. - - -File: readline.info, Node: Readline vi Mode, Prev: Bindable Readline Commands, Up: Command Line Editing - -Readline vi Mode -================ - - While the Readline library does not have a full set of `vi' editing -functions, it does contain enough to allow simple editing of the line. -The Readline `vi' mode behaves as specified in the POSIX 1003.2 -standard. - - In order to switch interactively between `emacs' and `vi' editing -modes, use the command M-C-j (toggle-editing-mode). The Readline -default is `emacs' mode. - - When you enter a line in `vi' mode, you are already placed in -`insertion' mode, as if you had typed an `i'. Pressing ESC switches -you into `command' mode, where you can edit the text of the line with -the standard `vi' movement keys, move to previous history lines with -`k' and subsequent lines with `j', and so forth. - - This document describes the GNU Readline Library, a utility for -aiding in the consitency of user interface across discrete programs -that need to provide a command line interface. - - Copyright (C) 1988, 1994, 1996 Free Software Foundation, Inc. - - Permission is granted to make and distribute verbatim copies of this -manual provided the copyright notice and this permission notice pare -preserved on all copies. - - Permission is granted to copy and distribute modified versions of -this manual under the conditions for verbatim copying, provided that -the entire resulting derived work is distributed under the terms of a -permission notice identical to this one. - - Permission is granted to copy and distribute translations of this -manual into another language, under the above conditions for modified -versions, except that this permission notice may be stated in a -translation approved by the Foundation. - - -File: readline.info, Node: Programming with GNU Readline, Next: Concept Index, Prev: Command Line Editing, Up: Top - -Programming with GNU Readline -***************************** - - This chapter describes the interface between the GNU Readline -Library and other programs. If you are a programmer, and you wish to -include the features found in GNU Readline such as completion, line -editing, and interactive history manipulation in your own programs, -this section is for you. - -* Menu: - -* Basic Behavior:: Using the default behavior of Readline. -* Custom Functions:: Adding your own functions to Readline. -* Readline Variables:: Variables accessible to custom - functions. -* Readline Convenience Functions:: Functions which Readline supplies to - aid in writing your own -* Custom Completers:: Supplanting or supplementing Readline's - completion functions. - - -File: readline.info, Node: Basic Behavior, Next: Custom Functions, Up: Programming with GNU Readline - -Basic Behavior -============== - - Many programs provide a command line interface, such as `mail', -`ftp', and `sh'. For such programs, the default behaviour of Readline -is sufficient. This section describes how to use Readline in the -simplest way possible, perhaps to replace calls in your code to -`gets()' or `fgets ()'. - - The function `readline ()' prints a prompt and then reads and returns -a single line of text from the user. The line `readline' returns is -allocated with `malloc ()'; you should `free ()' the line when you are -done with it. The declaration for `readline' in ANSI C is - - `char *readline (char *PROMPT);' - -So, one might say - `char *line = readline ("Enter a line: ");' - -in order to read a line of text from the user. The line returned has -the final newline removed, so only the text remains. - - If `readline' encounters an `EOF' while reading the line, and the -line is empty at that point, then `(char *)NULL' is returned. -Otherwise, the line is ended just as if a newline had been typed. - - If you want the user to be able to get at the line later, (with C-p -for example), you must call `add_history ()' to save the line away in a -"history" list of such lines. - - `add_history (line)'; - -For full details on the GNU History Library, see the associated manual. - - It is preferable to avoid saving empty lines on the history list, -since users rarely have a burning need to reuse a blank line. Here is -a function which usefully replaces the standard `gets ()' library -function, and has the advantage of no static buffer to overflow: - - /* A static variable for holding the line. */ - static char *line_read = (char *)NULL; - - /* Read a string, and return a pointer to it. Returns NULL on EOF. */ - char * - rl_gets () - { - /* If the buffer has already been allocated, return the memory - to the free pool. */ - if (line_read) - { - free (line_read); - line_read = (char *)NULL; - } - - /* Get a line from the user. */ - line_read = readline (""); - - /* If the line has any text in it, save it on the history. */ - if (line_read && *line_read) - add_history (line_read); - - return (line_read); - } - - This function gives the user the default behaviour of TAB -completion: completion on file names. If you do not want Readline to -complete on filenames, you can change the binding of the TAB key with -`rl_bind_key ()'. - - `int rl_bind_key (int KEY, int (*FUNCTION)());' - - `rl_bind_key ()' takes two arguments: KEY is the character that you -want to bind, and FUNCTION is the address of the function to call when -KEY is pressed. Binding TAB to `rl_insert ()' makes TAB insert itself. -`rl_bind_key ()' returns non-zero if KEY is not a valid ASCII character -code (between 0 and 255). - - Thus, to disable the default TAB behavior, the following suffices: - `rl_bind_key ('\t', rl_insert);' - - This code should be executed once at the start of your program; you -might write a function called `initialize_readline ()' which performs -this and other desired initializations, such as installing custom -completers (*note Custom Completers::.). - - -File: readline.info, Node: Custom Functions, Next: Readline Variables, Prev: Basic Behavior, Up: Programming with GNU Readline - -Custom Functions -================ - - Readline provides many functions for manipulating the text of the -line, but it isn't possible to anticipate the needs of all programs. -This section describes the various functions and variables defined -within the Readline library which allow a user program to add -customized functionality to Readline. - -* Menu: - -* The Function Type:: C declarations to make code readable. -* Function Writing:: Variables and calling conventions. - - -File: readline.info, Node: The Function Type, Next: Function Writing, Up: Custom Functions - -The Function Type ------------------ - - For readabilty, we declare a new type of object, called "Function". -A `Function' is a C function which returns an `int'. The type -declaration for `Function' is: - -`typedef int Function ();' - - The reason for declaring this new type is to make it easier to write -code describing pointers to C functions. Let us say we had a variable -called FUNC which was a pointer to a function. Instead of the classic -C declaration - - `int (*)()func;' - -we may write - - `Function *func;' - -Similarly, there are - - typedef void VFunction (); - typedef char *CPFunction (); and - typedef char **CPPFunction (); - -for functions returning no value, `pointer to char', and `pointer to -pointer to char', respectively. - - -File: readline.info, Node: Function Writing, Prev: The Function Type, Up: Custom Functions - -Writing a New Function ----------------------- - - In order to write new functions for Readline, you need to know the -calling conventions for keyboard-invoked functions, and the names of the -variables that describe the current state of the line read so far. - - The calling sequence for a command `foo' looks like - - `foo (int count, int key)' - -where COUNT is the numeric argument (or 1 if defaulted) and KEY is the -key that invoked this function. - - It is completely up to the function as to what should be done with -the numeric argument. Some functions use it as a repeat count, some as -a flag, and others to choose alternate behavior (refreshing the current -line as opposed to refreshing the screen, for example). Some choose to -ignore it. In general, if a function uses the numeric argument as a -repeat count, it should be able to do something useful with both -negative and positive arguments. At the very least, it should be aware -that it can be passed a negative argument. - - -File: readline.info, Node: Readline Variables, Next: Readline Convenience Functions, Prev: Custom Functions, Up: Programming with GNU Readline - -Readline Variables -================== - - These variables are available to function writers. - - - Variable: char * rl_line_buffer - This is the line gathered so far. You are welcome to modify the - contents of the line, but see *Note Allowing Undoing::. - - - Variable: int rl_point - The offset of the current cursor position in `rl_line_buffer' (the - *point*). - - - Variable: int rl_end - The number of characters present in `rl_line_buffer'. When - `rl_point' is at the end of the line, `rl_point' and `rl_end' are - equal. - - - Variable: int rl_mark - The mark (saved position) in the current line. If set, the mark - and point define a *region*. - - - Variable: int rl_done - Setting this to a non-zero value causes Readline to return the - current line immediately. - - - Variable: int rl_pending_input - Setting this to a value makes it the next keystroke read. This is - a way to stuff a single character into the input stream. - - - Variable: char * rl_prompt - The prompt Readline uses. This is set from the argument to - `readline ()', and should not be assigned to directly. - - - Variable: char * rl_library_version - The version number of this revision of the library. - - - Variable: char * rl_terminal_name - The terminal type, used for initialization. - - - Variable: char * rl_readline_name - This variable is set to a unique name by each application using - Readline. The value allows conditional parsing of the inputrc file - (*note Conditional Init Constructs::.). - - - Variable: FILE * rl_instream - The stdio stream from which Readline reads input. - - - Variable: FILE * rl_outstream - The stdio stream to which Readline performs output. - - - Variable: Function * rl_startup_hook - If non-zero, this is the address of a function to call just before - `readline' prints the first prompt. - - - Variable: Function * rl_event_hook - If non-zero, this is the address of a function to call periodically - when readline is waiting for terminal input. - - - Variable: Function * rl_getc_function - If non-zero, `readline' will call indirectly through this pointer - to get a character from the input stream. By default, it is set to - `rl_getc', the default `readline' character input function (*note - Utility Functions::.). - - - Variable: VFunction * rl_redisplay_function - If non-zero, `readline' will call indirectly through this pointer - to update the display with the current contents of the editing - buffer. By default, it is set to `rl_redisplay', the default - `readline' redisplay function (*note Redisplay::.). - - - Variable: Keymap rl_executing_keymap - This variable is set to the keymap (*note Keymaps::.) in which the - currently executing readline function was found. - - - Variable: Keymap rl_binding_keymap - This variable is set to the keymap (*note Keymaps::.) in which the - last key binding occurred. - - -File: readline.info, Node: Readline Convenience Functions, Next: Custom Completers, Prev: Readline Variables, Up: Programming with GNU Readline - -Readline Convenience Functions -============================== - -* Menu: - -* Function Naming:: How to give a function you write a name. -* Keymaps:: Making keymaps. -* Binding Keys:: Changing Keymaps. -* Associating Function Names and Bindings:: Translate function names to - key sequences. -* Allowing Undoing:: How to make your