test/unistd/getopt.c

   1 /* Getopt tests */
   2
   3 #include <stdio.h>
   4 #include <string.h>
   5 #include <stdlib.h>
   6 #include <getopt.h>
   7
   8
   9 int main (int argc, char **argv)
  10 {
  11   int c;
  12   int digit_optind = 0;
  13
  14   while (1)
  15     {
  16       int this_option_optind = optind ? optind : 1;
  17
  18       c = getopt (argc, argv, "abc:d:0123456789");
  19       if (c == EOF)
  20         break;
  21
  22       switch (c)
  23         {
  24         case '0':
  25         case '1':
  26         case '2':
  27         case '3':
  28         case '4':
  29         case '5':
  30         case '6':
  31         case '7':
  32         case '8':
  33         case '9':
  34           if (digit_optind != 0 && digit_optind != this_option_optind)
  35             printf ("digits occur in two different argv-elements.\n");
  36           digit_optind = this_option_optind;
  37           printf ("option %c\n", c);
  38           break;
  39
  40         case 'a':
  41           printf ("option a\n");
  42           break;
  43
  44         case 'b':
  45           printf ("option b\n");
  46           break;
  47
  48         case 'c':
  49           printf ("option c with value `%s'\n", optarg);
  50           break;
  51
  52         case '?':
  53           break;
  54
  55         default:
  56           printf ("?? getopt returned character code 0%o ??\n", c);
  57         }
  58     }
  59
  60   if (optind < argc)
  61     {
  62       printf ("non-option ARGV-elements: ");
  63       while (optind < argc)
  64         printf ("%s ", argv[optind++]);
  65       printf ("\n");
  66     }
  67   exit (0);
  68 }
  69