share/examples/pud/intro/doioctl.c

   1 /*      $NetBSD$        */
   2
   3 #include <sys/types.h>
   4 #include <sys/ioctl.h>
   5
   6 #include <fcntl.h>
   7 #include <stdio.h>
   8
   9 #include "common.h"
  10
  11 int
  12 main(int argc, char *argv[])
  13 {
  14         int fd, i;
  15
  16         if (argc != 3 && argc != 4)
  17                 errx(1, "args");
  18
  19         fd = open(argv[1], O_RDWR);
  20         if (fd == -1)
  21                 err(1, "open");
  22
  23         i = atoi(argv[2]);
  24
  25         if (argc == 3)
  26                 if (ioctl(fd, INTROTOGGLE, &i) == -1)
  27                         err(1, "ioctl");
  28         else
  29                 if (ioctl(fd, INTROTOGGLE_R, &i) == -1)
  30                         err(1, "ioctl");
  31
  32         printf("i is now %d\n", i);
  33 }