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/* Getopt tests */

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#include <getopt.h>

int main (int argc, char **argv)

{

  int c;

  int digit_optind = 0;

  while (1)

    {

      int this_option_optind = optind ? optind : 1;

      c = getopt (argc, argv, "abc:d:0123456789");

      if (c == EOF)

        break;

      switch (c)

        {

        case '0':

        case '1':

        case '2':

        case '3':

        case '4':

        case '5':

        case '6':

        case '7':

        case '8':

        case '9':

          if (digit_optind != 0 && digit_optind != this_option_optind)

            printf ("digits occur in two different argv-elements.\n");

          digit_optind = this_option_optind;

          printf ("option %c\n", c);

          break;

        case 'a':

          printf ("option a\n");

          break;

        case 'b':

          printf ("option b\n");

          break;

        case 'c':

          printf ("option c with value `%s'\n", optarg);

          break;

        case '?':

          break;

        default:

          printf ("?? getopt returned character code 0%o ??\n", c);

        }

    }

  if (optind < argc)

    {

      printf ("non-option ARGV-elements: ");

      while (optind < argc)

        printf ("%s ", argv[optind++]);

      printf ("\n");

    }

  exit (0);

}