Replace current verbose GPL stuff in libbb/*.c with one-line GPL boilerplate.

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

diff --git a/console-tools/chvt.c b/console-tools/chvt.c
index 7909645868c05a867ca8a7055c6f48e9dc2f198d..aff66e007019632ec6be03cde4992fcceb5e1495 100644 (file)
--- a/console-tools/chvt.c
+++ b/console-tools/chvt.c
@@ -1,44 +1,38 @@
 /* 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 "busybox.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_usage);
-       fd = get_console_fd("/dev/console");
-       num = atoi(argv[1]);
-       if (ioctl(fd, VT_ACTIVATE, num)) {
-               perror("VT_ACTIVATE");
-               return EXIT_FAILURE;
+       if (argc != 2) {
+               bb_show_usage();
        }
-       if (ioctl(fd, VT_WAITACTIVE, num)) {
-               perror("VT_WAITACTIVE");
-               return EXIT_FAILURE;
+
+       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 EXIT_SUCCESS;
 }
-
-
-/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/