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
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
/* Please use this file as a template when introducing new command to
* util-linux package.
* -- remove above */
/*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* 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 of the License, or
* (at your option) any later version.
*
* Copyright (c) 20nn Example Commercial, Inc
* Written by Your Name <you@example.com>
*
* fixme-command-name - purpose of it
*/
#include <getopt.h>
#include <stdio.h>
#include <unistd.h>
#include "c.h"
#include "closestream.h"
#include "nls.h"
/*
* FIXME: remove this comment.
* Other usage() constants that are not demonstrated below:
* USAGE_FUNCTIONS USAGE_COMMANDS USAGE_COLUMNS
*/
static void __attribute__((__noreturn__)) usage(void)
{
fputs(USAGE_HEADER, stdout);
fprintf(stdout, _(" %s [options] file...\n"), program_invocation_short_name);
fputs(USAGE_SEPARATOR, stdout);
fputsln(_("Short program description."), stdout);
fputs(USAGE_OPTIONS, stdout);
fputsln(_(" -n, --no-argument option does not use argument"), stdout);
fputsln(_(" --optional[=<arg>] option argument is optional"), stdout);
fputsln(_(" -r, --required <arg> option requires an argument"), stdout);
fputsln(_(" -z no long option"), stdout);
fputsln(_(" --xyzzy a long option only"), stdout);
fputsln(_(" -e, --extremely-long-long-option\n"
" use next line for description when needed"), stdout);
fputsln(_(" -l, --long-explanation an example of very verbose, and chatty option\n"
" description on two, or multiple lines, where the\n"
" consecutive lines are intended by two spaces"), stdout);
fputsln(_(" -f, --foobar next option description resets indent"), stdout);
fputs(USAGE_SEPARATOR, stdout);
fprintf(stdout, USAGE_HELP_OPTIONS(25)); /* char offset to align option descriptions */
fprintf(stdout, USAGE_MAN_TAIL("fixme-command-name(1)"));
exit(EXIT_SUCCESS);
}
int main(int argc, char **argv)
{
int c;
enum {
OPT_XYZZY = CHAR_MAX + 1,
OPT_OPTIONAL /* see howto-man-page.txt about short option */
};
static const struct option longopts[] = {
{ "no-argument", no_argument, NULL, 'n' },
{ "optional", optional_argument, NULL, OPT_OPTIONAL },
{ "required", required_argument, NULL, 'r' },
{ "extremely-long-long-option", no_argument, NULL, 'e' },
{ "xyzzy", no_argument, NULL, OPT_XYZZY },
{ "long-explanation", no_argument, NULL, 'l' },
{ "foobar", no_argument, NULL, 'f' },
{ "version", no_argument, NULL, 'V' },
{ "help", no_argument, NULL, 'h' },
{ NULL, 0, NULL, 0 }
};
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
close_stdout_atexit();
while ((c = getopt_long(argc, argv, "nr:zelfVh", longopts, NULL)) != -1)
switch (c) {
case 'n':
case OPT_OPTIONAL:
case 'r':
case 'z':
case OPT_XYZZY:
case 'e':
case 'l':
case 'f':
break;
case 'V':
print_version(EXIT_SUCCESS);
case 'h':
usage();
default:
errtryhelp(EXIT_FAILURE);
}
return EXIT_SUCCESS;
}
|
