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 #ifdef HAVE_CONFIG_H
  20 #include <config.h>
  21 #endif
  22
  23 #ifdef _LIBC
  24 # include <getopt.h>
  25 #else
  26 # include "getopt.h"
  27 #endif
  28 #include "getopt_int.h"
  29
  30 #include <stdio.h>
  31
  32 /* Comment out all this code if we are using the GNU C Library, and are not
  33    actually compiling the library itself.  This code is part of the GNU C
  34    Library, but also included in many other GNU distributions.  Compiling
  35    and linking in this code is a waste when using the GNU C library
  36    (especially if it is a shared library).  Rather than having every GNU
  37    program understand `configure --with-gnu-libc' and omit the object files,
  38    it is simpler to just do this in the source for each such file.  */
  39
  40 #define GETOPT_INTERFACE_VERSION 2
  41 #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
  42 #include <gnu-versions.h>
  43 #if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
  44 #define ELIDE_CODE
  45 #endif
  46 #endif
  47
  48 #ifndef ELIDE_CODE
  49
  50
  51 /* This needs to come after some library #include
  52    to get __GNU_LIBRARY__ defined.  */
  53 #ifdef __GNU_LIBRARY__
  54 #include <stdlib.h>
  55 #endif
  56
  57 #ifndef NULL
  58 #define NULL 0
  59 #endif
  60
  61 int
  62 getopt_long (int argc, char *const *argv, const char *options,
  63              const struct option *long_options, int *opt_index)
  64 {
  65   return _getopt_internal (argc, argv, options, long_options, opt_index, 0, 0);
  66 }
  67
  68 int
  69 _getopt_long_r (int argc, char *const *argv, const char *options,
  70                 const struct option *long_options, int *opt_index,
  71                 struct _getopt_data *d)
  72 {
  73   return _getopt_internal_r (argc, argv, options, long_options, opt_index,
  74                              0, d, 0);
  75 }
  76
  77 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
  78    If an option that starts with '-' (not '--') doesn't match a long option,
  79    but does match a short option, it is parsed as a short option
  80    instead.  */
  81
  82 int
  83 getopt_long_only (int argc, char *const *argv, const char *options,
  84                   const struct option *long_options, int *opt_index)
  85 {
  86   return _getopt_internal (argc, argv, options, long_options, opt_index, 1, 0);
  87 }
  88
  89 int
  90 _getopt_long_only_r (int argc, char *const *argv, const char *options,
  91                      const struct option *long_options, int *opt_index,
  92                      struct _getopt_data *d)
  93 {
  94   return _getopt_internal_r (argc, argv, options, long_options, opt_index,
  95                              1, d, 0);
  96 }
  97
  98 #endif  /* Not ELIDE_CODE.  */
  99 \f
 100 #ifdef TEST
 101
 102 #include <stdio.h>
 103
 104 int
 105 main (int argc, char **argv)
 106 {
 107   int c;
 108   int digit_optind = 0;
 109
 110   while (1)
 111     {
 112       int this_option_optind = optind ? optind : 1;
 113       int option_index = 0;
 114       static struct option long_options[] =
 115       {
 116         {"add", 1, 0, 0},
 117         {"append", 0, 0, 0},
 118         {"delete", 1, 0, 0},
 119         {"verbose", 0, 0, 0},
 120         {"create", 0, 0, 0},
 121         {"file", 1, 0, 0},
 122         {0, 0, 0, 0}
 123       };
 124
 125       c = getopt_long (argc, argv, "abc:d:0123456789",
 126                        long_options, &option_index);
 127       if (c == -1)
 128         break;
 129
 130       switch (c)
 131         {
 132         case 0:
 133           printf ("option %s", long_options[option_index].name);
 134           if (optarg)
 135             printf (" with arg %s", optarg);
 136           printf ("\n");
 137           break;
 138
 139         case '0':
 140         case '1':
 141         case '2':
 142         case '3':
 143         case '4':
 144         case '5':
 145         case '6':
 146         case '7':
 147         case '8':
 148         case '9':
 149           if (digit_optind != 0 && digit_optind != this_option_optind)
 150             printf ("digits occur in two different argv-elements.\n");
 151           digit_optind = this_option_optind;
 152           printf ("option %c\n", c);
 153           break;
 154
 155         case 'a':
 156           printf ("option a\n");
 157           break;
 158
 159         case 'b':
 160           printf ("option b\n");
 161           break;
 162
 163         case 'c':
 164           printf ("option c with value `%s'\n", optarg);
 165           break;
 166
 167         case 'd':
 168           printf ("option d with value `%s'\n", optarg);
 169           break;
 170
 171         case '?':
 172           break;
 173
 174         default:
 175           printf ("?? getopt returned character code 0%o ??\n", c);
 176         }
 177     }
 178
 179   if (optind < argc)
 180     {
 181       printf ("non-option ARGV-elements: ");
 182       while (optind < argc)
 183         printf ("%s ", argv[optind++]);
 184       printf ("\n");
 185     }
 186
 187   exit (0);
 188 }
 189
 190 #endif /* TEST */