usr.bin/getopt/getopt.c

   1 #include <sys/cdefs.h>
   2 __FBSDID("$FreeBSD$");
   3
   4 /*
   5  * This material, written by Henry Spencer, was released by him
   6  * into the public domain and is thus not subject to any copyright.
   7  */
   8
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <unistd.h>
  12
  13 int
  14 main(int argc, char *argv[])
  15 {
  16         int c;
  17         int status = 0;
  18
  19         optind = 2;     /* Past the program name and the option letters. */
  20         while ((c = getopt(argc, argv, argv[1])) != -1)
  21                 switch (c) {
  22                 case '?':
  23                         status = 1;     /* getopt routine gave message */
  24                         break;
  25                 default:
  26                         if (optarg != NULL)
  27                                 printf(" -%c %s", c, optarg);
  28                         else
  29                                 printf(" -%c", c);
  30                         break;
  31                 }
  32         printf(" --");
  33         for (; optind < argc; optind++)
  34                 printf(" %s", argv[optind]);
  35         printf("\n");
  36         return status;
  37 }