1 /* vi: set sw=4 ts=4: */
3 * Disallocate virtual terminal(s)
5 * Copyright (C) 2003 by Tito Ragusa <farmatito@tiscali.it>
6 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
8 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
11 /* no options, no getopt */
16 #include <sys/types.h>
17 #include <sys/ioctl.h>
20 /* From <linux/vt.h> */
21 enum { VT_DISALLOCATE = 0x5608 }; /* free memory associated to vt */
23 int deallocvt_main(int argc, char *argv[])
25 /* num = 0 deallocate all unused consoles */
30 if ((num = bb_xgetlarg(argv[1], 10, 0, INT_MAX)) == 0) {
31 bb_error_msg_and_die("0: illegal VT number");
40 if (-1 == ioctl(get_console_fd(), VT_DISALLOCATE, num)) {
41 bb_perror_msg_and_die("VT_DISALLOCATE");