80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
/* Utility to accept --help and --version options as unobtrusively as possible.
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Copyright (C) 1993, 1994 Free Software Foundation, Inc.
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This program 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 2, or (at your option)
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any later version.
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This program 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 this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* Jim Meyering (meyering@comco.com) */
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#ifdef 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 <getopt.h>
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#include "long-options.h"
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static struct option const long_options[] =
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{
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{"help", no_argument, 0, 'h'},
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{"version", no_argument, 0, 'v'},
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{0, 0, 0, 0}
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};
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/* Process long options --help and --version, but only if argc == 2.
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Be careful not to gobble up `--'. */
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void
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parse_long_options (argc, argv, command_name, version_string, usage)
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int argc;
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char **argv;
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const char *command_name;
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const char *version_string;
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void (*usage)();
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{
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int c;
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int saved_opterr;
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int saved_optind;
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saved_opterr = opterr;
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saved_optind = optind;
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/* Don't print an error message for unrecognized options. */
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opterr = 0;
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if (argc == 2
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&& (c = getopt_long (argc, argv, "+", long_options, (int *) 0)) != EOF)
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{
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switch (c)
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{
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case 'h':
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(*usage) (0);
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case 'v':
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printf ("%s - %s\n", command_name, version_string);
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exit (0);
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default:
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/* Don't process any other long-named options. */
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break;
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}
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}
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/* Restore previous value. */
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opterr = saved_opterr;
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/* Restore optind in case it has advanced past a leading `--'. */
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optind = saved_optind;
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}
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