include/getopt.h

   1 /*      $NetBSD: getopt.h,v 1.9 2007/11/07 09:03:58 dogcow 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  * 3. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *        This product includes software developed by the NetBSD
  21  *        Foundation, Inc. and its contributors.
  22  * 4. Neither the name of The NetBSD Foundation nor the names of its
  23  *    contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  36  * POSSIBILITY OF SUCH DAMAGE.
  37  */
  38
  39 #ifndef _GETOPT_H_
  40 #define _GETOPT_H_
  41
  42 #include <sys/cdefs.h>
  43 #include <unistd.h>
  44
  45 /*
  46  * Gnu like getopt_long() and BSD4.4 getsubopt()/optreset extensions
  47  */
  48 #define no_argument        0
  49 #define required_argument  1
  50 #define optional_argument  2
  51
  52 struct option {
  53         /* name of long option */
  54         const char *name;
  55         /*
  56          * one of no_argument, required_argument, and optional_argument:
  57          * whether option takes an argument
  58          */
  59         int has_arg;
  60         /* if not NULL, set *flag to val when option found */
  61         int *flag;
  62         /* if flag not NULL, value to set *flag to; else return value */
  63         int val;
  64 };
  65
  66 __BEGIN_DECLS
  67 int getopt_long(int, char * const *, const char *,
  68     const struct option *, int *);
  69 __END_DECLS
  70
  71 #endif /* !_GETOPT_H_ */