setlogcons, from Jan Kaszka.

console-tools/Config.in

@@ -72,4 +72,10 @@ config CONFIG_SETKEYCODES
 	  This program loads entries into the kernel's scancode-to-keycode
 	  map, allowing unusual keyboards to generate usable keycodes.
 
+config CONFIG_SETLOGCONS
+	bool "setlogcons"
+	default n
+	help
+	  This program redirects the output console of kernel messages.
+
 endmenu

console-tools/Makefile.in

@@ -21,6 +21,7 @@ CONSOLETOOLS-$(CONFIG_LOADKMAP)	+= loadkmap.o
 CONSOLETOOLS-$(CONFIG_OPENVT)	+= openvt.o
 CONSOLETOOLS-$(CONFIG_RESET)	+= reset.o
 CONSOLETOOLS-$(CONFIG_SETKEYCODES)	+= setkeycodes.o
+CONSOLETOOLS-$(CONFIG_SETLOGCONS)	+= setlogcons.o
 
 ifneq ($(strip $(CONSOLETOOLS-y)),)
 libraries-y+=$(CONSOLETOOLS_DIR)$(CONSOLETOOLS_AR)

console-tools/setlogcons.c

@@ -0,0 +1,34 @@
+/*
+ * setlogcons: Send kernel messages to the current console or to console N 
+ *
+ * Copyright (C) 2006 by Jan Kiszka <jan.kiszka@web.de>
+ *
+ * Based on setlogcons (kbd-1.12) by Andries E. Brouwer
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include "busybox.h"
+
+extern int setlogcons_main(int argc, char **argv)
+{
+	struct {
+		char fn;
+		char subarg;
+	} arg;
+
+	arg.fn = 11;    /* redirect kernel messages */
+	arg.subarg = 0; /* to specified console (current as default) */
+
+	if (argc == 2)
+		arg.subarg = atoi(argv[1]);
+
+	if (ioctl(bb_xopen("/dev/tty1", O_RDONLY), TIOCLINUX, &arg))
+		bb_perror_msg_and_die("TIOCLINUX");;
+
+	return 0;
+}