getopt.h revision 1dc9e472e19acfe6dc7f41e429236e7eef7ceda1 
1/*	$OpenBSD: getopt.h,v 1.1 2002/12/03 20:24:29 millert Exp $	*/
2/*	$NetBSD: getopt.h,v 1.4 2000/07/07 10:43:54 ad Exp $	*/
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 * 3. All advertising materials mentioning features or use of this software
20 *    must display the following acknowledgement:
21 *        This product includes software developed by the NetBSD
22 *        Foundation, Inc. and its contributors.
23 * 4. Neither the name of The NetBSD Foundation nor the names of its
24 *    contributors may be used to endorse or promote products derived
25 *    from this software without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
38 */
39
40#ifndef _GETOPT_H_
41#define _GETOPT_H_
42
43#include <sys/cdefs.h>
44
45/*
46 * GNU-like getopt_long() and 4.4BSD getsubopt()/optreset extensions
47 */
48#define no_argument        0
49#define required_argument  1
50#define optional_argument  2
51
52struct option {
53	/* name of long option */
54	const char *name;
55	/*
56	 * one of no_argument, required_argument, and optional_argument:
57	 * whether option takes an argument
58	 */
59	int has_arg;
60	/* if not NULL, set *flag to val when option found */
61	int *flag;
62	/* if flag not NULL, value to set *flag to; else return value */
63	int val;
64};
65
66__BEGIN_DECLS
67int	 getopt_long(int, char * const *, const char *,
68	    const struct option *, int *);
69int	 getopt_long_only(int, char * const *, const char *,
70	    const struct option *, int *);
71#ifndef _GETOPT_DEFINED_
72#define _GETOPT_DEFINED_
73int	 getopt(int, char * const *, const char *);
74int	 getsubopt(char **, char * const *, char **);
75
76extern   char *optarg;                  /* getopt(3) external variables */
77extern   int opterr;
78extern   int optind;
79extern   int optopt;
80extern   int optreset;
81extern   char *suboptarg;               /* getsubopt(3) external variable */
82#endif
83__END_DECLS
84
85#endif /* !_GETOPT_H_ */
86