1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/* Utility to accept --help and --version options as unobtrusively as possible.
Copyright (C) 1993, 1994 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Jim Meyering (meyering@comco.com) */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <getopt.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, version_string, usage)
int argc;
char **argv;
const char *command_name;
const char *version_string;
void (*usage)();
{
int c;
int saved_opterr;
int saved_optind;
saved_opterr = opterr;
saved_optind = optind;
/* Don't print an error message for unrecognized options. */
opterr = 0;
if (argc == 2
&& (c = getopt_long (argc, argv, "+", long_options, (int *) 0)) != EOF)
{
switch (c)
{
case 'h':
(*usage) (0);
case 'v':
printf ("%s - %s\n", command_name, version_string);
exit (0);
default:
/* Don't process any other long-named options. */
break;
}
}
/* Restore previous value. */
opterr = saved_opterr;
/* Restore optind in case it has advanced past a leading `--'. */
optind = saved_optind;
}
|
