posix/tstgetopt.c

   1 #include <getopt.h>
   2 #include <stdio.h>
   3 #include <string.h>
   4 #include <unistd.h>
   5
   6 int
   7 main (int argc, char **argv)
   8 {
   9   static const struct option options[] =
  10     {
  11       {"required", required_argument, NULL, 'r'},
  12       {"optional", optional_argument, NULL, 'o'},
  13       {"none",     no_argument,       NULL, 'n'},
  14       {"color",    no_argument,       NULL, 'C'},
  15       {"colour",   no_argument,       NULL, 'C'},
  16       {NULL,       0,                 NULL, 0 }
  17     };
  18
  19   int aflag = 0;
  20   int bflag = 0;
  21   char *cvalue = NULL;
  22   int Cflag = 0;
  23   int nflag = 0;
  24   int index;
  25   int c;
  26   int result = 0;
  27
  28   while ((c = getopt_long (argc, argv, "abc:", options, NULL)) >= 0)
  29     switch (c)
  30       {
  31       case 'a':
  32         aflag = 1;
  33         break;
  34       case 'b':
  35         bflag = 1;
  36         break;
  37       case 'c':
  38         cvalue = optarg;
  39         break;
  40       case 'C':
  41         ++Cflag;
  42         break;
  43       case '?':
  44         fputs ("Unknown option.\n", stderr);
  45         return 1;
  46       default:
  47         fprintf (stderr, "This should never happen!\n");
  48         return 1;
  49
  50       case 'r':
  51         printf ("--required %s\n", optarg);
  52         result |= strcmp (optarg, "foobar") != 0;
  53         break;
  54       case 'o':
  55         printf ("--optional %s\n", optarg);
  56         result |= optarg == NULL || strcmp (optarg, "bazbug") != 0;
  57         break;
  58       case 'n':
  59         puts ("--none");
  60         nflag = 1;
  61         break;
  62       }
  63
  64   printf ("aflag = %d, bflag = %d, cvalue = %s, Cflags = %d, nflag = %d\n",
  65           aflag, bflag, cvalue, Cflag, nflag);
  66
  67   result |= (aflag != 1 || bflag != 1 || cvalue == NULL
  68              || strcmp (cvalue, "foobar") != 0 || Cflag != 3 || nflag != 1);
  69
  70   for (index = optind; index < argc; index++)
  71     printf ("Non-option argument %s\n", argv[index]);
  72
  73   result |= optind + 1 != argc || strcmp (argv[optind], "random") != 0;
  74
  75   return result;
  76 }