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 source tree.
11 /* no options, no getopt */
13 //usage:#define deallocvt_trivial_usage
15 //usage:#define deallocvt_full_usage "\n\n"
16 //usage: "Deallocate unused virtual terminal /dev/ttyN"
20 /* From <linux/vt.h> */
21 enum { VT_DISALLOCATE
= 0x5608 }; /* free memory associated to vt */
23 int deallocvt_main(int argc
, char **argv
) MAIN_EXTERNALLY_VISIBLE
;
24 int deallocvt_main(int argc UNUSED_PARAM
, char **argv
)
26 /* num = 0 deallocate all unused consoles */
32 num
= xatou_range(argv
[1], 1, 63);
35 /* double cast suppresses "cast to ptr from int of different size" */
36 xioctl(get_console_fd_or_die(), VT_DISALLOCATE
, (void *)(ptrdiff_t)num
);