blob: 117224560fceed19e0b71650ca2dd287110ae771 [file] [log] [blame]
Erik Andersene49d5ec2000-02-08 19:58:47 +00001/* vi: set sw=4 ts=4: */
Eric Andersen0460ff21999-10-25 23:32:44 +00002/*
Eric Andersen7f6295f2003-10-22 10:34:15 +00003 * Disallocate virtual terminal(s)
4 *
5 * Copyright (C) 2003 by Tito Ragusa <farmatito@tiscali.it>
Eric Andersenc7bda1c2004-03-15 08:29:22 +00006 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
Eric Andersen7f6295f2003-10-22 10:34:15 +00007 *
"Robert P. J. Day"801ab142006-07-12 07:56:04 +00008 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
Eric Andersen0460ff21999-10-25 23:32:44 +00009 */
Eric Andersen7f6295f2003-10-22 10:34:15 +000010
11/* no options, no getopt */
12
Denis Vlasenkob6adbf12007-05-26 19:00:18 +000013#include "libbb.h"
Eric Andersenbd22ed82000-07-08 18:55:24 +000014
15/* From <linux/vt.h> */
Rob Landleybc68cd12006-03-10 19:22:06 +000016enum { VT_DISALLOCATE = 0x5608 }; /* free memory associated to vt */
Eric Andersenbd22ed82000-07-08 18:55:24 +000017
Denis Vlasenko9b49a5e2007-10-11 10:05:36 +000018int deallocvt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
Bernhard Reutner-Fischerfebe3c42007-04-04 20:52:03 +000019int deallocvt_main(int argc, char **argv)
Erik Andersene49d5ec2000-02-08 19:58:47 +000020{
Glenn L McGrath17b4a202004-01-15 11:50:19 +000021 /* num = 0 deallocate all unused consoles */
22 int num = 0;
Eric Andersen0460ff21999-10-25 23:32:44 +000023
Rob Landleyead19302006-03-10 23:16:25 +000024 switch (argc) {
Denis Vlasenko13858992006-10-08 12:49:22 +000025 case 2:
Denis Vlasenko6ee023c2007-08-23 10:52:52 +000026 num = xatou_range(argv[1], 1, 63);
Rob Landley9f0e00f2005-09-08 03:27:06 +000027 /* Fallthrough */
Denis Vlasenko13858992006-10-08 12:49:22 +000028 case 1:
29 break;
30 default:
31 bb_show_usage();
Mark Whitley6f6aa9b2000-12-13 23:23:30 +000032 }
Glenn L McGrath17b4a202004-01-15 11:50:19 +000033
Denis Vlasenko968dbf92007-10-29 19:52:21 +000034 /* double cast suppresses "cast to ptr from int of different size" */
Denis Vlasenko6ee023c2007-08-23 10:52:52 +000035 xioctl(get_console_fd(), VT_DISALLOCATE, (void *)(ptrdiff_t)num);
Glenn L McGrath17b4a202004-01-15 11:50:19 +000036 return EXIT_SUCCESS;
Eric Andersen0460ff21999-10-25 23:32:44 +000037}