posix/getopt1.c

   1 /* getopt_long and getopt_long_only entry points for GNU getopt.
   2    Copyright (C) 1987-2017 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library 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 GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18 \f
  19 #ifndef _LIBC
  20 #include "config.h"
  21 #endif
  22
  23 #include "getopt.h"
  24 #include "getopt_int.h"
  25
  26 int
  27 getopt_long (int argc, char *const *argv, const char *options,
  28              const struct option *long_options, int *opt_index)
  29 {
  30   return _getopt_internal (argc, argv, options, long_options, opt_index, 0, 0);
  31 }
  32
  33 int
  34 _getopt_long_r (int argc, char *const *argv, const char *options,
  35                 const struct option *long_options, int *opt_index,
  36                 struct _getopt_data *d)
  37 {
  38   return _getopt_internal_r (argc, argv, options, long_options, opt_index,
  39                              0, d, 0);
  40 }
  41
  42 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
  43    If an option that starts with '-' (not '--') doesn't match a long option,
  44    but does match a short option, it is parsed as a short option
  45    instead.  */
  46
  47 int
  48 getopt_long_only (int argc, char *const *argv, const char *options,
  49                   const struct option *long_options, int *opt_index)
  50 {
  51   return _getopt_internal (argc, argv, options, long_options, opt_index, 1, 0);
  52 }
  53
  54 int
  55 _getopt_long_only_r (int argc, char *const *argv, const char *options,
  56                      const struct option *long_options, int *opt_index,
  57                      struct _getopt_data *d)
  58 {
  59   return _getopt_internal_r (argc, argv, options, long_options, opt_index,
  60                              1, d, 0);
  61 }
  62
  63 \f
  64 #ifdef TEST
  65
  66 #include <stdio.h>
  67 #include <stdlib.h>
  68
  69 int
  70 main (int argc, char **argv)
  71 {
  72   int c;
  73   int digit_optind = 0;
  74
  75   while (1)
  76     {
  77       int this_option_optind = optind ? optind : 1;
  78       int option_index = 0;
  79       static struct option long_options[] =
  80       {
  81         {"add", 1, 0, 0},
  82         {"append", 0, 0, 0},
  83         {"delete", 1, 0, 0},
  84         {"verbose", 0, 0, 0},
  85         {"create", 0, 0, 0},
  86         {"file", 1, 0, 0},
  87         {0, 0, 0, 0}
  88       };
  89
  90       c = getopt_long (argc, argv, "abc:d:0123456789",
  91                        long_options, &option_index);
  92       if (c == -1)
  93         break;
  94
  95       switch (c)
  96         {
  97         case 0:
  98           printf ("option %s", long_options[option_index].name);
  99           if (optarg)
 100             printf (" with arg %s", optarg);
 101           printf ("\n");
 102           break;
 103
 104         case '0':
 105         case '1':
 106         case '2':
 107         case '3':
 108         case '4':
 109         case '5':
 110         case '6':
 111         case '7':
 112         case '8':
 113         case '9':
 114           if (digit_optind != 0 && digit_optind != this_option_optind)
 115             printf ("digits occur in two different argv-elements.\n");
 116           digit_optind = this_option_optind;
 117           printf ("option %c\n", c);
 118           break;
 119
 120         case 'a':
 121           printf ("option a\n");
 122           break;
 123
 124         case 'b':
 125           printf ("option b\n");
 126           break;
 127
 128         case 'c':
 129           printf ("option c with value '%s'\n", optarg);
 130           break;
 131
 132         case 'd':
 133           printf ("option d with value '%s'\n", optarg);
 134           break;
 135
 136         case '?':
 137           break;
 138
 139         default:
 140           printf ("?? getopt returned character code 0%o ??\n", c);
 141         }
 142     }
 143
 144   if (optind < argc)
 145     {
 146       printf ("non-option ARGV-elements: ");
 147       while (optind < argc)
 148         printf ("%s ", argv[optind++]);
 149       printf ("\n");
 150     }
 151
 152   exit (0);
 153 }
 154
 155 #endif /* TEST */