initial commit

init.d/urandom.in

@@ -0,0 +1,53 @@
+#!@SBINDIR@/openrc-run
+# Copyright (c) 2007-2015 The OpenRC Authors.
+# See the Authors file at the top-level directory of this distribution and
+# https://github.com/OpenRC/openrc/blob/master/AUTHORS
+#
+# This file is part of OpenRC. It is subject to the license terms in
+# the LICENSE file found in the top-level directory of this
+# distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE
+# This file may not be copied, modified, propagated, or distributed
+# except according to the terms contained in the LICENSE file.
+
+: ${urandom_seed:=${URANDOM_SEED:-/var/lib/misc/random-seed}}
+description="Initializes the random number generator."
+
+depend()
+{
+	after clock
+	need localmount
+	keyword -docker -jail -lxc -openvz -prefix -chroot+unshare
+}
+
+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"
+}