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comparison readline/shell.c @ 2996:9d4e3a9de17e

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[project @ 1997-05-22 20:58:07 by jwe]
author jwe
date Thu, 22 May 1997 20:59:27 +0000
parents
children f7e4a95916f2
comparison
equal deleted inserted replaced
2995:953ce4558485 2996:9d4e3a9de17e
1 /* shell.c -- readline utility functions that are normally provided by
2 bash when readline is linked as part of the shell. */
3
4 /* Copyright (C) 1997 Free Software Foundation, Inc.
5
6 This file is part of the GNU Readline Library, a library for
7 reading lines of text with interactive input and history editing.
8
9 The GNU Readline Library is free software; you can redistribute it
10 and/or modify it under the terms of the GNU General Public License
11 as published by the Free Software Foundation; either version 1, or
12 (at your option) any later version.
13
14 The GNU Readline Library is distributed in the hope that it will be
15 useful, but WITHOUT ANY WARRANTY; without even the implied warranty
16 of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 The GNU General Public License is often shipped with GNU software, and
20 is generally kept in a file called COPYING or LICENSE. If you do not
21 have a copy of the license, write to the Free Software Foundation,
22 675 Mass Ave, Cambridge, MA 02139, USA. */
23 #define READLINE_LIBRARY
24
25 #if defined (HAVE_CONFIG_H)
26 # include <config.h>
27 #endif
28
29 #if defined (HAVE_UNISTD_H)
30 # include <unistd.h>
31 #endif /* HAVE_UNISTD_H */
32
33 #if defined (HAVE_STDLIB_H)
34 # include <stdlib.h>
35 #else
36 # include "ansi_stdlib.h"
37 #endif /* HAVE_STDLIB_H */
38
39 extern char *xmalloc (), *xrealloc ();
40
41 #if !defined (SHELL)
42
43 #ifdef savestring
44 #undef savestring
45 #endif
46
47 /* Backwards compatibility, now that savestring has been removed from
48 all `public' readline header files. */
49 char *
50 savestring (s)
51 char *s;
52 {
53 return ((char *)strcpy (xmalloc (1 + (int)strlen (s)), (s)));
54 }
55
56 /* Does shell-like quoting using single quotes. */
57 char *
58 single_quote (string)
59 char *string;
60 {
61 register int c;
62 char *result, *r, *s;
63
64 result = (char *)xmalloc (3 + (3 * strlen (string)));
65 r = result;
66 *r++ = '\'';
67
68 for (s = string; s && (c = *s); s++)
69 {
70 *r++ = c;
71
72 if (c == '\'')
73 {
74 *r++ = '\\'; /* insert escaped single quote */
75 *r++ = '\'';
76 *r++ = '\''; /* start new quoted string */
77 }
78 }
79
80 *r++ = '\'';
81 *r = '\0';
82
83 return (result);
84 }
85
86 /* Set the environment variables LINES and COLUMNS to lines and cols,
87 respectively. */
88 void
89 set_lines_and_columns (lines, cols)
90 int lines, cols;
91 {
92 char *b;
93
94 #if defined (HAVE_PUTENV)
95 b = xmalloc (24);
96 sprintf (b, "LINES=%d", lines);
97 putenv (b);
98 b = xmalloc (24);
99 sprintf (b, "COLUMNS=%d", cols);
100 putenv (b);
101 #else /* !HAVE_PUTENV */
102 # if defined (HAVE_SETENV)
103 b = xmalloc (8);
104 sprintf (b, "%d", lines);
105 setenv ("LINES", b, 1);
106 b = xmalloc (8);
107 sprintf (b, "%d", cols);
108 setenv ("COLUMNS", b, 1);
109 # endif /* HAVE_SETENV */
110 #endif /* !HAVE_PUTENV */
111 }
112
113 char *
114 get_env_value (varname)
115 char *varname;
116 {
117 return ((char *)getenv (varname));
118 }
119
120 #else /* SHELL */
121 extern char *get_string_value ();
122
123 char *
124 get_env_value (varname)
125 char *varname;
126 {
127 return get_string_value (varname);
128 }
129 #endif /* SHELL */