#!/bin/sh
#
# random	Script to snapshot random state and reload it at boot time.
#
# Author:       Theodore Ts'o <tytso@mit.edu>
#

random_seed=/var/run/random-seed

# See how we were called.
case "$1" in
  start)
	echo "Initializing random number generator..."
	# Carry a random seed from start-up to start-up
	# Load and then save 512 bytes, which is the size of the entropy pool
	if [ -f $random_seed ]; then
		cat $random_seed >/dev/urandom
	fi
	dd if=/dev/urandom of=$random_seed count=1 bs=512 2>/dev/null
	touch /var/lock/subsys/random

	;;
  stop)
	# Carry a random seed from shut-down to start-up
	# Save 512 bytes, which is the size of the entropy pool
	echo "Saving random seed..."
	dd if=/dev/urandom of=$random_seed count=1 bs=512 2>/dev/null
	
	rm -f /var/lock/subsys/random
	;;
  *)
	echo "Usage: random {start|stop}"
	exit 1
esac

exit 0