source: MondoRescue/branches/2.2.9/mindi-busybox/console-tools/fgconsole.c

/* vi: set sw=4 ts=4: */
/*
 * Mini fgconsole implementation for busybox
 *
 * Copyright (C) 2010 by Grigory Batalov <bga@altlinux.org>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
 */

#include "libbb.h"

/* From <linux/vt.h> */
struct vt_stat {
    unsigned short v_active;        /* active vt */
    unsigned short v_signal;        /* signal to send */
    unsigned short v_state;         /* vt bitmask */
};
enum { VT_GETSTATE = 0x5603 }; /* get global vt state info */

int fgconsole_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int fgconsole_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
{
    struct vt_stat vtstat;

    vtstat.v_active = 0;
    xioctl(get_console_fd_or_die(), VT_GETSTATE, &vtstat);
    printf("%d\n", vtstat.v_active);

    return EXIT_SUCCESS;
}