include/getopt.h

   1 /*      $NetBSD: getopt.h,v 1.10 2007/11/08 20:29:35 christos Exp $     */
   2
   3 /*-
   4  * Copyright (c) 2000 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Dieter Baron and Thomas Klausner.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #ifndef _GETOPT_H_
  33 #define _GETOPT_H_
  34
  35 #include <sys/cdefs.h>
  36 #include <unistd.h>
  37
  38 /*
  39  * Gnu like getopt_long() and BSD4.4 getsubopt()/optreset extensions
  40  */
  41 #define no_argument        0
  42 #define required_argument  1
  43 #define optional_argument  2
  44
  45 struct option {
  46         /* name of long option */
  47         const char *name;
  48         /*
  49          * one of no_argument, required_argument, and optional_argument:
  50          * whether option takes an argument
  51          */
  52         int has_arg;
  53         /* if not NULL, set *flag to val when option found */
  54         int *flag;
  55         /* if flag not NULL, value to set *flag to; else return value */
  56         int val;
  57 };
  58
  59 __BEGIN_DECLS
  60 int getopt_long(int, char * const *, const char *,
  61     const struct option *, int *);
  62 __END_DECLS
  63
  64 #endif /* !_GETOPT_H_ */