LXR busybox/console-tools/fgconsole.c

   1/* vi: set sw=4 ts=4: */
   2/*
   3 * Mini fgconsole implementation for busybox
   4 *
   5 * Copyright (C) 2010 by Grigory Batalov <bga@altlinux.org>
   6 *
   7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
   8 */
   9
  10#include "libbb.h"
  11
  12/* From <linux/vt.h> */
  13struct vt_stat {
  14        unsigned short v_active;        /* active vt */
  15        unsigned short v_signal;        /* signal to send */
  16        unsigned short v_state;         /* vt bitmask */
  17};
  18enum { VT_GETSTATE = 0x5603 }; /* get global vt state info */
  19
  20int fgconsole_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  21int fgconsole_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
  22{
  23        struct vt_stat vtstat;
  24
  25        vtstat.v_active = 0;
  26        xioctl(get_console_fd_or_die(), VT_GETSTATE, &vtstat);
  27        printf("%d\n", vtstat.v_active);
  28
  29        return EXIT_SUCCESS;
  30}
  31