/usr/share/doc/libreadline5/examples/rl.c is in libreadline-gplv2-dev 5.2-11.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 | /*
* rl - command-line interface to read a line from the standard input
* (or another fd) using readline.
*
* usage: rl [-p prompt] [-u unit] [-d default] [-n nchars]
*/
/* Copyright (C) 1987-2002 Free Software Foundation, Inc.
This file is part of the GNU Readline Library, a library for
reading lines of text with interactive input and history editing.
The GNU Readline Library is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2, or
(at your option) any later version.
The GNU Readline Library is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty
of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
The GNU General Public License is often shipped with GNU software, and
is generally kept in a file called COPYING or LICENSE. If you do not
have a copy of the license, write to the Free Software Foundation,
59 Temple Place, Suite 330, Boston, MA 02111 USA. */
#if defined (HAVE_CONFIG_H)
# include <config.h>
#endif
#include <stdio.h>
#include <sys/types.h>
#ifdef HAVE_STDLIB_H
# include <stdlib.h>
#else
extern void exit();
#endif
#if defined (READLINE_LIBRARY)
# include "posixstat.h"
# include "readline.h"
# include "history.h"
#else
# include <sys/stat.h>
# include <readline/readline.h>
# include <readline/history.h>
#endif
extern int optind;
extern char *optarg;
#if !defined (strchr) && !defined (__STDC__)
extern char *strrchr();
#endif
static char *progname;
static char *deftext;
static int
set_deftext ()
{
if (deftext)
{
rl_insert_text (deftext);
deftext = (char *)NULL;
rl_startup_hook = (rl_hook_func_t *)NULL;
}
return 0;
}
static void
usage()
{
fprintf (stderr, "%s: usage: %s [-p prompt] [-u unit] [-d default] [-n nchars]\n",
progname, progname);
}
int
main (argc, argv)
int argc;
char **argv;
{
char *temp, *prompt;
struct stat sb;
int opt, fd, nch;
FILE *ifp;
progname = strrchr(argv[0], '/');
if (progname == 0)
progname = argv[0];
else
progname++;
/* defaults */
prompt = "readline$ ";
fd = nch = 0;
deftext = (char *)0;
while ((opt = getopt(argc, argv, "p:u:d:n:")) != EOF)
{
switch (opt)
{
case 'p':
prompt = optarg;
break;
case 'u':
fd = atoi(optarg);
if (fd < 0)
{
fprintf (stderr, "%s: bad file descriptor `%s'\n", progname, optarg);
exit (2);
}
break;
case 'd':
deftext = optarg;
break;
case 'n':
nch = atoi(optarg);
if (nch < 0)
{
fprintf (stderr, "%s: bad value for -n: `%s'\n", progname, optarg);
exit (2);
}
break;
default:
usage ();
exit (2);
}
}
if (fd != 0)
{
if (fstat (fd, &sb) < 0)
{
fprintf (stderr, "%s: %d: bad file descriptor\n", progname, fd);
exit (1);
}
ifp = fdopen (fd, "r");
rl_instream = ifp;
}
if (deftext && *deftext)
rl_startup_hook = set_deftext;
if (nch > 0)
rl_num_chars_to_read = nch;
temp = readline (prompt);
/* Test for EOF. */
if (temp == 0)
exit (1);
printf ("%s\n", temp);
exit (0);
}
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