usr/src/lib/libast/common/comp/getopt.c

   1 /***********************************************************************
   2 *                                                                      *
   3 *               This software is part of the ast package               *
   4 *          Copyright (c) 1985-2010 AT&T Intellectual Property          *
   5 *                      and is licensed under the                       *
   6 *                  Common Public License, Version 1.0                  *
   7 *                    by AT&T Intellectual Property                     *
   8 *                                                                      *
   9 *                A copy of the License is available at                 *
  10 *            http://www.opensource.org/licenses/cpl1.0.txt             *
  11 *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
  12 *                                                                      *
  13 *              Information and Software Systems Research               *
  14 *                            AT&T Research                             *
  15 *                           Florham Park NJ                            *
  16 *                                                                      *
  17 *                 Glenn Fowler <gsf@research.att.com>                  *
  18 *                  David Korn <dgk@research.att.com>                   *
  19 *                   Phong Vo <kpv@research.att.com>                    *
  20 *                                                                      *
  21 ***********************************************************************/
  22 #pragma prototyped
  23
  24 #include <ast.h>
  25
  26 #undef  _lib_getopt     /* we can satisfy the api */
  27
  28 #if _lib_getopt
  29
  30 NoN(getopt)
  31
  32 #else
  33
  34 #undef  _BLD_ast        /* enable ast imports since we're user static */
  35
  36 #include <error.h>
  37 #include <option.h>
  38
  39 int             opterr = 1;
  40 int             optind = 1;
  41 int             optopt = 0;
  42 char*           optarg = 0;
  43
  44 static int      lastoptind;
  45
  46 extern int
  47 getopt(int argc, char* const* argv, const char* optstring)
  48 {
  49         int     n;
  50
  51         NoP(argc);
  52         opt_info.index = (optind > 1 || optind == lastoptind) ? optind : 0;
  53         if (opt_info.index >= argc)
  54                 return -1;
  55         switch (n = optget((char**)argv, optstring))
  56         {
  57         case ':':
  58                 n = '?';
  59                 /*FALLTHROUGH*/
  60         case '?':
  61                 if (opterr && (!optstring || *optstring != ':'))
  62                 {
  63                         if (!error_info.id)
  64                                 error_info.id = argv[0];
  65                         errormsg(NiL, 2, opt_info.arg);
  66                 }
  67                 optopt = opt_info.option[1];
  68                 break;
  69         case 0:
  70                 n = -1;
  71                 break;
  72         }
  73         optarg = opt_info.arg;
  74         lastoptind = optind = opt_info.index;
  75         return n;
  76 }
  77
  78 #endif