157 lines
3.1 KiB
C
157 lines
3.1 KiB
C
/*
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* rl - command-line interface to read a line from the standard input
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* (or another fd) using readline.
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*
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* usage: rl [-p prompt] [-u unit] [-d default] [-n nchars]
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*/
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/* Copyright (C) 1987-2009 Free Software Foundation, Inc.
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This file is part of the GNU Readline Library (Readline), a library for
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reading lines of text with interactive input and history editing.
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Readline is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Readline is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Readline. If not, see <http://www.gnu.org/licenses/>.
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*/
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#if defined (HAVE_CONFIG_H)
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# include <config.h>
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#endif
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#include <stdio.h>
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#include <sys/types.h>
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#ifdef HAVE_STDLIB_H
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# include <stdlib.h>
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#else
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extern void exit();
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#endif
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#if defined (READLINE_LIBRARY)
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# include "posixstat.h"
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# include "readline.h"
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# include "history.h"
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#else
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# include <sys/stat.h>
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# include <readline/readline.h>
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# include <readline/history.h>
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#endif
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extern int optind;
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extern char *optarg;
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#if !defined (strchr) && !defined (__STDC__)
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extern char *strrchr();
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#endif
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static char *progname;
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static char *deftext;
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static int
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set_deftext ()
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{
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if (deftext)
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{
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rl_insert_text (deftext);
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deftext = (char *)NULL;
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rl_startup_hook = (rl_hook_func_t *)NULL;
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}
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return 0;
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}
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static void
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usage()
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{
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fprintf (stderr, "%s: usage: %s [-p prompt] [-u unit] [-d default] [-n nchars]\n",
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progname, progname);
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}
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int
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main (argc, argv)
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int argc;
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char **argv;
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{
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char *temp, *prompt;
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struct stat sb;
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int opt, fd, nch;
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FILE *ifp;
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progname = strrchr(argv[0], '/');
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if (progname == 0)
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progname = argv[0];
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else
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progname++;
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/* defaults */
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prompt = "readline$ ";
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fd = nch = 0;
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deftext = (char *)0;
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while ((opt = getopt(argc, argv, "p:u:d:n:")) != EOF)
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{
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switch (opt)
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{
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case 'p':
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prompt = optarg;
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break;
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case 'u':
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fd = atoi(optarg);
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if (fd < 0)
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{
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fprintf (stderr, "%s: bad file descriptor `%s'\n", progname, optarg);
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exit (2);
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}
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break;
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case 'd':
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deftext = optarg;
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break;
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case 'n':
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nch = atoi(optarg);
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if (nch < 0)
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{
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fprintf (stderr, "%s: bad value for -n: `%s'\n", progname, optarg);
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exit (2);
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}
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break;
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default:
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usage ();
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exit (2);
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}
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}
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if (fd != 0)
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{
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if (fstat (fd, &sb) < 0)
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{
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fprintf (stderr, "%s: %d: bad file descriptor\n", progname, fd);
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exit (1);
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}
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ifp = fdopen (fd, "r");
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rl_instream = ifp;
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}
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if (deftext && *deftext)
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rl_startup_hook = set_deftext;
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if (nch > 0)
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rl_num_chars_to_read = nch;
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temp = readline (prompt);
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/* Test for EOF. */
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if (temp == 0)
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exit (1);
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printf ("%s\n", temp);
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exit (0);
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}
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