posix/tstgetopt.c

   1 #include <ansidecl.h>
   2 #include <unistd.h>
   3 #include <stdio.h>
   4
   5 int main (int argc, char **argv)
   6 {
   7   int aflag = 0;
   8   int bflag = 0;
   9   char *cvalue = NULL;
  10   int index;
  11   int c;
  12
  13   while ((c = getopt (argc, argv, "abc:")) >= 0)
  14     switch (c) {
  15     case 'a':
  16       aflag = 1;
  17       break;
  18     case 'b':
  19       bflag = 1;
  20       break;
  21     case 'c':
  22       cvalue = optarg;
  23       break;
  24     case '?':
  25 #if 0
  26       fprintf (stderr, "Unknown option %c.\n", optopt);
  27 #else
  28       fputs ("Unknown option.\n", stderr);
  29 #endif
  30       return -1;
  31     default:
  32       fprintf (stderr, "This should never happen!\n");
  33       return -1;
  34     }
  35
  36   printf ("aflag = %d, bflag = %d, cvalue = %s\n", aflag, bflag, cvalue);
  37
  38   for (index = optind; index < argc; index++)
  39     printf ("Non-option argument %s\n", argv[index]);
  40   return 0;
  41 }