getopt_ulflags -> getopt32.

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

diff --git a/console-tools/deallocvt.c b/console-tools/deallocvt.c
index ee858797ccc7ef779da698f756bd546a34f617ad..b2e8e2bef3c4afadead4b983218bc522ec5a5a34 100644 (file)
--- a/console-tools/deallocvt.c
+++ b/console-tools/deallocvt.c
@@ -1,51 +1,44 @@
 /* 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 tarball for details.
  */
-#include "internal.h"
+
+/* no options, no getopt */
+
 #include <stdlib.h>
+#include <stdio.h>
 #include <fcntl.h>
 #include <sys/types.h>
 #include <sys/ioctl.h>
-#include <linux/vt.h>
-#include <stdio.h>
+#include "busybox.h"
 
-char *progname;
+/* From <linux/vt.h> */
+enum { VT_DISALLOCATE = 0x5608 }; /* free memory associated to vt */
 
 int deallocvt_main(int argc, char *argv[])
 {
-       int fd, num, i;
+       /* num = 0 deallocate all unused consoles */
+       int num = 0;
 
-       if ((argc != 2) || (**(argv + 1) == '-')) {
-               usage
-                       ("deallocvt N\n\nDeallocate unused virtual terminal /dev/ttyN\n");
+       switch (argc) {
+               case 2:
+                       if ((num = bb_xgetlarg(argv[1], 10, 0, INT_MAX)) == 0) {
+                               bb_error_msg_and_die("0: illegal VT number");
+                       }
+               /* Fallthrough */
+               case 1:
+                       break;
+               default:
+                       bb_show_usage();
        }
 
-       progname = argv[0];
-
-       fd = get_console_fd("/dev/console");
-
-       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);
+       if (-1 == ioctl(get_console_fd(), VT_DISALLOCATE, num)) {
+               bb_perror_msg_and_die("VT_DISALLOCATE");
+       }
+       return EXIT_SUCCESS;
 }