Bump to version 1.22.1

[platform/upstream/busybox.git] / console-tools / deallocvt.c

diff --git a/console-tools/deallocvt.c b/console-tools/deallocvt.c
index a1b8e4e..b131c0a 100644 (file)
--- a/console-tools/deallocvt.c
+++ b/console-tools/deallocvt.c
@@ -1,55 +1,38 @@
 /* vi: set sw=4 ts=4: */
 /*
- * disalloc.c - aeb - 940501 - Disallocate virtual terminal(s)
- * Renamed deallocvt.
+ * Disallocate virtual terminal(s)
+ *
+ * Copyright (C) 2003 by Tito Ragusa <farmatito@tiscali.it>
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
-#include "internal.h"
-#include <stdlib.h>
-#include <fcntl.h>
-#include <sys/types.h>
-#include <sys/ioctl.h>
-#include <linux/vt.h>
-#include <stdio.h>
 
-char *progname;
+/* no options, no getopt */
 
-int deallocvt_main(int argc, char *argv[])
-{
-       int fd, num, i;
+//usage:#define deallocvt_trivial_usage
+//usage:       "[N]"
+//usage:#define deallocvt_full_usage "\n\n"
+//usage:       "Deallocate unused virtual terminal /dev/ttyN"
 
-       if ((argc != 2) || (**(argv + 1) == '-')) {
-               usage
-                       ("deallocvt N\n"
-#ifndef BB_FEATURE_TRIVIAL_HELP
-                        "\nDeallocate unused virtual terminal /dev/ttyN\n"
-#endif
-                        );
-       }
+#include "libbb.h"
 
-       progname = argv[0];
+/* From <linux/vt.h> */
+enum { VT_DISALLOCATE = 0x5608 }; /* free memory associated to vt */
 
-       fd = get_console_fd("/dev/console");
+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;
+
+       if (argv[1]) {
+               if (argv[2])
+                       bb_show_usage();
+               num = xatou_range(argv[1], 1, 63);
+       }
 
-       if (argc == 1) {
-               /* deallocate all unused consoles */
-               if (ioctl(fd, VT_DISALLOCATE, 0)) {
-                       perror("VT_DISALLOCATE");
-                       exit(1);
-               }
-       } else
-               for (i = 1; i < argc; i++) {
-                       num = atoi(argv[i]);
-                       if (num == 0)
-                               fprintf(stderr, "%s: 0: illegal VT number\n", progname);
-                       else if (num == 1)
-                               fprintf(stderr, "%s: VT 1 cannot be deallocated\n",
-                                               progname);
-                       else if (ioctl(fd, VT_DISALLOCATE, num)) {
-                               perror("VT_DISALLOCATE");
-                               fprintf(stderr, "%s: could not deallocate console %d\n",
-                                               progname, num);
-                               exit(1);
-                       }
-               }
-       exit(0);
+       /* 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;
 }