libnet  latest
A Portable Framework for Low-Level Network Packet Construction
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 
46 struct 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
61 int getopt_long(int, char * const *, const char *,
62  const struct option *, int *);
63 int getopt_long_only(int, char * const *, const char *,
64  const struct option *, int *);
65 #ifndef _GETOPT_DECLARED
66 #define _GETOPT_DECLARED
67 int getopt(int, char * const [], const char *);
68 
69 extern char *optarg; /* getopt(3) external variables */
70 extern int optind, opterr, optopt;
71 #endif
72 #ifndef _OPTRESET_DECLARED
73 #define _OPTRESET_DECLARED
74 extern int optreset; /* getopt(3) external variable */
75 #endif
76 __END_DECLS
77 
78 #endif /* !_GETOPT_H_ */
Definition: getopt.h:46