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- /* Utility to accept --help and --version options as unobtrusively as possible.
- Copyright (C) 1993, 1994, 1998 Free Software Foundation, Inc.
- This program 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.
- This program 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 this program; if not, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
- /* Written by Jim Meyering. */
- #if HAVE_CONFIG_H
- # include <config.h>
- #endif
- #include <stdio.h>
- #include <stdlib.h>
- #include <getopt.h>
- #include "closeout.h"
- #include "long-options.h"
- static struct option const long_options[] =
- {
- {"help", no_argument, 0, 'h'},
- {"version", no_argument, 0, 'v'},
- {0, 0, 0, 0}
- };
- /* Process long options --help and --version, but only if argc == 2.
- Be careful not to gobble up `--'. */
- void
- parse_long_options (argc, argv, command_name, package, version, usage)
- int argc;
- char **argv;
- const char *command_name;
- const char *package;
- const char *version;
- void (*usage)(int);
- {
- int c;
- int saved_opterr;
- saved_opterr = opterr;
- /* Don't print an error message for unrecognized options. */
- opterr = 0;
- if (argc == 2
- && (c = getopt_long (argc, argv, "+", long_options, NULL)) != -1)
- {
- switch (c)
- {
- case 'h':
- (*usage) (0);
- case 'v':
- printf ("%s (%s) %s\n", command_name, package, version);
- close_stdout (); /* FIXME: output failure exit status
- should be settable via an arg. */
- exit (0);
- default:
- /* Don't process any other long-named options. */
- break;
- }
- }
- /* Restore previous value. */
- opterr = saved_opterr;
- /* Reset this to zero so that getopt internals get initialized from
- the probably-new parameters when/if getopt is called later. */
- optind = 0;
- }
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