init: implemented switch_root and revival

initramfs/etc_rc.d_rc.switchroot.sh

@@ -0,0 +1,43 @@
+#!/bin/sh
+# --- SDE-COPYRIGHT-NOTE-BEGIN ---
+# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
+#
+# Filename: target/idunn/initramfs/etc_rc.d_rc.switchroot.sh
+# Copyright (C) 2008 The OpenSDE Project
+#
+# More information can be found in the files COPYING and README.
+#
+# 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; version 2 of the License. A copy of the
+# GNU General Public License can be found in the file COPYING.
+# --- SDE-COPYRIGHT-NOTE-END ---
+
+. /etc/rc.d/functions.in
+. /etc/conf/idunn
+
+case "$1" in
+stop)
+	# TODO: stop network
+	
+	title "Moving special filesystems"
+	for x in dev sys proc; do
+		check mount -o move "/$x" "$rootfs/$x"
+	done
+	status
+
+	;;
+revive)
+	title "Moving special filesystems back"
+	for x in dev sys proc; do
+		check mount -o move "$rootfs/$x" "/$x"
+	done
+	status
+
+	# TODO: restart network
+
+	title "Restarting Supervisor"
+	check start-stop-daemon -S -b -x /usr/bin/runsvdir -- /var/service/
+	status
+	;;
+esac

initramfs/init.sh

@@ -70,7 +70,37 @@ while true; do
 	sleep 1;
 	if [ -e /var/run/.idunn-resume ]; then
 		# switch_root requested
+		. /etc/conf/idunn
+
 		echo "switch_root in progress, you will be disconnected now." | wall
-		rm /var/run/.idunn-resume
+
+		# stop services
+		/etc/rc.d/rc.shutdown 2>&1 | tee -a $LOG
+
+		# terminate the rest
+		sleep 1
+		killall5 -s TERM
+		sleep 2
+		killall5 -s KILL
+
+		/etc/rc.d/rc.switchroot stop 2>&1 | tee -a $LOG
+
+		# and proceed
+		exec switch_root -c /dev/console "$rootfs" "$init" $initopt 2>&1 >> $LOG
+		errno=$?
+
+		# outch!
+		if [ ! -s $LOG ]; then
+			# the world is gone, time to panic
+			exit $errno
+		else
+			cat <<-EOT >> $LOG
+			switch_root failed returning $errno
+
+			EOT
+			rm -f /var/run/.idunn-resume
+
+			/etc/rc.d/rc.switchroot revive 2>&1 | tee -a $LOG
+		fi
 	fi
 done