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getopt.h
1 /* $OpenBSD: getopt.h,v 1.2 2008/06/26 05:42:04 ray 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  *
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 /*
37  * GNU-like getopt_long() and 4.4BSD getsubopt()/optreset extensions
38  */
39 #define no_argument 0
40 #define required_argument 1
41 #define optional_argument 2
42 
43 struct option {
44  /* name of long option */
45  const char *name;
46  /*
47  * one of no_argument, required_argument, and optional_argument:
48  * whether option takes an argument
49  */
50  int has_arg;
51  /* if not NULL, set *flag to val when option found */
52  int *flag;
53  /* if flag not NULL, value to set *flag to; else return value */
54  int val;
55 };
56 
57 int getopt_long(int, char * const *, const char *,
58  const struct option *, int *);
59 int getopt_long_only(int, char * const *, const char *,
60  const struct option *, int *);
61 #ifndef _GETOPT_DEFINED_
62 #define _GETOPT_DEFINED_
63 int getopt(int, char * const *, const char *);
64 int getsubopt(char **, char * const *, char **);
65 
66 extern char *optarg; /* getopt(3) external variables */
67 extern int opterr;
68 extern int optind;
69 extern int optopt;
70 extern int optreset;
71 extern char *suboptarg; /* getsubopt(3) external variable */
72 #endif
73 
74 #endif /* !_GETOPT_H_ */