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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  #ifdef __cplusplus
44  extern "C" {
45  #endif
46  
47  struct option {
48  	/* name of long option */
49  	const char *name;
50  	/*
51  	 * one of no_argument, required_argument, and optional_argument:
52  	 * whether option takes an argument
53  	 */
54  	int has_arg;
55  	/* if not NULL, set *flag to val when option found */
56  	int *flag;
57  	/* if flag not NULL, value to set *flag to; else return value */
58  	int val;
59  };
60  
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_DEFINED_
66  #define _GETOPT_DEFINED_
67  int	 getopt(int, char * const *, const char *);
68  int	 getsubopt(char **, char * const *, char **);
69  
70  extern   char *optarg;                  /* getopt(3) external variables */
71  extern   int opterr;
72  extern   int optind;
73  extern   int optopt;
74  extern   int optreset;
75  extern   char *suboptarg;               /* getsubopt(3) external variable */
76  #endif
77  
78  #ifdef __cplusplus
79  }
80  #endif
81  
82  #endif /* !_GETOPT_H_ */
83