1 /* $NetBSD: doioctl.c,v 1.2 2021/07/06 09:30:07 jmcneill Exp $ */ 2 3 #include <sys/types.h> 4 #include <sys/ioctl.h> 5 6 #include <err.h> 7 #include <fcntl.h> 8 #include <stdio.h> 9 #include <stdlib.h> 10 11 #include "common.h" 12 13 int 14 main(int argc, char *argv[]) 15 { 16 int fd, i; 17 18 if (argc != 3 && argc != 4) 19 errx(1, "args"); 20 21 fd = open(argv[1], O_RDWR); 22 if (fd == -1) 23 err(1, "open"); 24 25 i = atoi(argv[2]); 26 27 if (argc == 3) 28 if (ioctl(fd, INTROTOGGLE, &i) == -1) 29 err(1, "ioctl"); 30 else 31 if (ioctl(fd, INTROTOGGLE_R, &i) == -1) 32 err(1, "ioctl"); 33 34 printf("i is now %d\n", i); 35 } 36