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-rw-r--r--lib/readline/examples/rl.c158
1 files changed, 158 insertions, 0 deletions
diff --git a/lib/readline/examples/rl.c b/lib/readline/examples/rl.c
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+++ b/lib/readline/examples/rl.c
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+/*
+ * 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) 1987-2009 Free Software Foundation, Inc.
+
+ This file is part of the GNU Readline Library (Readline), a library for
+ reading lines of text with interactive input and history editing.
+
+ Readline 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 3 of the License, or
+ (at your option) any later version.
+
+ Readline 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.
+
+ You should have received a copy of the GNU General Public License
+ along with Readline. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#if defined (HAVE_CONFIG_H)
+# include <config.h>
+#endif
+
+#include <unistd.h>
+#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);
+}