/include/getopt.h

 1/*	$NetBSD: getopt.h,v 1.4 2000/07/07 10:43:54 ad Exp $	*/
 2/*	$FreeBSD$ */
 3
 4/*-
 5 * Copyright (c) 2000 The NetBSD Foundation, Inc.
 6 * All rights reserved.
 7 *
 8 * This code is derived from software contributed to The NetBSD Foundation
 9 * by Dieter Baron and Thomas Klausner.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#ifndef _GETOPT_H_
34#define _GETOPT_H_
35
36#include <sys/cdefs.h>
37
38/*
39 * GNU-like getopt_long()/getopt_long_only() with 4.4BSD optreset extension.
40 * getopt() is declared here too for GNU programs.
41 */
42#define no_argument        0
43#define required_argument  1
44#define optional_argument  2
45
46struct option {
47	/* name of long option */
48	const char *name;
49	/*
50	 * one of no_argument, required_argument, and optional_argument:
51	 * whether option takes an argument
52	 */
53	int has_arg;
54	/* if not NULL, set *flag to val when option found */
55	int *flag;
56	/* if flag not NULL, value to set *flag to; else return value */
57	int val;
58};
59
60__BEGIN_DECLS
61int	getopt_long(int, char * const *, const char *,
62	const struct option *, int *);
63int	getopt_long_only(int, char * const *, const char *,
64	const struct option *, int *);
65#ifndef _GETOPT_DECLARED
66#define	_GETOPT_DECLARED
67int	 getopt(int, char * const [], const char *);
68
69extern char *optarg;			/* getopt(3) external variables */
70extern int optind, opterr, optopt;
71#endif
72#ifndef _OPTRESET_DECLARED
73#define	_OPTRESET_DECLARED
74extern int optreset;			/* getopt(3) external variable */
75#endif
76__END_DECLS
77 
78#endif /* !_GETOPT_H_ */