--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/readline/examples/fileman.c	Thu May 22 20:59:27 1997 +0000
@@ -0,0 +1,450 @@
+/* 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. */
+/*
+ * Remove the next line if you're compiling this against an installed
+ * libreadline.a
+ */
+#define READLINE_LIBRARY
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <sys/types.h>
+#ifdef HAVE_SYS_FILE_H
+#include <sys/file.h>
+#endif
+#include <sys/stat.h>
+
+#include <stdio.h>
+#include <errno.h>
+
+#if defined (HAVE_STRING_H)
+#  include <string.h>
+#else /* !HAVE_STRING_H */
+#  include <strings.h>
+#endif /* !HAVE_STRING_H */
+
+#ifdef READLINE_LIBRARY
+#  include "readline.h"
+#  include "history.h"
+#else
+#  include <readline/readline.h>
+#  include <readline/history.h>
+#endif
+
+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)
+     char *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);
+}