source: branches/3.0/mindi-busybox/console-tools/deallocvt.c @ 3085

Last change on this file since 3085 was 2725, checked in by bruno, 8 years ago
  • Update mindi-busybox to 1.18.3 to avoid problems with the tar command which is now failing on recent versions with busybox 1.7.3
File size: 863 bytes
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * Disallocate virtual terminal(s)
4 *
5 * Copyright (C) 2003 by Tito Ragusa <farmatito@tiscali.it>
6 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
7 *
8 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
9 */
10
11/* no options, no getopt */
12
13#include "libbb.h"
14
15/* From <linux/vt.h> */
16enum { VT_DISALLOCATE = 0x5608 }; /* free memory associated to vt */
17
18int deallocvt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
19int deallocvt_main(int argc UNUSED_PARAM, char **argv)
20{
21    /* num = 0 deallocate all unused consoles */
22    int num = 0;
23
24    if (argv[1]) {
25        if (argv[2])
26            bb_show_usage();
27        num = xatou_range(argv[1], 1, 63);
28    }
29
30    /* double cast suppresses "cast to ptr from int of different size" */
31    xioctl(get_console_fd_or_die(), VT_DISALLOCATE, (void *)(ptrdiff_t)num);
32    return EXIT_SUCCESS;
33}
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