manual/examples/testopt.c

   1 /*@group*/
   2 #include <unistd.h>
   3 #include <stdio.h>
   4
   5 int
   6 main (int argc, char **argv)
   7 {
   8   int aflag = 0;
   9   int bflag = 0;
  10   char *cvalue = NULL;
  11   int index;
  12   int c;
  13
  14   opterr = 0;
  15 /*@end group*/
  16
  17 /*@group*/
  18   while ((c = getopt (argc, argv, "abc:")) != -1)
  19     switch (c)
  20       {
  21       case 'a':
  22         aflag = 1;
  23         break;
  24       case 'b':
  25         bflag = 1;
  26         break;
  27       case 'c':
  28         cvalue = optarg;
  29         break;
  30       case '?':
  31         if (isprint (optopt))
  32           fprintf (stderr, "Unknown option `-%c'.\n", optopt);
  33         else
  34           fprintf (stderr,
  35                    "Unknown option character `\\x%x'.\n",
  36                    optopt);
  37         return 1;
  38       default:
  39         abort ();
  40       }
  41 /*@end group*/
  42
  43 /*@group*/
  44   printf ("aflag = %d, bflag = %d, cvalue = %s\n",
  45           aflag, bflag, cvalue);
  46
  47   for (index = optind; index < argc; index++)
  48     printf ("Non-option argument %s\n", argv[index]);
  49   return 0;
  50 }
  51 /*@end group*/