1 /* Utility to accept --help and --version options as unobtrusively as possible.
3 Copyright (C) 1993-1994, 1998-2000, 2002-2006, 2009-2011 Free Software
6 This program is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19 /* Written by Jim Meyering. */
24 #include "long-options.h"
31 #include "version-etc.h"
33 static struct option const long_options[] =
35 {"help", no_argument, NULL, 'h'},
36 {"version", no_argument, NULL, 'v'},
40 /* Process long options --help and --version, but only if argc == 2.
41 Be careful not to gobble up `--'. */
44 parse_long_options (int argc,
46 const char *command_name,
49 void (*usage_func) (int),
50 /* const char *author1, ...*/ ...)
55 saved_opterr = opterr;
57 /* Don't print an error message for unrecognized options. */
61 && (c = getopt_long (argc, argv, "+", long_options, NULL)) != -1)
66 (*usage_func) (EXIT_SUCCESS);
71 va_start (authors, usage_func);
72 version_etc_va (stdout, command_name, package, version, authors);
77 /* Don't process any other long-named options. */
82 /* Restore previous value. */
83 opterr = saved_opterr;
85 /* Reset this to zero so that getopt internals get initialized from
86 the probably-new parameters when/if getopt is called later. */