1 files changed, 46 insertions, 0 deletions
diff --git a/init.d/urandom.in b/init.d/urandom.in
new file mode 100644
index 0000000..6e90100
--- /dev/null
+++ b/init.d/urandom.in
@@ -0,0 +1,46 @@
+#!/sbin/runscript
+# Copyright 2007-2008 Roy Marples <roy@marples.name>
+# All rights reserved. Released under the 2-clause BSD license.
+
+urandom_seed=${urandom_seed:-${URANDOM_SEED:-/var/run/random-seed}}
+
+description="Initializes the random number generator."
+
+depend()
+{
+	need localmount
+	keyword nojail noprefix
+}
+
+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"
+}