include/getopt.h

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