functions undoable. -* Redisplay:: Functions to control line display. -* Modifying Text:: Functions to modify `rl_line_buffer'. -* Utility Functions:: Generally useful functions and hooks. -* Alternate Interface:: Using Readline in a `callback' fashion. - - -File: readline.info, Node: Function Naming, Next: Keymaps, Up: Readline Convenience Functions - -Naming a Function ------------------ - - The user can dynamically change the bindings of keys while using -Readline. This is done by representing the function with a descriptive -name. The user is able to type the descriptive name when referring to -the function. Thus, in an init file, one might find - - Meta-Rubout: backward-kill-word - - This binds the keystroke Meta-Rubout to the function *descriptively* -named `backward-kill-word'. You, as the programmer, should bind the -functions you write to descriptive names as well. Readline provides a -function for doing that: - - - Function: int rl_add_defun (char *name, Function *function, int key) - Add NAME to the list of named functions. Make FUNCTION be the - function that gets called. If KEY is not -1, then bind it to - FUNCTION using `rl_bind_key ()'. - - Using this function alone is sufficient for most applications. It is -the recommended way to add a few functions to the default functions that -Readline has built in. If you need to do something other than adding a -function to Readline, you may need to use the underlying functions -described below. - - -File: readline.info, Node: Keymaps, Next: Binding Keys, Prev: Function Naming, Up: Readline Convenience Functions - -Selecting a Keymap ------------------- - - Key bindings take place on a "keymap". The keymap is the -association between the keys that the user types and the functions that -get run. You can make your own keymaps, copy existing keymaps, and tell -Readline which keymap to use. - - - Function: Keymap rl_make_bare_keymap () - Returns a new, empty keymap. The space for the keymap is - allocated with `malloc ()'; you should `free ()' it when you are - done. - - - Function: Keymap rl_copy_keymap (Keymap map) - Return a new keymap which is a copy of MAP. - - - Function: Keymap rl_make_keymap () - Return a new keymap with the printing characters bound to - rl_insert, the lowercase Meta characters bound to run their - equivalents, and the Meta digits bound to produce numeric - arguments. - - - Function: void rl_discard_keymap (Keymap keymap) - Free the storage associated with KEYMAP. - - Readline has several internal keymaps. These functions allow you to -change which keymap is active. - - - Function: Keymap rl_get_keymap () - Returns the currently active keymap. - - - Function: void rl_set_keymap (Keymap keymap) - Makes KEYMAP the currently active keymap. - - - Function: Keymap rl_get_keymap_by_name (char *name) - Return the keymap matching NAME. NAME is one which would be - supplied in a `set keymap' inputrc line (*note Readline Init - File::.). - - - Function: char * rl_get_keymap_name (Keymap keymap) - Return the name matching KEYMAP. NAME is one which would be - supplied in a `set keymap' inputrc line (*note Readline Init - File::.). - - -File: readline.info, Node: Binding Keys, Next: Associating Function Names and Bindings, Prev: Keymaps, Up: Readline Convenience Functions - -Binding Keys ------------- - - You associate keys with functions through the keymap. Readline has -several internal keymaps: `emacs_standard_keymap', `emacs_meta_keymap', -`emacs_ctlx_keymap', `vi_movement_keymap', and `vi_insertion_keymap'. -`emacs_standard_keymap' is the default, and the examples in this manual -assume that. - - These functions manage key bindings. - - - Function: int rl_bind_key (int key, Function *function) - Binds KEY to FUNCTION in the currently active keymap. Returns - non-zero in the case of an invalid KEY. - - - Function: int rl_bind_key_in_map (int key, Function *function, - Keymap map) - Bind KEY to FUNCTION in MAP. Returns non-zero in the case of an - invalid KEY. - - - Function: int rl_unbind_key (int key) - Bind KEY to the null function in the currently active keymap. - Returns non-zero in case of error. - - - Function: int rl_unbind_key_in_map (int key, Keymap map) - Bind KEY to the null function in MAP. Returns non-zero in case of - error. - - - Function: int rl_generic_bind (int type, char *keyseq, char *data, - Keymap map) - Bind the key sequence represented by the string KEYSEQ to the - arbitrary pointer DATA. TYPE says what kind of data is pointed to - by DATA; this can be a function (`ISFUNC'), a macro (`ISMACR'), or - a keymap (`ISKMAP'). This makes new keymaps as necessary. The - initial keymap in which to do bindings is MAP. - - - Function: int rl_parse_and_bind (char *line) - Parse LINE as if it had been read from the `inputrc' file and - perform any key bindings and variable assignments found (*note - Readline Init File::.). - - - Function: int rl_read_init_file (char *filename) - Read keybindings and variable assignments from FILENAME (*note - Readline Init File::.). - - -File: readline.info, Node: Associating Function Names and Bindings, Next: Allowing Undoing, Prev: Binding Keys, Up: Readline Convenience Functions - -Associating Function Names and Bindings ---------------------------------------- - - These functions allow you to find out what keys invoke named -functions and the functions invoked by a particular key sequence. - - - Function: Function * rl_named_function (char *name) - Return the function with name NAME. - - - Function: Function * rl_function_of_keyseq (char *keyseq, Keymap - map, int *type) - Return the function invoked by KEYSEQ in keymap MAP. If MAP is - NULL, the current keymap is used. If TYPE is not NULL, the type - of the object is returned in it (one of `ISFUNC', `ISKMAP', or - `ISMACR'). - - - Function: char ** rl_invoking_keyseqs (Function *function) - Return an array of strings representing the key sequences used to - invoke FUNCTION in the current keymap. - - - Function: char ** rl_invoking_keyseqs_in_map (Function *function, - Keymap map) - Return an array of strings representing the key sequences used to - invoke FUNCTION in the keymap MAP. - - - Function: void rl_function_dumper (int readable) - Print the readline function names and the key sequences currently - bound to them to `rl_outstream'. If READABLE is non-zero, the - list is formatted in such a way that it can be made part of an - `inputrc' file and re-read. - - - Function: void rl_list_funmap_names () - Print the names of all bindable Readline functions to - `rl_outstream'. - - -File: readline.info, Node: Allowing Undoing, Next: Redisplay, Prev: Associating Function Names and Bindings, Up: Readline Convenience Functions - -Allowing Undoing ----------------- - - Supporting the undo command is a painless thing, and makes your -functions much more useful. It is certainly easy to try something if -you know you can undo it. I could use an undo function for the stock -market. - - If your function simply inserts text once, or deletes text once, and -uses `rl_insert_text ()' or `rl_delete_text ()' to do it, then undoing -is already done for you automatically. - - If you do multiple insertions or multiple deletions, or any -combination of these operations, you should group them together into -one operation. This is done with `rl_begin_undo_group ()' and -`rl_end_undo_group ()'. - - The types of events that can be undone are: - - enum undo_code { UNDO_DELETE, UNDO_INSERT, UNDO_BEGIN, UNDO_END }; - - Notice that `UNDO_DELETE' means to insert some text, and -`UNDO_INSERT' means to delete some text. That is, the undo code tells -undo what to undo, not how to undo it. `UNDO_BEGIN' and `UNDO_END' are -tags added by `rl_begin_undo_group ()' and `rl_end_undo_group ()'. - - - Function: int rl_begin_undo_group () - Begins saving undo information in a group construct. The undo - information usually comes from calls to `rl_insert_text ()' and - `rl_delete_text ()', but could be the result of calls to - `rl_add_undo ()'. - - - Function: int rl_end_undo_group () - Closes the current undo group started with `rl_begin_undo_group - ()'. There should be one call to `rl_end_undo_group ()' for each - call to `rl_begin_undo_group ()'. - - - Function: void rl_add_undo (enum undo_code what, int start, int end, - char *text) - Remember how to undo an event (according to WHAT). The affected - text runs from START to END, and encompasses TEXT. - - - Function: void free_undo_list () - Free the existing undo list. - - - Function: int rl_do_undo () - Undo the first thing on the undo list. Returns `0' if there was - nothing to undo, non-zero if something was undone. - - Finally, if you neither insert nor delete text, but directly modify -the existing text (e.g., change its case), call `rl_modifying ()' once, -just before you modify the text. You must supply the indices of the -text range that you are going to modify. - - - Function: int rl_modifying (int start, int end) - Tell Readline to save the text between START and END as a single - undo unit. It is assumed that you will subsequently modify that - text. - - -File: readline.info, Node: Redisplay, Next: Modifying Text, Prev: Allowing Undoing, Up: Readline Convenience Functions - -Redisplay ---------- - - - Function: void rl_redisplay () - Change what's displayed on the screen to reflect the current - contents of `rl_line_buffer'. - - - Function: int rl_forced_update_display () - Force the line to be updated and redisplayed, whether or not - Readline thinks the screen display is correct. - - - Function: int rl_on_new_line () - Tell the update routines that we have moved onto a new (empty) - line, usually after ouputting a newline. - - - Function: int rl_reset_line_state () - Reset the display state to a clean state and redisplay the current - line starting on a new line. - - - Function: int rl_message (va_alist) - The arguments are a string as would be supplied to `printf'. The - resulting string is displayed in the "echo area". The echo area - is also used to display numeric arguments and search strings. - - - Function: int rl_clear_message () - Clear the message in the echo area. - - -File: readline.info, Node: Modifying Text, Next: Utility Functions, Prev: Redisplay, Up: Readline Convenience Functions - -Modifying Text --------------- - - - Function: int rl_insert_text (char *text) - Insert TEXT into the line at the current cursor position. - - - Function: int rl_delete_text (int start, int end) - Delete the text between START and END in the current line. - - - Function: char * rl_copy_text (int start, int end) - Return a copy of the text between START and END in the current - line. - - - Function: int rl_kill_text (int start, int end) - Copy the text between START and END in the current line to the - kill ring, appending or prepending to the last kill if the last - command was a kill command. The text is deleted. If START is - less than END, the text is appended, otherwise prepended. If the - last command was not a kill, a new kill ring slot is used. - - -File: readline.info, Node: Utility Functions, Next: Alternate Interface, Prev: Modifying Text, Up: Readline Convenience Functions - -Utility Functions ------------------ - - - Function: int rl_read_key () - Return the next character available. This handles input inserted - into the input stream via PENDING INPUT (*note Readline - Variables::.) and `rl_stuff_char ()', macros, and characters read - from the keyboard. - - - Function: int rl_getc (FILE *) - Return the next character available from the keyboard. - - - Function: int rl_stuff_char (int c) - Insert C into the Readline input stream. It will be "read" before - Readline attempts to read characters from the terminal with - `rl_read_key ()'. - - - Function: rl_extend_line_buffer (int len) - Ensure that `rl_line_buffer' has enough space to hold LEN - characters, possibly reallocating it