include/getopt.h

   1 /*      $NetBSD: getopt.h,v 1.4 2000/07/07 10:43:54 ad Exp $    */
   2 /*      $FreeBSD: src/include/getopt.h,v 1.6 2004/02/24 08:09:20 ache 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 #include <unistd.h>
  45
  46 /*
  47  * GNU-like getopt_long()/getopt_long_only() with 4.4BSD optreset extension.
  48  * getopt() is declared here too for GNU programs.
  49  */
  50 #define no_argument        0
  51 #define required_argument  1
  52 #define optional_argument  2
  53
  54 struct option {
  55         /* name of long option */
  56         const char *name;
  57         /*
  58          * one of no_argument, required_argument, and optional_argument:
  59          * whether option takes an argument
  60          */
  61         int has_arg;
  62         /* if not NULL, set *flag to val when option found */
  63         int *flag;
  64         /* if flag not NULL, value to set *flag to; else return value */
  65         int val;
  66 };
  67
  68 __BEGIN_DECLS
  69 int     getopt_long(int, char * const *, const char *,
  70         const struct option *, int *);
  71 int     getopt_long_only(int, char * const *, const char *,
  72         const struct option *, int *);
  73 #ifndef _GETOPT
  74 #define _GETOPT
  75 int      getopt(int, char * const [], const char *);
  76
  77 extern char *optarg;                    /* getopt(3) external variables */
  78 extern int optind, opterr, optopt;
  79 #endif
  80 #ifndef _OPTRESET
  81 #define _OPTRESET
  82 extern int optreset;                    /* getopt(3) external variable */
  83 #endif
  84 __END_DECLS
  85
  86 #endif /* !_GETOPT_H_ */