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#include <fcntl.h>
#include <sys/ioctl.h>
#include <linux/vt.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
main (int argc, char *argv[])
{
int fd;
int i;
char buf[128];
struct vt_mode vm;
for (i = 1; i < 31; ++i) {
sprintf (buf, "/dev/tty%d", i);
fd = open (buf, O_RDWR | O_NOCTTY);
memset (&vm, 0, sizeof (vm));
vm.mode = VT_PROCESS;
ioctl (fd, VT_SETMODE, &vm);
ioctl (fd, VT_RELDISP, 0);
ioctl (fd, VT_RELDISP, 1);
ioctl (fd, VT_RELDISP, VT_ACKACQ);
memset (&vm, 0, sizeof (vm));
vm.mode = VT_AUTO;
ioctl (fd, VT_SETMODE, &vm);
ioctl (fd, VT_UNLOCKSWITCH, 0);
close (fd);
}
exit (0);
}
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