contrib/cpio/getopt1.c

   1 /* getopt_long and getopt_long_only entry points for GNU getopt.
   2    Copyright (C) 1987, 88, 89, 90, 91, 92, 1993, 1994
   3         Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify it
   6    under the terms of the GNU General Public License as published by the
   7    Free Software Foundation; either version 2, or (at your option) any
   8    later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software
  17    Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  18 \f
  19 #ifdef HAVE_CONFIG_H
  20 #include <config.h>
  21 #endif
  22
  23 #include "getopt.h"
  24
  25 #if !defined (__STDC__) || !__STDC__
  26 /* This is a separate conditional since some stdc systems
  27    reject `defined (const)'.  */
  28 #ifndef const
  29 #define const
  30 #endif
  31 #endif
  32
  33 #include <stdio.h>
  34
  35 /* Comment out all this code if we are using the GNU C Library, and are not
  36    actually compiling the library itself.  This code is part of the GNU C
  37    Library, but also included in many other GNU distributions.  Compiling
  38    and linking in this code is a waste when using the GNU C library
  39    (especially if it is a shared library).  Rather than having every GNU
  40    program understand `configure --with-gnu-libc' and omit the object files,
  41    it is simpler to just do this in the source for each such file.  */
  42
  43 #if defined (_LIBC) || !defined (__GNU_LIBRARY__)
  44
  45
  46 /* This needs to come after some library #include
  47    to get __GNU_LIBRARY__ defined.  */
  48 #ifdef __GNU_LIBRARY__
  49 #include <stdlib.h>
  50 #else
  51 char *getenv ();
  52 #endif
  53
  54 #ifndef NULL
  55 #define NULL 0
  56 #endif
  57
  58 int
  59 getopt_long (argc, argv, options, long_options, opt_index)
  60      int argc;
  61      char *const *argv;
  62      const char *options;
  63      const struct option *long_options;
  64      int *opt_index;
  65 {
  66   return _getopt_internal (argc, argv, options, long_options, opt_index, 0);
  67 }
  68
  69 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
  70    If an option that starts with '-' (not '--') doesn't match a long option,
  71    but does match a short option, it is parsed as a short option
  72    instead.  */
  73
  74 int
  75 getopt_long_only (argc, argv, options, long_options, opt_index)
  76      int argc;
  77      char *const *argv;
  78      const char *options;
  79      const struct option *long_options;
  80      int *opt_index;
  81 {
  82   return _getopt_internal (argc, argv, options, long_options, opt_index, 1);
  83 }
  84
  85
  86 #endif  /* _LIBC or not __GNU_LIBRARY__.  */
  87 \f
  88 #ifdef TEST
  89
  90 #include <stdio.h>
  91
  92 int
  93 main (argc, argv)
  94      int argc;
  95      char **argv;
  96 {
  97   int c;
  98   int digit_optind = 0;
  99
 100   while (1)
 101     {
 102       int this_option_optind = optind ? optind : 1;
 103       int option_index = 0;
 104       static struct option long_options[] =
 105       {
 106         {"add", 1, 0, 0},
 107         {"append", 0, 0, 0},
 108         {"delete", 1, 0, 0},
 109         {"verbose", 0, 0, 0},
 110         {"create", 0, 0, 0},
 111         {"file", 1, 0, 0},
 112         {0, 0, 0, 0}
 113       };
 114
 115       c = getopt_long (argc, argv, "abc:d:0123456789",
 116                        long_options, &option_index);
 117       if (c == EOF)
 118         break;
 119
 120       switch (c)
 121         {
 122         case 0:
 123           printf ("option %s", long_options[option_index].name);
 124           if (optarg)
 125             printf (" with arg %s", optarg);
 126           printf ("\n");
 127           break;
 128
 129         case '0':
 130         case '1':
 131         case '2':
 132         case '3':
 133         case '4':
 134         case '5':
 135         case '6':
 136         case '7':
 137         case '8':
 138         case '9':
 139           if (digit_optind != 0 && digit_optind != this_option_optind)
 140             printf ("digits occur in two different argv-elements.\n");
 141           digit_optind = this_option_optind;
 142           printf ("option %c\n", c);
 143           break;
 144
 145         case 'a':
 146           printf ("option a\n");
 147           break;
 148
 149         case 'b':
 150           printf ("option b\n");
 151           break;
 152
 153         case 'c':
 154           printf ("option c with value `%s'\n", optarg);
 155           break;
 156
 157         case 'd':
 158           printf ("option d with value `%s'\n", optarg);
 159           break;
 160
 161         case '?':
 162           break;
 163
 164         default:
 165           printf ("?? getopt returned character code 0%o ??\n", c);
 166         }
 167     }
 168
 169   if (optind < argc)
 170     {
 171       printf ("non-option ARGV-elements: ");
 172       while (optind < argc)
 173         printf ("%s ", argv[optind++]);
 174       printf ("\n");
 175     }
 176
 177   exit (0);
 178 }
 179
 180 #endif /* TEST */