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/* See LICENSE file for copyright and license details. */
#include <linux/vt.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define VT(OP, ARG) vt(OP, ARG, #OP)
static char *argv0;
static void
vt(int op, void *arg, const char *opstr)
{
if (ioctl(STDIN_FILENO, op, arg) == -1) {
fprintf(stderr, "%s: ioctl <stdin> %s: %s\n", argv0, opstr, strerror(errno));
exit(1);
}
}
int
main(int argc, char *argv[])
{
struct vt_event e;
struct vt_stat s;
argv0 = *argv++, argc--;
if (argc != (*argv && !strcmp(*argv, "--"))) {
fprintf(stderr, "usage: %s\n", argv0);
exit(1);
}
VT(VT_GETSTATE, &s);
printf("%u\n", s.v_active);
e.event = VT_EVENT_SWITCH;
for (;;) {
VT(VT_WAITEVENT, &e);
printf("%u\n", e.newev);
}
return 0;
}
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