if necessary. - - - Function: int rl_initialize () - Initialize or re-initialize Readline's internal state. - - - Function: int rl_reset_terminal (char *terminal_name) - Reinitialize Readline's idea of the terminal settings using - TERMINAL_NAME as the terminal type (e.g., `vt100'). - - - Function: int alphabetic (int c) - Return 1 if C is an alphabetic character. - - - Function: int numeric (int c) - Return 1 if C is a numeric character. - - - Function: int ding () - Ring the terminal bell, obeying the setting of `bell-style'. - - The following are implemented as macros, defined in `chartypes.h'. - - - Function: int uppercase_p (int c) - Return 1 if C is an uppercase alphabetic character. - - - Function: int lowercase_p (int c) - Return 1 if C is a lowercase alphabetic character. - - - Function: int digit_p (int c) - Return 1 if C is a numeric character. - - - Function: int to_upper (int c) - If C is a lowercase alphabetic character, return the corresponding - uppercase character. - - - Function: int to_lower (int c) - If C is an uppercase alphabetic character, return the corresponding - lowercase character. - - - Function: int digit_value (int c) - If C is a number, return the value it represents. - - -File: readline.info, Node: Alternate Interface, Prev: Utility Functions, Up: Readline Convenience Functions - -Alternate Interface -------------------- - - An alternate interface is available to plain `readline()'. Some -applications need to interleave keyboard I/O with file, device, or -window system I/O, typically by using a main loop to `select()' on -various file descriptors. To accomodate this need, readline can also -be invoked as a `callback' function from an event loop. There are -functions available to make this easy. - - - Function: void rl_callback_handler_install (char *prompt, Vfunction - *lhandler) - Set up the terminal for readline I/O and display the initial - expanded value of PROMPT. Save the value of LHANDLER to use as a - callback when a complete line of input has been entered. - - - Function: void rl_callback_read_char () - Whenever an application determines that keyboard input is - available, it should call `rl_callback_read_char()', which will - read the next character from the current input source. If that - character completes the line, `rl_callback_read_char' will invoke - the LHANDLER function saved by `rl_callback_handler_install' to - process the line. `EOF' is indicated by calling LHANDLER with a - `NULL' line. - - - Function: void rl_callback_handler_remove () - Restore the terminal to its initial state and remove the line - handler. This may be called from within a callback as well as - independently. - -An Example ----------- - - Here is a function which changes lowercase characters to their -uppercase equivalents, and uppercase characters to lowercase. If this -function was bound to `M-c', then typing `M-c' would change the case of -the character under point. Typing `M-1 0 M-c' would change the case of -the following 10 characters, leaving the cursor on the last character -changed. - - /* Invert the case of the COUNT following characters. */ - int - invert_case_line (count, key) - int count, key; - { - register int start, end, i; - - start = rl_point; - - if (rl_point >= rl_end) - return (0); - - if (count < 0) - { - direction = -1; - count = -count; - } - else - direction = 1; - - /* Find the end of the range to modify. */ - end = start + (count * direction); - - /* Force it to be within range. */ - if (end > rl_end) - end = rl_end; - else if (end < 0) - end = 0; - - if (start == end) - return (0); - - if (start > end) - { - int temp = start; - start = end; - end = temp; - } - - /* Tell readline that we are modifying the line, so it will save - the undo information. */ - rl_modifying (start, end); - - for (i = start; i != end; i++) - { - if (uppercase_p (rl_line_buffer[i])) - rl_line_buffer[i] = to_lower (rl_line_buffer[i]); - else if (lowercase_p (rl_line_buffer[i])) - rl_line_buffer[i] = to_upper (rl_line_buffer[i]); - } - /* Move point to on top of the last character changed. */ - rl_point = (direction == 1) ? end - 1 : start; - return (0); - } - - -File: readline.info, Node: Custom Completers, Prev: Readline Convenience Functions, Up: Programming with GNU Readline - -Custom Completers -================= - - Typically, a program that reads commands from the user has a way of -disambiguating commands and data. If your program is one of these, then -it can provide completion for commands, data, or both. The following -sections describe how your program and Readline cooperate to provide -this service. - -* Menu: - -* How Completing Works:: The logic used to do completion. -* Completion Functions:: Functions provided by Readline. -* Completion Variables:: Variables which control completion. -* A Short Completion Example:: An example of writing completer subroutines. - - -File: readline.info, Node: How Completing Works, Next: Completion Functions, Up: Custom Completers - -How Completing Works --------------------- - - In order to complete some text, the full list of possible completions -must be available. That is, it is not possible to accurately expand a -partial word without knowing all of the possible words which make sense -in that context. The Readline library provides the user interface to -completion, and two of the most common completion functions: filename -and username. For completing other types of text, you must write your -own completion function. This section describes exactly what such -functions must do, and provides an example. - - There are three major functions used to perform completion: - - 1. The user-interface function `rl_complete ()'. This function is - called with the same arguments as other Readline functions - intended for interactive use: COUNT and INVOKING_KEY. It - isolates the word to be completed and calls `completion_matches - ()' to generate a list of possible completions. It then either - lists the possible completions, inserts the possible completions, - or actually performs the completion, depending on which behavior - is desired. - - 2. The internal function `completion_matches ()' uses your - "generator" function to generate the list of possible matches, and - then returns the array of these matches. You should place the - address of your generator function in - `rl_completion_entry_function'. - - 3. The generator function is called repeatedly from - `completion_matches ()', returning a string each time. The - arguments to the generator function are TEXT and STATE. TEXT is - the partial word to be completed. STATE is zero the first time - the function is called, allowing the generator to perform any - necessary initialization, and a positive non-zero integer for each - subsequent call. When the generator function returns `(char - *)NULL' this signals `completion_matches ()' that there are no - more possibilities left. Usually the generator function computes - the list of possible completions when STATE is zero, and returns - them one at a time on subsequent calls. Each string the generator - function returns as a match must be allocated with `malloc()'; - Readline frees the strings when it has finished with them. - - - - Function: int rl_complete (int ignore, int invoking_key) - Complete the word at or before point. You have supplied the - function that does the initial simple matching selection algorithm - (see `completion_matches ()'). The default is to do filename - completion. - - - Variable: Function * rl_completion_entry_function - This is a pointer to the generator function for `completion_matches - ()'. If the value of `rl_completion_entry_function' is `(Function - *)NULL' then the default filename generator function, - `filename_completion_function ()', is used. - - -File: readline.info, Node: Completion Functions, Next: Completion Variables, Prev: How Completing Works, Up: Custom Completers - -Completion Functions --------------------- - - Here is the complete list of callable completion functions present in -Readline. - - - Function: int rl_complete_internal (int what_to_do) - Complete the word at or before point. WHAT_TO_DO says what to do - with the completion. A value of `?' means list the possible - completions. `TAB' means do standard completion. `*' means - insert all of the possible completions. `!' means to display all - of the possible completions, if there is more than one, as well as - performing partial completion. - - - Function: int rl_complete (int ignore, int invoking_key) - Complete the word at or before point. You have supplied the - function that does the initial simple matching selection algorithm - (see `completion_matches ()' and `rl_completion_entry_function'). - The default is to do filename completion. This calls - `rl_complete_internal ()' with an argument depending on - INVOKING_KEY. - - - Function: int rl_possible_completions (int count, int invoking_key)) - List the possible completions. See description of `rl_complete - ()'. This calls `rl_complete_internal ()' with an argument of `?'. - - - Function: int rl_insert_completions (int count, int invoking_key)) - Insert the list of possible completions into the line, deleting the - partially-completed word. See description of `rl_complete ()'. - This calls `rl_complete_internal ()' with an argument of `*'. - - - Function: char ** completion_matches (char *text, CPFunction - *entry_func) - Returns an array of `(char *)' which is a list of completions for - TEXT. If there are no completions, returns `(char **)NULL'. The - first entry in the returned array is the substitution for TEXT. - The remaining entries are the possible completions. The array is - terminated with a `NULL' pointer. - - ENTRY_FUNC is a function of two args, and returns a `(char *)'. - The first argument is TEXT. The second is a state argument; it is - zero on the first call, and non-zero on subsequent calls. - eNTRY_FUNC returns a `NULL' pointer to the caller when there are - no more matches. - - - Function: char * filename_completion_function (char *text, int state) - A generator function for filename completion in the general case. - Note that completion in Bash is a little different because of all - the pathnames that must be followed when looking up completions - for a command. The Bash source is a useful reference for writing - custom completion functions. - - - Function: char * username_completion_function (char *text, int state) - A completion generator for usernames. TEXT contains a partial - username preceded by a random character (usually `~'). As with all - completion generators, STATE is zero on the first call and non-zero - for subsequent calls. - - -File: readline.info, Node: Completion Variables, Next: A Short Completion Example, Prev: Completion Functions, Up: Custom Completers - -Completion Variables --------------------- - - - Variable: Function * rl_completion_entry_function - A pointer to the generator function for `completion_matches ()'. - `NULL' means to use `filename_entry_function ()', the default - filename completer. - - - Variable: CPPFunction * rl_attempted_completion_function - A pointer to an alternative function to create matches. The - function is called with TEXT, START, and END. START and END are - indices in `rl_line_buffer' saying what the boundaries of TEXT - are. If this function exists and returns `NULL', or if this - variable is set to `NULL', then `rl_complete ()' will call the - value of `rl_completion_entry_function' to generate matches, - otherwise the array of strings returned will be used. - - - Variable: CPFunction * rl_filename_quoting_function - A pointer to a function that will quote a filename in an - application- specific fashion. This is called if filename - completion is being attempted and one of the characters in - `rl_filename_quote_characters' appears in a completed filename. - The function