mirror of git://git.suckless.org/ubase
53 lines
901 B
C
53 lines
901 B
C
/* See LICENSE file for copyright and license details. */
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/ioctl.h>
|
|
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "util.h"
|
|
|
|
#define CONSOLE "/dev/console"
|
|
|
|
#define VT_LOCKSWITCH 0x560B /* disallow vt switching */
|
|
#define VT_UNLOCKSWITCH 0x560C /* allow vt switching */
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
eprintf("usage: %s n | y\n", argv0);
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
int fd;
|
|
int allow;
|
|
|
|
ARGBEGIN {
|
|
default:
|
|
usage();
|
|
} ARGEND;
|
|
|
|
if (argc != 1)
|
|
usage();
|
|
|
|
if (!strcmp(argv[0], "y"))
|
|
allow = 1;
|
|
else if (!strcmp(argv[0], "n"))
|
|
allow = 0;
|
|
else
|
|
usage();
|
|
|
|
if ((fd = open(CONSOLE, O_WRONLY)) < 0)
|
|
eprintf("open %s:", CONSOLE);
|
|
if (ioctl(fd, allow ? VT_UNLOCKSWITCH : VT_LOCKSWITCH) < 0)
|
|
eprintf("cannot %s VT switch:",
|
|
allow ? "unlock" : "lock");
|
|
close(fd);
|
|
return 0;
|
|
}
|