trim extra newlines in help texts

[oweals/busybox.git] / console-tools / deallocvt.c

diff --git a/console-tools/deallocvt.c b/console-tools/deallocvt.c
index 08a9d2122e17670d1b67b40d3d741659cd06c74b..b131c0a64985e61adc42948b0a65d527b8655f0c 100644 (file)
--- a/console-tools/deallocvt.c
+++ b/console-tools/deallocvt.c
@@ -5,52 +5,34 @@
  * Copyright (C) 2003 by Tito Ragusa <farmatito@tiscali.it>
  * 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 source tree.
  */
 
 /* no options, no getopt */
 
-#include <stdlib.h>
-#include <stdio.h>
-#include <fcntl.h>
-#include <sys/types.h>
-#include <sys/ioctl.h>
-#include "busybox.h"
+//usage:#define deallocvt_trivial_usage
+//usage:       "[N]"
+//usage:#define deallocvt_full_usage "\n\n"
+//usage:       "Deallocate unused virtual terminal /dev/ttyN"
+
+#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 UNUSED_PARAM, 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_or_die(), VT_DISALLOCATE, (void *)(ptrdiff_t)num);
        return EXIT_SUCCESS;
 }