is called with TEXT, MATCH_TYPE, and QUOTE_POINTER. - The TEXT is the filename to be quoted. The MATCH_TYPE is either - `SINGLE_MATCH', if there is only one completion match, or - `MULT_MATCH'. Some functions use this to decide whether or not to - insert a closing quote character. The QUOTE_POINTER is a pointer - to any opening quote character the user typed. Some functions - choose to reset this character. - - - Variable: CPFunction * rl_filename_dequoting_function - A pointer to a function that will remove application-specific - quoting characters from a filename before completion is attempted, - so those characters do not interfere with matching the text - against names in the filesystem. It is called with TEXT, the text - of the word to be dequoted, and QUOTE_CHAR, which is the quoting - character that delimits the filename (usually `'' or `"'). If - QUOTE_CHAR is zero, the filename was not in an embedded string. - - - Variable: Function * rl_char_is_quoted_p - A pointer to a function to call that determines whether or not a - specific character in the line buffer is quoted, according to - whatever quoting mechanism the program calling readline uses. The - function is called with two arguments: TEXT, the text of the line, - and INDEX, the index of the character in the line. It is used to - decide whether a character found in - `rl_completer_word_break_characters' should be used to break words - for the completer. - - - Variable: int rl_completion_query_items - Up to this many items will be displayed in response to a - possible-completions call. After that, we ask the user if she is - sure she wants to see them all. The default value is 100. - - - Variable: char * rl_basic_word_break_characters - The basic list of characters that signal a break between words for - the completer routine. The default value of this variable is the - characters which break words for completion in Bash, i.e., `" - \t\n\"\\'`@$><=;|&{("'. - - - Variable: char * rl_basic_quote_characters - List of quote characters which can cause a word break. - - - Variable: char * rl_completer_word_break_characters - The list of characters that signal a break between words for - `rl_complete_internal ()'. The default list is the value of - `rl_basic_word_break_characters'. - - - Variable: char * rl_completer_quote_characters - List of characters which can be used to quote a substring of the - line. Completion occurs on the entire substring, and within the - substring `rl_completer_word_break_characters' are treated as any - other character, unless they also appear within this list. - - - Variable: char * rl_filename_quote_characters - A list of characters that cause a filename to be quoted by the - completer when they appear in a completed filename. The default - is empty. - - - Variable: char * rl_special_prefixes - The list of characters that are word break characters, but should - be left in TEXT when it is passed to the completion function. - Programs can use this to help determine what kind of completing to - do. For instance, Bash sets this variable to "$@" so that it can - complete shell variables and hostnames. - - - Variable: int rl_completion_append_character - When a single completion alternative matches at the end of the - command line, this character is appended to the inserted - completion text. The default is a space character (` '). Setting - this to the null character (`\0') prevents anything being appended - automatically. This can be changed in custom completion functions - to provide the "most sensible word separator character" according - to an application-specific command line syntax specification. - - - Variable: int rl_ignore_completion_duplicates - If non-zero, then disallow duplicates in the matches. Default is - 1. - - - Variable: int rl_filename_completion_desired - Non-zero means that the results of the matches are to be treated as - filenames. This is *always* zero on entry, and can only be changed - within a completion entry generator function. If it is set to a - non-zero value, directory names have a slash appended and Readline - attempts to quote completed filenames if they contain any embedded - word break characters. - - - Variable: int rl_filename_quoting_desired - Non-zero means that the results of the matches are to be quoted - using double quotes (or an application-specific quoting mechanism) - if the completed filename contains any characters in - `rl_filename_quote_chars'. This is *always* non-zero on entry, - and can only be changed within a completion entry generator - function. The quoting is effected via a call to the function - pointed to by `rl_filename_quoting_function'. - - - Variable: int rl_inhibit_completion - If this variable is non-zero, completion is inhibit<ed. The - completion character will be inserted as any other bound to - `self-insert'. - - - Variable: Function * rl_ignore_some_completions_function - This function, if defined, is called by the completer when real - filename completion is done, after all the matching names have - been generated. It is passed a `NULL' terminated array of matches. - The first element (`matches[0]') is the maximal substring common - to all matches. This function can re-arrange the list of matches - as required, but each element deleted from the array must be freed. - - - Variable: Function * rl_directory_completion_hook - This function, if defined, is allowed to modify the directory - portion of filenames Readline completes. It is called with the - address of a string (the current directory name) as an argument. - It could be used to expand symbolic links or shell variables in - pathnames. - - -File: readline.info, Node: A Short Completion Example, Prev: Completion Variables, Up: Custom Completers - -A Short Completion Example --------------------------- - - Here is a small application demonstrating the use of the GNU Readline -library. It is called `fileman', and the source code resides in -`examples/fileman.c'. This sample application provides completion of -command names, line editing features, and access to the history list. - - /* fileman.c -- A tiny application which demonstrates how to use the - GNU Readline library. This application interactively allows users - to manipulate files and their modes. */ - - #include <stdio.h> - #include <sys/types.h> - #include <sys/file.h> - #include <sys/stat.h> - #include <sys/errno.h> - - #include <readline/readline.h> - #include <readline/history.h> - - extern char *getwd (); - extern char *xmalloc (); - - /* The names of functions that actually do the manipulation. */ - int com_list (), com_view (), com_rename (), com_stat (), com_pwd (); - int com_delete (), com_help (), com_cd (), com_quit (); - - /* A structure which contains information on the commands this program - can understand. */ - - typedef struct { - char *name; /* User printable name of the function. */ - Function *func; /* Function to call to do the job. */ - char *doc; /* Documentation for this function. */ - } COMMAND; - - COMMAND commands[] = { - { "cd", com_cd, "Change to directory DIR" }, - { "delete", com_delete, "Delete FILE" }, - { "help", com_help, "Display this text" }, - { "?", com_help, "Synonym for `help'" }, - { "list", com_list, "List files in DIR" }, - { "ls", com_list, "Synonym for `list'" }, - { "pwd", com_pwd, "Print the current working directory" }, - { "quit", com_quit, "Quit using Fileman" }, - { "rename", com_rename, "Rename FILE to NEWNAME" }, - { "stat", com_stat, "Print out statistics on FILE" }, - { "view", com_view, "View the contents of FILE" }, - { (char *)NULL, (Function *)NULL, (char *)NULL } - }; - - /* Forward declarations. */ - char *stripwhite (); - COMMAND *find_command (); - - /* The name of this program, as taken from argv[0]. */ - char *progname; - - /* When non-zero, this global means the user is done using this program. */ - int done; - - char * - dupstr (s) - int s; - { - char *r; - - r = xmalloc (strlen (s) + 1); - strcpy (r, s); - return (r); - } - - main (argc, argv) - int argc; - char **argv; - { - char *line, *s; - - progname = argv[0]; - - initialize_readline (); /* Bind our completer. */ - - /* Loop reading and executing lines until the user quits. */ - for ( ; done == 0; ) - { - line = readline ("FileMan: "); - - if (!line) - break; - - /* Remove leading and trailing whitespace from the line. - Then, if there is anything left, add it to the history list - and execute it. */ - s = stripwhite (line); - - if (*s) - { - add_history (s); - execute_line (s); - } - - free (line); - } - exit (0); - } - - /* Execute a command line. */ - int - execute_line (line) - char *line; - { - register int i; - COMMAND *command; - char *word; - - /* Isolate the command word. */ - i = 0; - while (line[i] && whitespace (line[i])) - i++; - word = line + i; - - while (line[i] && !whitespace (line[i])) - i++; - - if (line[i]) - line[i++] = '\0'; - - command = find_command (word); - - if (!command) - { - fprintf (stderr, "%s: No such command for FileMan.\n", word); - return (-1); - } - - /* Get argument to command, if any. */ - while (whitespace (line[i])) - i++; - - word = line + i; - - /* Call the function. */ - return ((*(command->func)) (word)); - } - - /* Look up NAME as the name of a command, and return a pointer to that - command. Return a NULL pointer if NAME isn't a command name. */ - COMMAND * - find_command (name) - char *name; - { - register int i; - - for (i = 0; commands[i].name; i++) - if (strcmp (name, commands[i].name) == 0) - return (&commands[i]); - - return ((COMMAND *)NULL); - } - - /* Strip whitespace from the start and end of STRING. Return a pointer - into STRING. */ - char * - stripwhite (string) - char *string; - { - register char *s, *t; - - for (s = string; whitespace (*s); s++) - ; - - if (*s == 0) - return (s); - - t = s + strlen (s) - 1; - while (t > s && whitespace (*t)) - t--; - *++t = '\0'; - - return s; - } - - /* **************************************************************** */ - /* */ - /* Interface to Readline Completion */ - /* */ - /* **************************************************************** */ - - char *command_generator (); - char **fileman_completion (); - - /* Tell the GNU Readline library how to complete. We want to try to complete - on command names if this is the first word in the line, or on filenames - if not. */ - initialize_readline () - { - /* Allow conditional parsing of the ~/.inputrc file. */ - rl_readline_name = "FileMan"; - - /* Tell the completer that we want a crack first. */ - rl_attempted_completion_function = (CPPFunction *)fileman_completion; - } - - /* Attempt to complete on the contents of TEXT. START and END bound the - region of rl_line_buffer that contains the word to complete. TEXT is - the word to complete. We can use the entire contents of rl_line_buffer - in case we want to do some simple parsing. Return the array of matches, - or NULL if there aren't any. */ - char ** - fileman_completion (text, start, end) - char *text; - int start, end; - { - char **matches; - - matches = (char **)NULL; - - /* If this word is at the start of the line, then it is a command - to complete. Otherwise it is the name of a file in the current - directory. */ - if (start == 0) - matches = completion_matches (text, command_generator); - - return (matches); - } - - /* Generator function for command completion. STATE lets us know whether - to start from scratch; without any state (i.e. STATE == 0), then we - start at the top of the list. */ - char * - command_generator (text, state) - char *text; - int state; - { - static int list_index, len; - char *name; - - /* If this is a new word to complete, initialize now. This includes - saving the length of TEXT for efficiency, and initializing the index - variable to 0. */ - if (!state) - { - list_index = 0; - len = strlen (text); - } - - /* Return the next name which partially matches from the command list. */ - while (name = commands[list_index].name) - { - list_index++; - - if (strncmp (name, text, len) == 0) - return (dupstr(name)); - } - - /* If no names matched, then return NULL. */ - return ((char *)NULL); - } - - /* **************************************************************** */ - /* */ - /* FileMan Commands */ - /* */ - /* **************************************************************** */ - - /* String to pass to system (). This is for the LIST, VIEW and RENAME - commands. */ - static char syscom[1024]; - - /* List the file(s) named in arg. */ - com_list (arg) - char *arg; - { - if (!arg) - arg = ""; - - sprintf (syscom, "ls -FClg %s", arg); - return (system (syscom)); - } - - com_view (arg) - char *arg; - { - if (!valid_argument ("view", arg)) - return 1; - - sprintf (syscom, "more %s", arg); - return (system (syscom)); - } - - com_rename (arg) - char *arg; - { - too_dangerous ("rename"); - return (1); - } - - com_stat (arg) - char *arg; - { - struct stat finfo; - - if (!valid_argument ("stat", arg)) - return (1); - - if (stat (arg, &finfo) == -1) - { - perror (arg); - return (1); - } - - printf ("Statistics for `%s':\n", arg); - - printf ("%s has %d link%s, and is %d byte%s in length.