respect CFLAGS/CPPFLAGS in env

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

diff --git a/console-tools/deallocvt.c b/console-tools/deallocvt.c
index 15cd0c9b9a76b3087f795887f0f869485b2a6b6e..cd581b1c835f457685a7ced0060ed591668c0250 100644 (file)
--- a/console-tools/deallocvt.c
+++ b/console-tools/deallocvt.c
@@ -1,43 +1,37 @@
 /* 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 <stdlib.h>
-#include <stdio.h>
-#include <fcntl.h>
-#include <sys/types.h>
-#include <sys/ioctl.h>
+
+/* no options, no getopt */
+
 #include "busybox.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 fd, num, i;
-
-       //if ((argc > 2) || ((argv == 2) && (**(argv + 1) == '-')))
-       if (argc > 2)
-               show_usage();
+       /* num = 0 deallocate all unused consoles */
+       int num = 0;
 
-       fd = get_console_fd("/dev/console");
-
-       if (argc == 1) {
-               /* deallocate all unused consoles */
-               if (ioctl(fd, VT_DISALLOCATE, 0))
-                       perror_msg_and_die("VT_DISALLOCATE");
-       } else {
-               for (i = 1; i < argc; i++) {
-                       num = atoi(argv[i]);
-                       if (num == 0)
-                               error_msg("0: illegal VT number");
-                       else if (num == 1)
-                               error_msg("VT 1 cannot be deallocated");
-                       else if (ioctl(fd, VT_DISALLOCATE, num))
-                               perror_msg_and_die("VT_DISALLOCATE");
-               }
+       switch (argc) {
+       case 2:
+               num = xatoul_range(argv[1], 1, 63);
+               /* Fallthrough */
+       case 1:
+               break;
+       default:
+               bb_show_usage();
        }
 
+       if (-1 == ioctl(get_console_fd(), VT_DISALLOCATE, num)) {
+               bb_perror_msg_and_die("VT_DISALLOCATE");
+       }
        return EXIT_SUCCESS;
 }