1 files changed, 56 insertions, 0 deletions
diff --git a/busybox/console-tools/deallocvt.c b/busybox/console-tools/deallocvt.c
new file mode 100644
index 0000000..08a9d21
--- /dev/null
+++ b/busybox/console-tools/deallocvt.c
@@ -0,0 +1,56 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Disallocate virtual terminal(s)
+ *
+ * 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
+ */
+
+/* no options, no getopt */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include "busybox.h"
+
+/* From <linux/vt.h> */
+static const int VT_DISALLOCATE = 0x5608;  /* free memory associated to vt */
+
+int deallocvt_main(int argc, 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:
+			bb_show_usage();
+	}
+
+	if (ioctl( get_console_fd(), VT_DISALLOCATE, num )) {
+		bb_perror_msg_and_die("VT_DISALLOCATE");
+	}
+	return EXIT_SUCCESS;
+}