/* 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>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
-#include "internal.h"
+
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/ioctl.h>
+#include "busybox.h"
/* From <linux/vt.h> */
-#define VT_ACTIVATE 0x5606 /* make vt active */
-#define VT_WAITACTIVE 0x5607 /* wait for vt active */
-
+enum {
+ VT_ACTIVATE = 0x5606, /* make vt active */
+ 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"
-#ifndef BB_FEATURE_TRIVIAL_HELP
- "\nChanges the foreground virtual terminal to /dev/ttyN\n"
-#endif
- );
- }
- fd = get_console_fd("/dev/console");
- num = atoi(argv[1]);
- if (ioctl(fd, VT_ACTIVATE, num)) {
- perror("VT_ACTIVATE");
- exit(FALSE);
+ if (argc != 2) {
+ bb_show_usage();
}
- 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");
}
- return(TRUE);
+ return EXIT_SUCCESS;
}
-
-
-/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/