/* vi: set sw=4 ts=4: */
/*
- * chvt.c - aeb - 940227 - Change virtual terminal
+ * Mini chvt implementation for busybox
*
- * busyboxed by Erik Andersen
+ * 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
*/
-#include "internal.h"
-#include <sys/types.h>
-#include <sys/ioctl.h>
-#include <linux/vt.h>
+
+/* no options, no getopt */
+
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include "busybox.h"
-extern int getfd(void);
+/* From <linux/vt.h> */
+static const int VT_ACTIVATE = 0x5606; /* make vt active */
+static const int VT_WAITACTIVE = 0x5607; /* wait for vt active */
int chvt_main(int argc, char **argv)
{
int fd, num;
- if ((argc != 2) || (**(argv + 1) == '-')) {
- usage
- ("chvt N\n\nChange foreground virtual terminal to /dev/ttyN\n");
+ if (argc != 2) {
+ bb_show_usage();
}
- fd = get_console_fd("/dev/console");
- num = atoi(argv[1]);
- if (ioctl(fd, VT_ACTIVATE, num)) {
- perror("VT_ACTIVATE");
- exit(FALSE);
- }
- if (ioctl(fd, VT_WAITACTIVE, num)) {
- perror("VT_WAITACTIVE");
- exit(FALSE);
+
+ fd = get_console_fd();
+ num = bb_xgetlarg(argv[1], 10, 0, INT_MAX);
+ if((-1 == ioctl(fd, VT_ACTIVATE, num)) ||
+ (-1 == ioctl(fd, VT_WAITACTIVE, num))) {
+ bb_perror_msg_and_die("ioctl");
}
- exit(TRUE);
+ return EXIT_SUCCESS;
}