\n", arg, - finfo.st_nlink, - (finfo.st_nlink == 1) ? "" : "s", - finfo.st_size, - (finfo.st_size == 1) ? "" : "s"); - printf ("Inode Last Change at: %s", ctime (&finfo.st_ctime)); - printf (" Last access at: %s", ctime (&finfo.st_atime)); - printf (" Last modified at: %s", ctime (&finfo.st_mtime)); - return (0); - } - - com_delete (arg) - char *arg; - { - too_dangerous ("delete"); - return (1); - } - - /* Print out help for ARG, or for all of the commands if ARG is - not present. */ - com_help (arg) - char *arg; - { - register int i; - int printed = 0; - - for (i = 0; commands[i].name; i++) - { - if (!*arg || (strcmp (arg, commands[i].name) == 0)) - { - printf ("%s\t\t%s.\n", commands[i].name, commands[i].doc); - printed++; - } - } - - if (!printed) - { - printf ("No commands match `%s'. Possibilties are:\n", arg); - - for (i = 0; commands[i].name; i++) - { - /* Print in six columns. */ - if (printed == 6) - { - printed = 0; - printf ("\n"); - } - - printf ("%s\t", commands[i].name); - printed++; - } - - if (printed) - printf ("\n"); - } - return (0); - } - - /* Change to the directory ARG. */ - com_cd (arg) - char *arg; - { - if (chdir (arg) == -1) - { - perror (arg); - return 1; - } - - com_pwd (""); - return (0); - } - - /* Print out the current working directory. */ - com_pwd (ignore) - char *ignore; - { - char dir[1024], *s; - - s = getwd (dir); - if (s == 0) - { - printf ("Error getting pwd: %s\n", dir); - return 1; - } - - printf ("Current directory is %s\n", dir); - return 0; - } - - /* The user wishes to quit using this program. Just set DONE non-zero. */ - com_quit (arg) - char *arg; - { - done = 1; - return (0); - } - - /* Function which tells you that you can't do this. */ - too_dangerous (caller) - char *caller; - { - fprintf (stderr, - "%s: Too dangerous for me to distribute. Write it yourself.\n", - caller); - } - - /* Return non-zero if ARG is a valid argument for CALLER, else print - an error message and return zero. */ - int - valid_argument (caller, arg) - char *caller, *arg; - { - if (!arg || !*arg) - { - fprintf (stderr, "%s: Argument required.\n", caller); - return (0); - } - - return (1); - } - - -File: readline.info, Node: Concept Index, Next: Function and Variable Index, Prev: Programming with GNU Readline, Up: Top - -Concept Index -************* - -* Menu: - -* command editing: Readline Bare Essentials. -* editing command lines: Readline Bare Essentials. -* initialization file, readline: Readline Init File. -* interaction, readline: Readline Interaction. -* kill ring: Readline Killing Commands. -* killing text: Readline Killing Commands. -* notation, readline: Readline Bare Essentials. -* readline, function: Basic Behavior. -* yanking text: Readline Killing Commands. - - -File: readline.info, Node: Function and Variable Index, Prev: Concept Index, Up: Top - -Function and Variable Index -*************************** - -* Menu: - -* (: Utility Functions. -* abort (C-g): Miscellaneous Commands. -* accept-line (Newline, Return): Commands For History. -* alphabetic: Utility Functions. -* backward-char (C-b): Commands For Moving. -* backward-delete-char (Rubout): Commands For Text. -* backward-kill-line (C-x Rubout): Commands For Killing. -* backward-kill-word (M-DEL): Commands For Killing. -* backward-word (M-b): Commands For Moving. -* beginning-of-history (M-<): Commands For History. -* beginning-of-line (C-a): Commands For Moving. -* bell-style: Readline Init File Syntax. -* call-last-kbd-macro (C-x e): Keyboard Macros. -* capitalize-word (M-c): Commands For Text. -* character-search (C-]): Miscellaneous Commands. -* character-search-backward (M-C-]): Miscellaneous Commands. -* clear-screen (C-l): Commands For Moving. -* comment-begin: Readline Init File Syntax. -* complete (TAB): Commands For Completion. -* completion-query-items: Readline Init File Syntax. -* completion_matches: Completion Functions. -* convert-meta: Readline Init File Syntax. -* copy-backward-word (): Commands For Killing. -* copy-forward-word (): Commands For Killing. -* copy-region-as-kill (): Commands For Killing. -* delete-char (C-d): Commands For Text. -* delete-horizontal-space (): Commands For Killing. -* digit-argument (M-0, M-1, ... M-): Numeric Arguments. -* digit_p: Utility Functions. -* digit_value: Utility Functions. -* ding: Utility Functions. -* disable-completion: Readline Init File Syntax. -* do-uppercase-version (M-a, M-b, M-X, ...): Miscellaneous Commands. -* downcase-word (M-l): Commands For Text. -* dump-functions (): Miscellaneous Commands. -* dump-macros (): Miscellaneous Commands. -* dump-variables (): Miscellaneous Commands. -* editing-mode: Readline Init File Syntax. -* enable-keypad: Readline Init File Syntax. -* end-kbd-macro (C-x )): Keyboard Macros. -* end-of-history (M->): Commands For History. -* end-of-line (C-e): Commands For Moving. -* exchange-point-and-mark (C-x C-x): Miscellaneous Commands. -* expand-tilde: Readline Init File Syntax. -* filename_completion_function: Completion Functions. -* forward-char (C-f): Commands For Moving. -* forward-search-history (C-s): Commands For History. -* forward-word (M-f): Commands For Moving. -* free_undo_list: Allowing Undoing. -* history-search-backward (): Commands For History. -* history-search-forward (): Commands For History. -* horizontal-scroll-mode: Readline Init File Syntax. -* input-meta: Readline Init File Syntax. -* insert-comment (M-#): Miscellaneous Commands. -* insert-completions (M-*): Commands For Completion. -* keymap: Readline Init File Syntax. -* kill-line (C-k): Commands For Killing. -* kill-region (): Commands For Killing. -* kill-whole-line (): Commands For Killing. -* kill-word (M-d): Commands For Killing. -* lowercase_p: Utility Functions. -* mark-modified-lines: Readline Init File Syntax. -* meta-flag: Readline Init File Syntax. -* next-history (C-n): Commands For History. -* non-incremental-forward-search-history (M-n): Commands For History. -* non-incremental-reverse-search-history (M-p): Commands For History. -* numeric: Utility Functions. -* output-meta: Readline Init File Syntax. -* possible-completions (M-?): Commands For Completion. -* prefix-meta (ESC): Miscellaneous Commands. -* previous-history (C-p): Commands For History. -* quoted-insert (C-q, C-v): Commands For Text. -* re-read-init-file (C-x C-r): Miscellaneous Commands. -* readline: Basic Behavior. -* redraw-current-line (): Commands For Moving. -* reverse-search-history (C-r): Commands For History. -* revert-line (M-r): Miscellaneous Commands. -* rl_add_defun: Function Naming. -* rl_add_undo: Allowing Undoing. -* rl_attempted_completion_function: Completion Variables. -* rl_basic_quote_characters: Completion Variables. -* rl_basic_word_break_characters: Completion Variables. -* rl_begin_undo_group: Allowing Undoing. -* rl_binding_keymap: Readline Variables. -* rl_bind_key: Binding Keys. -* rl_bind_key_in_map: Binding Keys. -* rl_callback_handler_install: Alternate Interface. -* rl_callback_handler_remove: Alternate Interface. -* rl_callback_read_char: Alternate Interface. -* rl_char_is_quoted_p: Completion Variables. -* rl_clear_message: Redisplay. -* rl_complete: Completion Functions. -* rl_complete: How Completing Works. -* rl_completer_quote_characters: Completion Variables. -* rl_completer_word_break_characters: Completion Variables. -* rl_complete_internal: Completion Functions. -* rl_completion_append_character: Completion Variables. -* rl_completion_entry_function: Completion Variables. -* rl_completion_entry_function: How Completing Works. -* rl_completion_query_items: Completion Variables. -* rl_copy_keymap: Keymaps. -* rl_copy_text: Modifying Text. -* rl_delete_text: Modifying Text. -* rl_directory_completion_hook: Completion Variables. -* rl_discard_keymap: Keymaps. -* rl_done: Readline Variables. -* rl_do_undo: Allowing Undoing. -* rl_end: Readline Variables. -* rl_end_undo_group: Allowing Undoing. -* rl_event_hook: Readline Variables. -* rl_executing_keymap: Readline Variables. -* rl_filename_completion_desired: Completion Variables. -* rl_filename_dequoting_function: Completion Variables. -* rl_filename_quote_characters: Completion Variables. -* rl_filename_quoting_desired: Completion Variables. -* rl_filename_quoting_function: Completion Variables. -* rl_forced_update_display: Redisplay. -* rl_function_dumper: Associating Function Names and Bindings. -* rl_function_of_keyseq: Associating Function Names and Bindings. -* rl_generic_bind: Binding Keys. -* rl_getc: Utility Functions. -* rl_getc_function: Readline Variables. -* rl_get_keymap: Keymaps. -* rl_get_keymap_by_name: Keymaps. -* rl_get_keymap_name: Keymaps. -* rl_ignore_completion_duplicates: Completion Variables. -* rl_ignore_some_completions_function: Completion Variables. -* rl_inhibit_completion: Completion Variables. -* rl_initialize: Utility Functions. -* rl_insert_completions: Completion Functions. -* rl_insert_text: Modifying Text. -* rl_instream: Readline Variables. -* rl_invoking_keyseqs: Associating Function Names and Bindings. -* rl_invoking_keyseqs_in_map: Associating Function Names and Bindings. -* rl_kill_text: Modifying Text. -* rl_library_version: Readline Variables. -* rl_line_buffer: Readline Variables. -* rl_list_funmap_names: Associating Function Names and Bindings. -* rl_make_bare_keymap: Keymaps. -* rl_make_keymap: Keymaps. -* rl_mark: Readline Variables. -* rl_message: Redisplay. -* rl_modifying: Allowing Undoing. -* rl_named_function: Associating Function Names and Bindings. -* rl_on_new_line: Redisplay. -* rl_outstream: Readline Variables. -* rl_parse_and_bind: Binding Keys. -* rl_pending_input: Readline Variables. -* rl_point: Readline Variables. -* rl_possible_completions: Completion Functions. -* rl_prompt: Readline Variables. -* rl_readline_name: Readline Variables. -* rl_read_init_file: Binding Keys. -* rl_read_key: Utility Functions. -* rl_redisplay: Redisplay. -* rl_redisplay_function: Readline Variables. -* rl_reset_line_state: Redisplay. -* rl_reset_terminal: Utility Functions. -* rl_set_keymap: Keymaps. -* rl_special_prefixes: Completion Variables. -* rl_startup_hook: Readline Variables. -* rl_stuff_char: Utility Functions. -* rl_terminal_name: Readline Variables. -* rl_unbind_key: Binding Keys. -* rl_unbind_key_in_map: Binding Keys. -* self-insert (a, b, A, 1, !, ...): Commands For Text. -* set-mark (C-@): Miscellaneous Commands. -* show-all-if-ambiguous: Readline Init File Syntax. -* start-kbd-macro (C-x (): Keyboard Macros. -* tab-insert (M-TAB): Commands For Text. -* tilde-expand (M-~): Miscellaneous Commands. -* to_lower: Utility Functions. -* to_upper: Utility Functions. -* transpose-chars (C-t): Commands For Text. -* transpose-words (M-t): Commands For Text. -* undo (C-_, C-x C-u): Miscellaneous Commands. -* universal-argument (): Numeric Arguments. -* unix-line-discard (C-u): Commands For Killing. -* unix-word-rubout (C-w): Commands For Killing. -* upcase-word (M-u): Commands For Text. -* uppercase_p: Utility Functions. -* username_completion_function: Completion Functions. -* visible-stats: Readline Init File Syntax. -* yank (C-y): Commands For Killing. -* yank-last-arg (M-., M-_): Commands For History. -* yank-nth-arg (M-C-y): Commands For History. -* yank-pop (M-y): Commands For Killing. - - - -Tag Table: -Node: Top1048 -Node: Command Line Editing1661 -Node: Introduction and Notation2312 -Node: Readline Interaction3321 -Node: Readline Bare Essentials4510 -Node: Readline Movement Commands6040 -Node: Readline Killing Commands6931 -Node: Readline Arguments8634 -Node: Searching9608 -Node: Readline Init File11209 -Node: Readline Init File Syntax12272 -Node: Conditional Init Constructs20062 -Node: Sample Init File22344 -Node: Bindable Readline Commands25378 -Node: Commands For Moving26129 -Node: Commands For History26977 -Node: Commands For Text29591 -Node: Commands For Killing31334 -Node: Numeric Arguments33361 -Node: Commands For Completion34486 -Node: Keyboard Macros35370 -Node: Miscellaneous Commands35929 -Node: Readline vi Mode38740 -Node: Programming with GNU Readline40496 -Node: Basic Behavior41365 -Node: Custom Functions44678 -Node: The Function Type45279 -Node: Function Writing46124 -Node: Readline Variables47208 -Node: Readline Convenience Functions50296 -Node: Function Naming51027 -Node: Keymaps52254 -Node: Binding Keys53968 -Node: Associating Function Names and Bindings55912 -Node: Allowing Undoing57490 -Node: Redisplay60075 -Node: Modifying Text61146 -Node: Utility Functions62057 -Node: Alternate Interface64176 -Node: Custom Completers67470 -Node: How Completing Works68191 -Node: Completion Functions71187 -Node: Completion Variables74202 -Node: A Short Completion Example81344 -Node: Concept Index93650 -Node: Function and Variable Index94395 - -End Tag Table
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Fr(Readline)j(pro)o(vides)d(commands)g(for)g(searc)o -(hing)h(through)e(the)i(command)f(history)g(for)g(lines)h(con)o -(taining)g(a)0 1599 y(sp)q(eci\014ed)h(string.)j(There)c(are)f(t)o(w)o -(o)e(searc)o(h)i(mo)q(des:)20 b Fl(incremen)o(tal)f Fr(and)c -Fl(non-incremen)o(tal)p Fr(.)62 1761 y(Incremen)o(tal)i(searc)o(hes)e -(b)q(egin)i(b)q(efore)f(the)g(user)f(has)h(\014nished)h(t)o(yping)f -(the)g(searc)o(h)f(string.)21 b(As)15 b(eac)o(h)h(c)o(har-)0 -1823 y(acter)f(of)h(the)g(searc)o(h)f(string)h(is)g(t)o(yp)q(ed,)g -(readline)h(displa)o(ys)g(the)f(next)g(en)o(try)f(from)g(the)h(history) -g(matc)o(hing)g(the)0 1885 y(string)g(t)o(yp)q(ed)g(so)f(far.)20 -b(An)c(incremen)o(tal)h(searc)o(h)e(requires)i(only)f(as)f(man)o(y)g(c) -o(haracters)g(as)h(needed)h(to)e(\014nd)h(the)0 1948 -y(desired)g(history)f(en)o(try)l(.)20 b(The)15 b(Escap)q(e)h(c)o -(haracter)e(is)h(used)h(to)e(terminate)h(an)g(incremen)o(tal)h(searc)o -(h.)k(Con)o(trol-J)0 2010 y(will)c(also)f(terminate)g(the)g(searc)o(h.) 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-(the)h(history)h(list.)62 2545 y(Non-incremen)o(tal)k(searc)o(hes)f -(read)f(the)h(en)o(tire)g(searc)o(h)g(string)f(b)q(efore)h(starting)f -(to)g(searc)o(h)h(for)f(matc)o(hing)0 2608 y(history)g(lines.)29 -b(The)18 b(searc)o(h)g(string)g(ma)o(y)f(b)q(e)h(t)o(yp)q(ed)g(b)o(y)g -(the)g(user)g(or)f(part)g(of)h(the)g(con)o(ten)o(ts)f(of)g(the)h -(curren)o(t)0 2670 y(line.)p eop -5 6 bop 0 -58 a Fr(Chapter)15 b(1:)k(Command)c(Line)i(Editing)1227 -b(5)0 183 y Fp(1.3)33 b(Readline)16 b(Init)g(File)62 -324 y Fr(Although)h(the)f(Readline)j(library)e(comes)f(with)g(a)g(set)g -(of)g Fq(emacs)p Fr(-lik)o(e)h(k)o(eybindings)h(installed)g(b)o(y)e -(default,)0 387 y(it)e(is)g(p)q(ossible)i(that)d(y)o(ou)g(w)o(ould)h -(lik)o(e)h(to)e(use)h(a)f(di\013eren)o(t)h(set)g(of)f(k)o(eybindings.) -21 b(Y)l(ou)14 b(can)g(customize)g(programs)0 449 y(that)j(use)h -(Readline)i(b)o(y)e(putting)h(commands)e(in)i(an)f Fl(inputrc)j -Fr(\014le)e(in)g(y)o(our)e(home)h(directory)l(.)28 b(The)19 -b(name)e(of)0 511 y(this)e(\014le)h(is)g(tak)o(en)e(from)h(the)g(v)m -(alue)h(of)e(the)h(en)o(vironmen)o(t)h(v)m(ariable)g -Fq(INPUTRC)p Fr(.)j(If)c(that)f(v)m(ariable)j(is)e(unset,)g(the)0 -573 y(default)h(is)f(`)p Fq(~/.inputrc)p Fr('.)62 714 -y(When)k(a)g(program)e(whic)o(h)j(uses)f(the)g(Readline)i(library)e -(starts)f(up,)h(the)g(init)h(\014le)g(is)f(read,)g(and)g(the)g(k)o(ey)0 -777 y(bindings)e(are)e(set.)62 918 y(In)j(addition,)h(the)f -Fq(C-x)c(C-r)k Fr(command)f(re-reads)g(this)h(init)h(\014le,)g(th)o(us) -e(incorp)q(orating)h(an)o(y)f(c)o(hanges)h(that)0 980 -y(y)o(ou)d(migh)o(t)g(ha)o(v)o(e)g(made)g(to)f(it.)0 -1224 y Fk(1.3.1)30 b(Readline)15 b(Init)g(File)g(Syn)n(tax)62 -1365 y Fr(There)h(are)f(only)h(a)f(few)g(basic)h(constructs)f(allo)o(w) -o(ed)h(in)g(the)g(Readline)i(init)e(\014le.)22 b(Blank)16 -b(lines)h(are)e(ignored.)0 1427 y(Lines)f(b)q(eginning)h(with)e(a)f(`)p -Fq(#)p Fr(')g(are)g(commen)o(ts.)19 b(Lines)14 b(b)q(eginning)h(with)e -(a)f(`)p Fq($)p Fr(')g(indicate)i(conditional)g(constructs)0 -1490 y(\(see)i(Section)h(1.3.2)e([Conditional)i(Init)g(Constructs],)e -(page)i(8\).)22 b(Other)16 b(lines)i(denote)f(v)m(ariable)h(settings)e -(and)0 1552 y(k)o(ey)f(bindings.)0 1710 y(V)l(ariable)h(Settings)240 -1772 y(Y)l(ou)j(can)g(c)o(hange)g(the)g(state)f(of)g(a)g(few)h(v)m -(ariables)h(in)g(Readline)h(b)o(y)d(using)i(the)f Fq(set)f -Fr(command)240 1834 y(within)e(the)f(init)h(\014le.)k(Here)15 -b(is)g(ho)o(w)g(y)o(ou)f(w)o(ould)h(sp)q(ecify)h(that)e(y)o(ou)g(wish)i -(to)e(use)h Fq(vi)f Fr(line)j(editing)240 1896 y(commands:)360 -1965 y Fq(set)23 b(editing-mode)g(vi)240 2044 y Fr(Righ)o(t)14 -b(no)o(w,)f(there)h(are)f(only)h(a)f(few)h(v)m(ariables)g(whic)o(h)h -(can)f(b)q(e)g(set;)f(so)g(few,)h(in)g(fact,)f(that)g(w)o(e)g(just)240 -2106 y(list)j(them)f(here:)240 2201 y Fq(bell-style)480 -2263 y Fr(Con)o(trols)h(what)f(happ)q(ens)j(when)f(Readline)h(w)o(an)o -(ts)e(to)f(ring)i(the)f(terminal)h(b)q(ell.)26 b(If)480 -2326 y(set)17 b(to)f(`)p Fq(none)p Fr(',)g(Readline)j(nev)o(er)f(rings) -f(the)g(b)q(ell.)28 b(If)17 b(set)g(to)f(`)p Fq(visible)p -Fr(',)g(Readline)480 2388 y(uses)21 b(a)g(visible)j(b)q(ell)f(if)e(one) -h(is)f(a)o(v)m(ailable.)40 b(If)21 b(set)g(to)g(`)p Fq(audible)p -Fr(')e(\(the)i(default\),)480 2450 y(Readline)d(attempts)c(to)g(ring)i -(the)f(terminal's)h(b)q(ell.)240 2545 y Fq(comment-begin)480 -2608 y Fr(The)d(string)h(to)e(insert)i(at)e(the)i(b)q(eginning)h(of)e -(the)g(line)i(when)f(the)f Fq(insert-comment)480 2670 -y Fr(command)i(is)h(executed.)21 b(The)15 b(default)h(v)m(alue)g(is)g -Fq("#")p Fr(.)p eop -6 7 bop 0 -58 a Fr(6)1472 b(GNU)15 b(Readline)i(Library)240 -183 y Fq(completion-query-items)480 246 y Fr(The)12 b(n)o(um)o(b)q(er)g -(of)f(p)q(ossible)j(completions)e(that)f(determines)i(when)f(the)g -(user)g(is)g(ask)o(ed)480 308 y(whether)k(he)h(w)o(an)o(ts)d(to)i(see)g -(the)g(list)h(of)e(p)q(ossibiliti)q(es.)25 b(If)16 b(the)g(n)o(um)o(b)q -(er)h(of)e(p)q(ossible)480 370 y(completions)i(is)f(greater)f(than)h -(this)h(v)m(alue,)f(Readline)j(will)e(ask)f(the)g(user)g(whether)480 -432 y(or)k(not)h(he)h(wishes)f(to)g(view)g(them;)j(otherwise,)e(they)f -(are)g(simply)h(listed.)39 b(The)480 495 y(default)16 -b(limit)g(is)g Fq(100)p Fr(.)240 592 y Fq(convert-meta)480 -654 y Fr(If)21 b(set)f(to)g(`)p Fq(on)p Fr(',)g(Readline)j(will)f(con)o -(v)o(ert)e(c)o(haracters)f(with)i(the)g(eigth)f(bit)h(set)g(to)480 -716 y(an)c(ASCI)q(I)g(k)o(ey)g(sequence)h(b)o(y)e(stripping)i(the)f -(eigth)g(bit)g(and)g(prep)q(ending)i(an)d Fq(ESC)480 -779 y Fr(c)o(haracter,)h(con)o(v)o(erting)g(them)g(to)f(a)h -(meta-pre\014xed)h(k)o(ey)f(sequence.)27 b(The)17 b(default)480 -841 y(v)m(alue)f(is)g(`)p Fq(on)p Fr('.)240 938 y Fq -(disable-completion)480 1000 y Fr(If)e(set)f(to)g(`)p -Fq(On)p Fr(',)f(readline)j(will)h(inhibit)f(w)o(ord)e(completion.)20 -b(Completion)15 b(c)o(haracters)480 1063 y(will)h(b)q(e)g(inserted)g -(in)o(to)e(the)h(line)i(as)d(if)h(they)g(had)g(b)q(een)h(mapp)q(ed)g -(to)e Fq(self-insert)p Fr(.)480 1125 y(The)h(default)h(is)g(`)p -Fq(off)p Fr('.)240 1222 y Fq(editing-mode)480 1285 y -Fr(The)d Fq(editing-mode)e Fr(v)m(ariable)j(con)o(trols)e(whic)o(h)h -(editing)h(mo)q(de)f(y)o(ou)f(are)g(using.)20 b(By)480 -1347 y(default,)f(Readline)h(starts)c(up)i(in)h(Emacs)e(editing)i(mo)q -(de,)f(where)g(the)g(k)o(eystrok)o(es)480 1409 y(are)g(most)f(similar)i -(to)e(Emacs.)27 b(This)19 b(v)m(ariable)g(can)f(b)q(e)h(set)e(to)g -(either)i(`)p Fq(emacs)p Fr(')d(or)480 1471 y(`)p Fq(vi)p -Fr('.)240 1569 y Fq(enable-keypad)480 1631 y Fr(When)g(set)g(to)f(`)p -Fq(on)p Fr(',)g(readline)j(will)f(try)e(to)h(enable)h(the)f -(application)h(k)o(eypad)f(when)480 1693 y(it)f(is)g(called.)22 -b(Some)15 b(systems)f(need)i(this)f(to)f(enable)i(the)f(arro)o(w)f(k)o -(eys.)19 b(The)c(default)480 1755 y(is)h(`)p Fq(off)p -Fr('.)240 1853 y Fq(expand-tilde)480 1915 y Fr(If)i(set)f(to)f(`)p -Fq(on)p Fr(',)h(tilde)h(expansion)h(is)e(p)q(erformed)h(when)g -(Readline)h(attempts)e(w)o(ord)480 1977 y(completion.)k(The)15 -b(default)h(is)g(`)p Fq(off)p Fr('.)240 2075 y Fq -(horizontal-scroll-mode)480 2137 y Fr(This)j(v)m(ariable)h(can)e(b)q(e) -i(set)e(to)g(either)h(`)p Fq(on)p Fr(')e(or)h(`)p Fq(off)p -Fr('.)28 b(Setting)19 b(it)g(to)f(`)p Fq(on)p Fr(')f(means)480 -2199 y(that)f(the)h(text)f(of)h(the)f(lines)j(that)d(y)o(ou)g(edit)i -(will)g(scroll)g(horizon)o(tally)f(on)g(a)g(single)480 -2261 y(screen)h(line)h(when)f(they)f(are)g(longer)h(than)f(the)g(width) -h(of)f(the)g(screen,)h(instead)g(of)480 2324 y(wrapping)e(on)o(to)e(a)h -(new)g(screen)h(line.)21 b(By)16 b(default,)f(this)h(v)m(ariable)g(is)g -(set)f(to)g(`)p Fq(off)p Fr('.)240 2421 y Fq(keymap)96 -b Fr(Sets)13 b(Readline's)i(idea)e(of)g(the)g(curren)o(t)f(k)o(eymap)h -(for)f(k)o(ey)h(binding)i(commands.)k(Ac-)480 2483 y(ceptable)d -Fq(keymap)e Fr(names)h(are)g Fq(emacs)p Fr(,)f Fq(emacs-standard)p -Fr(,)f Fq(emacs-meta)p Fr(,)g Fq(emacs-)480 2545 y(ctlx)p -Fr(,)18 b Fq(vi)p Fr(,)h Fq(vi-command)p Fr(,)e(and)i -Fq(vi-insert)p Fr(.)28 b Fq(vi)18 b Fr(is)h(equiv)m(alen)o(t)h(to)e -Fq(vi-command)p Fr(;)480 2608 y Fq(emacs)d Fr(is)i(equiv)m(alen)o(t)h -(to)d Fq(emacs-standard)p Fr(.)20 b(The)d(default)f(v)m(alue)i(is)e -Fq(emacs)p Fr(.)22 b(The)480 2670 y(v)m(alue)16 b(of)f(the)g -Fq(editing-mode)f Fr(v)m(ariable)j(also)e(a\013ects)f(the)h(default)h -(k)o(eymap.)p eop -7 8 bop 0 -58 a Fr(Chapter)15 b(1:)k(Command)c(Line)i(Editing)1227 -b(7)240 183 y Fq(mark-directories)480 246 y Fr(If)22 -b(set)g(to)g(`)p Fq(on)p Fr(',)g(completed)h(directory)f(names)h(ha)o -(v)o(e)e(a)h(slash)h(app)q(ended.)42 b(The)480 308 y(default)16 -b(is)f(`)p Fq(on)p Fr('.)240 388 y Fq(mark-modified-lines)480 -450 y Fr(This)f(v)m(ariable,)h(when)e(set)g(to)g(`)p -Fq(on)p Fr(',)f(sa)o(ys)h(to)g(displa)o(y)h(an)f(asterisk)g(\(`)p -Fq(*)p Fr('\))f(at)h(the)g(start)480 512 y(of)f(history)h(lines)h(whic) -o(h)f(ha)o(v)o(e)f(b)q(een)i(mo)q(di\014ed.)21 b(This)13 -b(v)m(ariable)h(is)f(`)p Fq(off)p Fr(')e(b)o(y)i(default.)240 -593 y Fq(input-meta)480 655 y Fr(If)21 b(set)g(to)g(`)p -Fq(on)p Fr(',)g(Readline)i(will)g(enable)g(eigh)o(t-bit)f(input)g(\(it) -f(will)i(not)d(strip)i(the)480 717 y(eigh)o(th)e(bit)f(from)f(the)i(c)o -(haracters)e(it)h(reads\),)h(regardless)f(of)f(what)h(the)g(terminal) -480 779 y(claims)d(it)g(can)f(supp)q(ort.)21 b(The)15 -b(default)h(v)m(alue)h(is)e(`)p Fq(off)p Fr('.)20 b(The)15 -b(name)g Fq(meta-flag)f Fr(is)480 842 y(a)h(synon)o(ym)g(for)f(this)i -(v)m(ariable.)240 922 y Fq(output-meta)480 984 y Fr(If)11 -b(set)f(to)g(`)p Fq(on)p Fr(',)g(Readline)j(will)g(displa)o(y)e(c)o -(haracters)f(with)h(the)g(eigh)o(th)g(bit)g(set)g(directly)480 -1046 y(rather)k(than)g(as)f(a)h(meta-pre\014xed)h(escap)q(e)g -(sequence.)21 b(The)16 b(default)f(is)h(`)p Fq(off)p -Fr('.)240 1126 y Fq(show-all-if-ambiguous)480 1189 y -Fr(This)f(alters)f(the)h(default)g(b)q(eha)o(vior)g(of)f(the)h -(completion)g(functions.)21 b(If)14 b(set)h(to)e(`)p -Fq(on)p Fr(',)480 1251 y(w)o(ords)18 b(whic)o(h)i(ha)o(v)o(e)f(more)f -(than)h(one)g(p)q(ossible)i(completion)f(cause)f(the)g(matc)o(hes)480 -1313 y(to)e(b)q(e)h(listed)h(immediately)g(instead)f(of)f(ringing)i -(the)e(b)q(ell.)29 b(The)18 b(default)g(v)m(alue)g(is)480 -1375 y(`)p Fq(off)p Fr('.)240 1456 y Fq(visible-stats)480 -1518 y Fr(If)c(set)g(to)f(`)p Fq(on)p Fr(',)f(a)i(c)o(haracter)f -(denoting)h(a)g(\014le's)g(t)o(yp)q(e)g(is)g(app)q(ended)i(to)d(the)h -(\014lename)480 1580 y(when)i(listing)g(p)q(ossible)h(completions.)k -(The)16 b(default)f(is)h(`)p Fq(off)p Fr('.)0 1660 y(Key)g(Bindings)240 -1722 y(The)k(syn)o(tax)f(for)g(con)o(trolling)i(k)o(ey)e(bindings)j(in) -e(the)g(init)h(\014le)g(is)f(simple.)35 b(First)19 b(y)o(ou)g(ha)o(v)o -(e)h(to)240 1785 y(kno)o(w)13 b(the)h(name)g(of)f(the)h(command)g(that) -f(y)o(ou)g(w)o(an)o(t)g(to)g(c)o(hange.)20 b(The)14 b(follo)o(wing)g -(pages)g(con)o(tain)240 1847 y(tables)i(of)f(the)h(command)g(name,)f -(the)h(default)g(k)o(eybinding,)i(and)e(a)f(short)g(description)i(of)f -(what)240 1909 y(the)f(command)g(do)q(es.)240 1980 y(Once)h(y)o(ou)e -(kno)o(w)g(the)h(name)g(of)f(the)h(command,)f(simply)i(place)g(the)f -(name)f(of)h(the)f(k)o(ey)h(y)o(ou)f(wish)240 2043 y(to)g(bind)j(the)e -(command)g(to,)f(a)g(colon,)i(and)f(then)g(the)g(name)g(of)g(the)g -(command)g(on)g(a)f(line)j(in)f(the)240 2105 y(init)h(\014le.)22 -b(The)16 b(name)g(of)f(the)h(k)o(ey)f(can)h(b)q(e)g(expressed)h(in)f -(di\013eren)o(t)g(w)o(a)o(ys,)f(dep)q(ending)i(on)f(whic)o(h)240 -2167 y(is)g(most)e(comfortable)h(for)g(y)o(ou.)240 2247 -y Fl(k)o(eyname)s Fr(:)k Fl(function-name)g Fr(or)c Fl(macro)480 -2310 y(k)o(eyname)j Fr(is)d(the)h(name)f(of)g(a)g(k)o(ey)g(sp)q(elled)i -(out)e(in)h(English.)21 b(F)l(or)15 b(example:)600 2370 -y Fq(Control-u:)22 b(universal-argument)600 2422 y(Meta-Rubout:)g -(backward-kill-word)600 2474 y(Control-o:)g(">)i(output")480 -2545 y Fr(In)12 b(the)g(ab)q(o)o(v)o(e)f(example,)h(`)p -Fq(C-u)p Fr(')f(is)h(b)q(ound)g(to)f(the)h(function)g -Fq(universal-argument)p Fr(,)480 2608 y(and)h(`)p Fq(C-o)p -Fr(')f(is)h(b)q(ound)h(to)f(run)g(the)g(macro)f(expressed)i(on)f(the)g -(righ)o(t)g(hand)g(side)h(\(that)480 2670 y(is,)h(to)g(insert)h(the)f -(text)g(`)p Fq(>)f(output)p Fr(')g(in)o(to)h(the)h(line\).)p -eop -8 9 bop 0 -58 a Fr(8)1472 b(GNU)15 b(Readline)i(Library)240 -183 y Fq(")p Fl(k)o(eyseq)q Fq(")p Fr(:)j Fl(function-name)e -Fr(or)d Fl(macro)480 246 y(k)o(eyseq)j Fr(di\013ers)f(from)f -Fl(k)o(eyname)k Fr(ab)q(o)o(v)o(e)c(in)i(that)e(strings)h(denoting)h -(an)f(en)o(tire)g(k)o(ey)480 308 y(sequence)i(can)f(b)q(e)h(sp)q -(eci\014ed,)i(b)o(y)d(placing)h(the)f(k)o(ey)g(sequence)h(in)g(double)h -(quotes.)480 370 y(Some)e(GNU)g(Emacs)f(st)o(yle)h(k)o(ey)g(escap)q(es) -g(can)g(b)q(e)h(used,)g(as)e(in)i(the)f(follo)o(wing)h(ex-)480 -432 y(ample,)c(but)h(the)f(sp)q(ecial)i(c)o(haracter)e(names)g(are)g -(not)f(recognized.)600 499 y Fq("\\C-u":)23 b(universal-argument)600 -551 y("\\C-x\\C-r":)f(re-read-init-file)600 603 y("\\e[11~":)h -("Function)f(Key)i(1")480 681 y Fr(In)13 b(the)g(ab)q(o)o(v)o(e)g -(example,)g(`)p Fq(C-u)p Fr(')f(is)h(b)q(ound)h(to)e(the)h(function)g -Fq(universal-argument)480 743 y Fr(\(just)g(as)f(it)i(w)o(as)e(in)i -(the)f(\014rst)g(example\),)h(`)p Fq(C-x)g(C-r)p Fr(')f(is)g(b)q(ound)i -(to)d(the)h(function)h Fq(re-)480 805 y(read-init-file)p -Fr(,)g(and)i(`)p Fq(ESC)e([)h(1)g(1)g(~)p Fr(')h(is)g(b)q(ound)h(to)f -(insert)g(the)g(text)f(`)p Fq(Function)480 867 y(Key)g(1)p -Fr('.)24 b(The)18 b(follo)o(wing)f(escap)q(e)h(sequences)g(are)f(a)o(v) -m(ailable)i(when)e(sp)q(ecifying)i(k)o(ey)480 930 y(sequences:)480 -1022 y Fq(\\C-)168 b Fr(con)o(trol)15 b(pre\014x)480 -1115 y Fq(\\M-)168 b Fr(meta)15 b(pre\014x)480 1208 y -Fq(\\e)192 b Fr(an)15 b(escap)q(e)h(c)o(haracter)480 -1300 y Fq(\\\\)192 b Fr(bac)o(kslash)480 1393 y Fq(\\")g(")480 -1485 y(\\')g(')480 1578 y Fr(When)14 b(en)o(tering)h(the)f(text)f(of)h -(a)f(macro,)g(single)j(or)d(double)i(quotes)f(should)h(b)q(e)f(used)480 -1640 y(to)g(indicate)j(a)e(macro)f(de\014nition.)22 b(Unquoted)15 -b(text)g(is)g(assumed)g(to)g(b)q(e)g(a)g(function)480 -1703 y(name.)21 b(Bac)o(kslash)16 b(will)h(quote)f(an)o(y)f(c)o -(haracter)g(in)h(the)g(macro)f(text,)g(including)j(`)p -Fq(")p Fr(')480 1765 y(and)12 b(`)p Fq(')p Fr('.)18 b(F)l(or)11 -b(example,)i(the)f(follo)o(wing)g(binding)i(will)f(mak)o(e)e(`)p -Fq(C-x)k(\\)p Fr(')c(insert)h(a)g(single)480 1827 y(`)p -Fq(\\)p Fr(')i(in)o(to)h(the)h(line:)600 1894 y Fq("\\C-x\\\\":)23 -b("\\\\")0 2126 y Fk(1.3.2)30 b(Conditional)15 b(Init)g(Constructs)62 -2266 y Fr(Readline)j(implemen)o(ts)e(a)f(facilit)o(y)h(similar)g(in)g -(spirit)g(to)f(the)g(conditional)i(compilation)f(features)f(of)g(the)g -(C)0 2328 y(prepro)q(cessor)f(whic)o(h)h(allo)o(ws)f(k)o(ey)g(bindings) 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y(writing)16 b(custom)f(completion)h(functions.)p -eop -37 38 bop 0 -58 a Fr(Chapter)15 b(2:)k(Programming)c(with)g(GNU)g -(Readline)994 b(37)1725 183 y(F)l(unction)-1899 b Fi(char)20 -b(*)f Fh(username)p 412 183 18 3 v 19 w(completion)p -705 183 V 21 w(function)k Fg(\()p Fq(char)14 b(*text,)g(int)h(state)p -Fg(\))120 246 y Fr(A)i(completion)h(generator)e(for)g(usernames.)24 -b Fl(text)18 b Fr(con)o(tains)e(a)h(partial)g(username)g(preceded)h(b)o -(y)120 308 y(a)f(random)g(c)o(haracter)f(\(usually)j(`)p -Fq(~)p Fr('\).)24 b(As)18 b(with)f(all)h(completion)h(generators,)d -Fl(state)j Fr(is)f(zero)f(on)120 370 y(the)e(\014rst)g(call)h(and)g -(non-zero)f(for)g(subsequen)o(t)h(calls.)0 618 y Fk(2.5.3)30 -b(Completion)15 b(V)-5 b(ariables)1736 793 y Fr(V)l(ariable)-1899 -b Fi(Function)20 b(*)g Fh(rl)p 316 793 V 21 w(completion)p -611 793 V 21 w(en)n(try)p 764 793 V 21 w(function)120 -856 y Fr(A)d(p)q(oin)o(ter)h(to)f(the)g(generator)f(function)i(for)f -Fq(completion_matches)c(\(\))p Fr(.)25 b Fq(NULL)17 b -Fr(means)g(to)g(use)120 918 y Fq(filename_entry_function)12 -b(\(\))p Fr(,)j(the)g(default)h(\014lename)g(completer.)1736 -1093 y(V)l(ariable)-1899 b Fi(CPPFunction)21 b(*)e Fh(rl)p -394 1093 V 21 w(attempted)p 674 1093 V 20 w(completion)p -968 1093 V 21 w(function)120 1156 y Fr(A)g(p)q(oin)o(ter)h(to)f(an)g -(alternativ)o(e)h(function)g(to)f(create)g(matc)o(hes.)32 -b(The)20 b(function)g(is)g(called)h(with)120 1218 y Fl(text)p -Fr(,)e Fl(start)p Fr(,)g(and)g Fl(end)p Fr(.)32 b Fl(start)19 -b Fr(and)g Fl(end)j Fr(are)c(indices)j(in)f Fq(rl_line_buffer)d -Fr(sa)o(ying)i(what)g(the)120 1280 y(b)q(oundaries)c(of)e -Fl(text)h Fr(are.)19 b(If)13 b(this)h(function)g(exists)g(and)g -(returns)f Fq(NULL)p Fr(,)g(or)g(if)h(this)f(v)m(ariable)i(is)f(set)120 -1342 y(to)h Fq(NULL)p Fr(,)f(then)i Fq(rl_complete)e(\(\))h -Fr(will)i(call)g(the)e(v)m(alue)i(of)e Fq(rl_completion_entry_funct)o -(ion)120 1405 y Fr(to)g(generate)f(matc)o(hes,)h(otherwise)g(the)h 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Fr(,)g(if)h(there)f(is)h(only)f(one)h(completion)g -(matc)o(h,)f(or)120 1954 y Fq(MULT_MATCH)p Fr(.)d(Some)13 -b(functions)g(use)h(this)f(to)f(decide)j(whether)e(or)f(not)h(to)f -(insert)i(a)e(closing)i(quote)120 2016 y(c)o(haracter.)36 -b(The)21 b Fl(quote)p 565 2016 V 16 w(p)q(oin)o(ter)k -Fr(is)c(a)g(p)q(oin)o(ter)g(to)f(an)o(y)h(op)q(ening)h(quote)f(c)o -(haracter)f(the)h(user)120 2078 y(t)o(yp)q(ed.)f(Some)15 -b(functions)h(c)o(ho)q(ose)g(to)e(reset)h(this)h(c)o(haracter.)1736 -2254 y(V)l(ariable)-1899 b Fi(CPFunction)21 b(*)e Fh(rl)p -368 2254 18 3 v 21 w(\014lename)p 597 2254 V 20 w(dequoting)p -864 2254 V 21 w(function)120 2316 y Fr(A)f(p)q(oin)o(ter)g(to)f(a)g -(function)h(that)f(will)i(remo)o(v)o(e)e(application-sp)q(eci\014c)k -(quoting)d(c)o(haracters)f(from)120 2378 y(a)h(\014lename)i(b)q(efore)f -(completion)h(is)f(attempted,)g(so)f(those)h(c)o(haracters)f(do)g(not)h -(in)o(terfere)g(with)120 2440 y(matc)o(hing)13 b(the)g(text)f(against)g -(names)h(in)g(the)g(\014lesystem.)20 b(It)13 b(is)g(called)h(with)f -Fl(text)p Fr(,)g(the)f(text)h(of)f(the)120 2503 y(w)o(ord)i(to)g(b)q(e) -h(dequoted,)g(and)g Fl(quote)p 757 2503 14 2 v 16 w(c)o(har)p -Fr(,)f(whic)o(h)i(is)f(the)g(quoting)g(c)o(haracter)f(that)f(delimits)k -(the)120 2565 y(\014lename)d(\(usually)g(`)p Fq(')p Fr(')e(or)g(`)p -Fq(")p Fr('\).)18 b(If)13 b Fl(quote)p 838 2565 V 16 -w(c)o(har)j Fr(is)e(zero,)e(the)h(\014lename)h(w)o(as)e(not)h(in)h(an)f -(em)o(b)q(edded)120 2627 y(string.)p eop -38 39 bop 0 -58 a Fr(38)1449 b(GNU)15 b(Readline)i(Library)1736 -183 y(V)l(ariable)-1899 b Fi(Function)20 b(*)g Fh(rl)p -316 183 18 3 v 21 w(c)n(har)p 444 183 V 20 w(is)p 502 -183 V 22 w(quoted)p 695 183 V 20 w(p)120 246 y Fr(A)d(p)q(oin)o(ter)g -(to)f(a)g(function)i(to)e(call)h(that)f(determines)i(whether)f(or)f -(not)g(a)h(sp)q(eci\014c)h(c)o(haracter)e(in)120 308 -y(the)c(line)i(bu\013er)e(is)h(quoted,)f(according)h(to)e(whatev)o(er)h 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y(V)l(ariable)-1899 b Fi(char)20 -b(*)f Fh(rl)p 211 1120 V 21 w(basic)p 355 1120 V 21 w(w)n(ord)p -500 1120 V 21 w(break)p 661 1120 V 20 w(c)n(haracters)120 -1182 y Fr(The)12 b(basic)g(list)h(of)e(c)o(haracters)g(that)g(signal)h -(a)g(break)f(b)q(et)o(w)o(een)h(w)o(ords)f(for)g(the)h(completer)g -(routine.)120 1244 y(The)17 b(default)h(v)m(alue)g(of)e(this)i(v)m -(ariable)g(is)g(the)f(c)o(haracters)f(whic)o(h)h(break)g(w)o(ords)g -(for)f(completion)120 1306 y(in)g(Bash,)f(i.e.,)g Fq(")g -(\\t\\n\\"\\\\'`@$><=;|&{\(")p Fr(.)1736 1494 y(V)l(ariable)-1899 -b Fi(char)20 b(*)f Fh(rl)p 211 1494 V 21 w(basic)p 355 -1494 V 21 w(quote)p 515 1494 V 21 w(c)n(haracters)120 -1557 y Fr(List)d(of)f(quote)g(c)o(haracters)f(whic)o(h)i(can)f(cause)h -(a)f(w)o(ord)f(break.)1736 1745 y(V)l(ariable)-1899 b -Fi(char)20 b(*)f Fh(rl)p 211 1745 V 21 w(completer)p -480 1745 V 21 w(w)n(ord)p 625 1745 V 20 w(break)p 785 -1745 V 20 w(c)n(haracters)120 1807 y Fr(The)f(list)h(of)e(c)o -(haracters)g(that)g(signal)i(a)f(break)f(b)q(et)o(w)o(een)h(w)o(ords)g -(for)f Fq(rl_complete_internal)120 1869 y(\(\))p Fr(.)j(The)15 -b(default)h(list)g(is)f(the)h(v)m(alue)g(of)f Fq -(rl_basic_word_break_charac)o(ters)p Fr(.)1736 2057 y(V)l(ariable)-1899 -b Fi(char)20 b(*)f Fh(rl)p 211 2057 V 21 w(completer)p -480 2057 V 21 w(quote)p 640 2057 V 21 w(c)n(haracters)120 -2120 y Fr(List)j(of)e(c)o(haracters)g(whic)o(h)i(can)f(b)q(e)h(used)f -(to)f(quote)h(a)g(substring)g(of)f(the)h(line.)39 b(Completion)120 -2182 y(o)q(ccurs)17 b(on)f(the)h(en)o(tire)g(substring,)g(and)f(within) -i(the)e(substring)h Fq(rl_completer_word_break_)120 2244 -y(characters)i Fr(are)g(treated)h(as)f(an)o(y)h(other)g(c)o(haracter,)g -(unless)h(they)f(also)g(app)q(ear)g(within)i(this)120 -2306 y(list.)1736 2494 y(V)l(ariable)-1899 b Fi(char)20 -b(*)f Fh(rl)p 211 2494 V 21 w(\014lename)p 440 2494 V -20 w(quote)p 599 2494 V 21 w(c)n(haracters)120 2557 y -Fr(A)g(list)h(of)e(c)o(haracters)g(that)g(cause)h(a)g(\014lename)h(to)e -(b)q(e)i(quoted)e(b)o(y)h(the)g(completer)h(when)f(they)120 -2619 y(app)q(ear)c(in)h(a)f(completed)h(\014lename.)21 -b(The)16 b(default)g(is)f(empt)o(y)l(.)p eop -39 40 bop 0 -58 a Fr(Chapter)15 b(2:)k(Programming)c(with)g(GNU)g -(Readline)994 b(39)1736 183 y(V)l(ariable)-1899 b Fi(char)20 -b(*)f Fh(rl)p 211 183 18 3 v 21 w(sp)r(ecial)p 398 183 -V 22 w(pre\014xes)120 246 y Fr(The)d(list)h(of)e(c)o(haracters)g(that)g -(are)h(w)o(ord)f(break)h(c)o(haracters,)f(but)h(should)h(b)q(e)f(left)g -(in)h Fl(text)f Fr(when)120 308 y(it)f(is)g(passed)g(to)f(the)g -(completion)i(function.)k(Programs)14 b(can)g(use)h(this)g(to)f(help)i -(determine)g(what)120 370 y(kind)h(of)f(completing)i(to)e(do.)23 -b(F)l(or)16 b(instance,)h(Bash)f(sets)g(this)h(v)m(ariable)h(to)e -Fq(")p Fr($)p Fq(@")f Fr(so)h(that)g(it)h(can)120 432 -y(complete)f(shell)h(v)m(ariables)f(and)g(hostnames.)1736 -587 y(V)l(ariable)-1899 b Fi(int)20 b Fh(rl)p 140 587 -V 21 w(completion)p 435 587 V 21 w(app)r(end)p 640 587 -V 19 w(c)n(haracter)120 650 y Fr(When)f(a)g(single)h(completion)g -(alternativ)o(e)f(matc)o(hes)g(at)f(the)h(end)g(of)g(the)g(command)f -(line,)k(this)120 712 y(c)o(haracter)12 b(is)i(app)q(ended)h(to)d(the)i -(inserted)g(completion)g(text.)19 b(The)13 b(default)h(is)f(a)g(space)h -(c)o(haracter)120 774 y(\(`)g('\).)21 b(Setting)c(this)f(to)f(the)h(n)o -(ull)h(c)o(haracter)e(\(`)p Fq(\\0)p Fr('\))f(prev)o(en)o(ts)i(an)o -(ything)g(b)q(eing)h(app)q(ended)g(auto-)120 836 y(matically)l(.)26 -b(This)17 b(can)g(b)q(e)g(c)o(hanged)g(in)g(custom)g(completion)h -(functions)f(to)f(pro)o(vide)h(the)g(\\most)120 899 y(sensible)i(w)o -(ord)d(separator)g(c)o(haracter")g(according)h(to)f(an)h -(application-sp)q(eci\014)q(c)j(command)c(line)120 961 -y(syn)o(tax)e(sp)q(eci\014cation.)1736 1116 y(V)l(ariable)-1899 -b Fi(int)20 b Fh(rl)p 140 1116 V 21 w(ignore)p 316 1116 -V 20 w(completion)p 610 1116 V 21 w(duplicates)120 1178 -y Fr(If)15 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Fe(.)j(.)e(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)17 b Ff(1)0 1011 -y Fp(K)0 1077 y Ff(kill)e(ring)5 b Fe(.)i(.)f(.)g(.)g(.)g(.)g(.)g(.)g -(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.) -f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g -(.)g(.)17 b Ff(3)1015 430 y(killin)q(g)f(text)t Fe(.)6 -b(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)h(.)f(.)g(.)g(.)g(.)17 b Ff(3)1015 579 y Fp(N)1015 -646 y Ff(notation,)e(readline)7 b Fe(.)h(.)f(.)f(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)20 b Ff(2)1015 795 -y Fp(R)1015 861 y Ff(readline,)15 b(function)8 b Fe(.)g(.)e(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) 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Fd(backward-w)o(or)o(d)10 b(\(M-b\))c Fe(.)t(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)19 b Ff(12)0 1265 y Fd(beginning-)o(of)o(-hi)o -(st)o(ory)9 b(\(M-<\))c Fe(.)g(.)h(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)18 b Ff(13)0 -1323 y Fd(beginning-)o(of)o(-li)o(ne)9 b(\(C-a\))g Fe(.)c(.)h(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)22 b Ff(12)0 1381 y(b)q(ell-st)o(yle)s Fe(.)9 -b(.)d(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)16 b Ff(5)0 1498 y Fp(C)0 -1565 y Fd(call-last-)o(kb)o(d-m)o(ac)o(ro)9 b(\(C-x)j(e\))7 -b Fe(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -h(.)f(.)g(.)g(.)20 b Ff(17)0 1623 y Fd(capitalize)o(-w)o(ord)9 -b(\(M-c\))s 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Fe(.)s(.)e(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)21 b Ff(19)0 2031 y Fd(redraw-cur)o(re)o(nt-)o(li)o(ne)9 -b(\(\))h Fe(.)c(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)23 b Ff(12)0 -2089 y Fd(reverse-se)o(ar)o(ch-)o(hi)o(sto)o(ry)9 b(\(C-r\))h -Fe(.)c(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g -(.)g(.)24 b Ff(13)0 2147 y Fd(revert-lin)o(e)10 b(\(M-r\))e -Fe(.)t(.)e(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)21 -b Ff(17)0 2205 y Fd(rl)p 42 2205 V 13 w(add)p 115 2205 -V 13 w(defun)8 b Fe(.)d(.)h(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.) -f(.)g(.)g(.)g(.)g(.)g(.)g(.)21 b Ff(25)0 2263 y Fd(rl)p -42 2263 V 13 w(add)p 115 2263 V 13 w(undo)8 b Fe(.)e(.)g(.)g(.)h(.)f(.) -g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)22 -b Ff(29)0 2321 y Fd(rl)p 42 2321 V 13 w(attempted)p 235 -2321 V 11 w(completion)p 445 2321 V 10 w(function)15 -b Fe(.)6 b(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)17 -b Ff(37)0 2379 y Fd(rl)p 42 2379 V 13 w(basic)p 155 2379 -V 13 w(quote)p 268 2379 V 12 w(character)o(s)e Fe(.)6 -b(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)18 b Ff(38)0 2438 y Fd(rl)p 42 2438 -V 13 w(basic)p 155 2438 V 13 w(word)p 248 2438 V 12 w(break)p -360 2438 V 12 w(characters)h Fe(.)6 b(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)23 b Ff(38)0 2496 y Fd(rl)p -42 2496 V 13 w(begin)p 155 2496 V 13 w(undo)p 248 2496 -V 12 w(group)9 b Fe(.)d(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)23 -b Ff(28)0 2554 y Fd(rl)p 42 2554 V 13 w(bind)p 135 2554 -V 13 w(key)8 b Fe(.)e(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)22 b Ff(26)0 2612 y Fd(rl)p -42 2612 V 13 w(bind)p 135 2612 V 13 w(key)p 208 2612 -V 13 w(in)p 261 2612 V 13 w(map)6 b Fe(.)f(.)h(.)g(.)g(.)g(.)h(.)f(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)19 b Ff(26)0 2670 y Fd(rl)p 42 -2670 V 13 w(binding)p 195 2670 V 12 w(keymap)14 b Fe(.)6 -b(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)17 -b Ff(24)1015 183 y Fd(rl)p 1057 183 V 14 w(callback)p -1231 183 V 11 w(handler)p 1382 183 V 11 w(install)9 b -Fe(.)t(.)d(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f -(.)g(.)g(.)g(.)22 b Ff(32)1015 241 y Fd(rl)p 1057 241 -V 14 w(callback)p 1231 241 V 11 w(handler)p 1382 241 -V 11 w(remove)8 b Fe(.)e(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)23 b Ff(33)1015 299 -y Fd(rl)p 1057 299 V 14 w(callback)p 1231 299 V 11 w(read)p -1322 299 V 12 w(char)8 b Fe(.)d(.)h(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)21 -b Ff(32)1015 358 y Fd(rl)p 1057 358 V 14 w(char)p 1151 -358 V 12 w(is)p 1203 358 V 14 w(quoted)p 1337 358 V 12 -w(p)e Fe(.)6 b(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)20 -b Ff(37)1015 416 y Fd(rl)p 1057 416 V 14 w(clear)p 1171 -416 V 12 w(message)s Fe(.)t(.)6 b(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)h(.)f(.)16 b Ff(30)1015 474 y Fd(rl)p 1057 -474 V 14 w(complete)7 b Fe(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.) -f(.)g(.)g(.)g(.)g(.)g(.)23 b Ff(35,)13 b(36)1015 532 -y Fd(rl)p 1057 532 V 14 w(complete)p 1231 532 V 11 w(internal)6 -b Fe(.)s(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)20 b -Ff(35)1015 590 y Fd(rl)p 1057 590 V 14 w(completer)p -1250 590 V 10 w(quote)p 1361 590 V 13 w(character)o(s)e -Fe(.)6 b(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)22 b Ff(38)1015 648 y Fd(rl)p 1057 648 V 14 w(completer)p -1250 648 V 10 w(word)p 1341 648 V 13 w(break)p 1454 648 -V 12 w(characters)14 b Fe(.)6 b(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g -(.)g(.)18 b Ff(38)1015 706 y Fd(rl)p 1057 706 V 14 w(completio)o(n)p -1270 706 V 11 w(append)p 1401 706 V 12 w(character)e -Fe(.)7 b(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.) -20 b Ff(39)1015 764 y Fd(rl)p 1057 764 V 14 w(completio)o(n)p -1270 764 V 11 w(entry)p 1381 764 V 12 w(function)14 b -Fe(.)7 b(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)18 -b Ff(35,)13 b(37)1015 823 y Fd(rl)p 1057 823 V 14 w(completio)o(n)p -1270 823 V 11 w(query)p 1381 823 V 12 w(items)j Fe(.)6 -b(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)h(.)f(.)g(.)18 b Ff(38)1015 881 y Fd(rl)p 1057 -881 V 14 w(copy)p 1151 881 V 12 w(keymap)6 b Fe(.)t(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)19 b -Ff(25)1015 939 y Fd(rl)p 1057 939 V 14 w(copy)p 1151 -939 V 12 w(text)8 b Fe(.)d(.)h(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)21 b Ff(30)1015 997 y -Fd(rl)p 1057 997 V 14 w(delete)p 1191 997 V 12 w(text)6 -b Fe(.)t(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)19 b Ff(30)1015 1055 y Fd(rl)p 1057 1055 V 14 -w(directory)p 1250 1055 V 10 w(completion)p 1461 1055 -V 11 w(hook)i Fe(.)6 b(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g -(.)g(.)g(.)g(.)g(.)g(.)23 b Ff(40)1015 1113 y Fd(rl)p -1057 1113 V 14 w(discard)p 1211 1113 V 11 w(keymap)8 -b Fe(.)e(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)24 -b Ff(25)1015 1171 y Fd(rl)p 1057 1171 V 14 w(do)p 1111 -1171 V 13 w(undo)9 b Fe(.)d(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)24 b Ff(29)1015 -1229 y Fd(rl)p 1057 1229 V 14 w(done)17 b Fe(.)6 b(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)19 b Ff(23)1015 1287 y Fd(rl)p 1057 1287 V 14 -w(end)f Fe(.)6 b(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)20 b Ff(22)1015 -1346 y Fd(rl)p 1057 1346 V 14 w(end)p 1131 1346 V 13 -w(undo)p 1224 1346 V 12 w(group)5 b Fe(.)t(.)h(.)g(.)g(.)g(.)g(.)h(.)f -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)g(.)18 b Ff(29)1015 1404 y Fd(rl)p -1057 1404 V 14 w(event)p 1171 1404 V 12 w(hook)i Fe(.)6 -b(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h -(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.) -22 b Ff(24)1015 1462 y Fd(rl)p 1057 1462 V 14 w(executing)p -1250 1462 V 10 w(keymap)f Fe(.)6 b(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.) -g(.)23 b Ff(24)1015 1520 y Fd(rl)p 1057 1520 V 14 w(filename)p -1231 1520 V 11 w(completio)o(n)p 1441 1520 V 11 w(desired)17 -b Fe(.)7 b(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h -(.)20 b Ff(39)1015 1578 y Fd(rl)p 1057 1578 V 14 w(filename)p -1231 1578 V 11 w(dequoting)p 1421 1578 V 11 w(function)c -Fe(.)7 b(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.) -20 b Ff(37)1015 1636 y Fd(rl)p 1057 1636 V 14 w(filename)p -1231 1636 V 11 w(quote)p 1342 1636 V 12 w(characters)f -Fe(.)6 b(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.) -g(.)g(.)23 b Ff(38)1015 1694 y Fd(rl)p 1057 1694 V 14 -w(filename)p 1231 1694 V 11 w(quoting)p 1382 1694 V 11 -w(desired)e Fe(.)7 b(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)h(.)f(.)g(.)24 b Ff(39)1015 1752 y Fd(rl)p -1057 1752 V 14 w(filename)p 1231 1752 V 11 w(quoting)p -1382 1752 V 11 w(function)c Fe(.)6 b(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)23 b Ff(37)1015 1810 -y Fd(rl)p 1057 1810 V 14 w(forced)p 1191 1810 V 12 w(update)p -1323 1810 V 11 w(display)t Fe(.)t(.)6 b(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)17 -b Ff(30)1015 1869 y Fd(rl)p 1057 1869 V 14 w(function)p 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Fe(.)t(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.) -g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)19 b Ff(30)p eop -55 56 bop 0 -58 a Fr(F)l(unction)16 b(and)f(V)l(ariable)i(Index)1337 -b(55)0 183 y Fd(rl)p 42 183 12 2 v 13 w(instream)19 b -Fe(.)6 b(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)22 b Ff(23)0 241 y Fd(rl)p 42 241 V 13 -w(invoking)p 215 241 V 11 w(keyseqs)8 b Fe(.)t(.)e(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.) -g(.)g(.)g(.)g(.)g(.)21 b Ff(27)0 299 y Fd(rl)p 42 299 -V 13 w(invoking)p 215 299 V 11 w(keyseqs)p 366 299 V -12 w(in)p 418 299 V 13 w(map)t Fe(.)5 b(.)i(.)f(.)g(.)g(.)g(.)g(.)g(.)g -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)g(.)17 -b Ff(27)0 358 y Fd(rl)p 42 358 V 13 w(kill)p 135 358 -V 13 w(text)8 b 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-h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)g(.)27 b -Fr(34)299 291 y(2.5.1)44 b(Ho)o(w)14 b(Completing)i(W)l(orks)9 -b Fa(.)f(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.) -h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)25 -b Fr(34)299 353 y(2.5.2)44 b(Completion)16 b(F)l(unctions)6 -b Fa(.)i(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.) -f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)21 -b Fr(35)299 415 y(2.5.3)44 b(Completion)16 b(V)l(ariables)11 -b Fa(.)e(.)e(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.) -h(.)f(.)h(.)f(.)h(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)26 -b Fr(37)299 477 y(2.5.4)44 b(A)15 b(Short)g(Completion)h(Example)t -Fa(.)8 b(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.) -f(.)h(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)19 b Fr(40)0 602 -y Fp(Concept)j(Index)11 b Fb(.)g(.)f(.)g(.)g(.)g(.)g(.)g(.)f(.)h(.)g(.) -g(.)g(.)g(.)g(.)g(.)g(.)f(.)h(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)f(.)h -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)f(.)h(.)g(.)g(.)34 b Fp(51)0 -742 y(F)-6 b(unction)25 b(and)d(V)-6 b(ariable)24 b(Index)17 -b Fb(.)10 b(.)g(.)g(.)g(.)g(.)f(.)h(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)f(.)h -(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)g(.)38 b Fp(53)p eop end -userdict /end-hook known{end-hook}if