saving uncommitted changes in /etc prior to emerge run

init.d/urandom

@@ -0,0 +1,45 @@
+#!/sbin/runscript
+# Copyright (c) 2007-2009 Roy Marples <roy@marples.name>
+# Released under the 2-clause BSD license.
+
+: ${urandom_seed:=${URANDOM_SEED:-/var/lib/misc/random-seed}}
+description="Initializes the random number generator."
+
+depend()
+{
+	need localmount
+	keyword -jail -lxc -openvz -prefix
+}
+
+save_seed()
+{
+	local psz=1
+
+	if [ -e /proc/sys/kernel/random/poolsize ]; then
+		: $(( psz = $(cat /proc/sys/kernel/random/poolsize) / 4096 ))
+	fi
+
+	(	# sub shell to prevent umask pollution
+		umask 077
+		dd if=/dev/urandom of="$urandom_seed" count=${psz} 2>/dev/null
+	)
+}
+
+start()
+{
+	[ -c /dev/urandom ] || return
+	if [ -f "$urandom_seed" ]; then
+		ebegin "Initializing random number generator"
+		cat "$urandom_seed" > /dev/urandom
+		eend $? "Error initializing random number generator"
+	fi
+	rm -f "$urandom_seed" && save_seed
+	return 0
+}
+
+stop()
+{
+	ebegin "Saving random seed"
+	save_seed
+	eend $? "Failed to save random seed"
+}