saving uncommitted changes in /etc prior to emerge run

init.d/udev-postmount

@@ -0,0 +1,55 @@
+#!/sbin/runscript
+# Copyright 1999-2013 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+depend()
+{
+	need localmount
+	keyword -vserver -lxc
+}
+
+dir_writeable()
+{
+        touch "$1"/.test.$$ 2>/dev/null && rm "$1"/.test.$$
+}
+
+# store persistent-rules that got created while booting
+# when / was still read-only
+store_persistent_rules()
+{
+	# create /etc/udev/rules.d if it does not exist and /etc/udev is writable
+	[ -d /etc/udev/rules.d ] || \
+		dir_writeable /etc/udev && \
+		mkdir -p /etc/udev/rules.d
+
+	# only continue if rules-directory is writable
+	dir_writeable /etc/udev/rules.d || return 0
+
+	local file dest
+	for file in /run/udev/tmp-rules--*; do
+		dest=${file##*tmp-rules--}
+		[ "$dest" = '*' ] && break
+		type=${dest##70-persistent-}
+		type=${type%%.rules}
+		ebegin "Saving udev persistent ${type} rules to /etc/udev/rules.d"
+		cat "$file" >> /etc/udev/rules.d/"$dest" && rm -f "$file"
+		eend $? "Failed moving persistent rules!"
+	done
+}
+
+start()
+{
+	# check if this system uses udev
+	[ -d /run/udev ] || return 0
+
+	# store persistent-rules that got created while booting
+	# when / was still read-only
+	store_persistent_rules
+}
+
+stop()
+{
+	return 0
+}
+
+# vim:ts=4