* Disallocate virtual terminal(s)
*
* Copyright (C) 2003 by Tito Ragusa <farmatito@tiscali.it>
- * Copyright (C) 1999-2003 by Erik Andersen <andersen@codepoet.org>
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
/* no options, no getopt */
-#include <stdlib.h>
-#include <stdio.h>
-#include <fcntl.h>
-#include <sys/types.h>
-#include <sys/ioctl.h>
-#include "busybox.h"
+#include "libbb.h"
/* From <linux/vt.h> */
-static const int VT_DISALLOCATE = 0x5608; /* free memory associated to vt */
+enum { VT_DISALLOCATE = 0x5608 }; /* free memory associated to vt */
-int deallocvt_main(int argc, char *argv[])
+int deallocvt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int deallocvt_main(int argc ATTRIBUTE_UNUSED, char **argv)
{
/* num = 0 deallocate all unused consoles */
int num = 0;
- switch(argc)
- {
- case 2:
- if((num = bb_xgetlarg(argv[1], 10, 0, INT_MAX)) == 0)
- bb_error_msg_and_die("0: illegal VT number");
- /* Falltrough */
- case 1:
- break;
- default:
+ if (argv[1]) {
+ if (argv[2])
bb_show_usage();
+ num = xatou_range(argv[1], 1, 63);
}
- if (ioctl( get_console_fd(), VT_DISALLOCATE, num )) {
- bb_perror_msg_and_die("VT_DISALLOCATE");
- }
+ /* double cast suppresses "cast to ptr from int of different size" */
+ xioctl(get_console_fd(), VT_DISALLOCATE, (void *)(ptrdiff_t)num);
return EXIT_SUCCESS;
}