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2006-11-29
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#! /bin/sh
# Copyright (c) 1998-2002 SuSE Linux AG, Nuernberg, Germany.
# All rights reserved.
#
# Author: Burchard Steinbild, 1998
# originally from Theodore Ts'o <tytso@mit.edu>
#
# Please send feedback to http://www.suse.de/feedback
#
# /etc/init.d/random
#
# Script to snapshot random state and reload it at boot time.
#
# Saves and restores system entropy pool for higher quality
# random number generation.
#
### BEGIN INIT INFO
# Provides: random
# Required-Start:
# Required-Stop:
# Default-Start: 2 3 5
# Default-Stop:
# Description: Script to snapshot random state and reload it at boot time.
### END INIT INFO
. /etc/rc.status
random_seed=/var/lib/misc/random-seed
rc_reset
case "$1" in
start)
echo -n "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 test -f $random_seed ; then
cat $random_seed > /dev/urandom
rc_status
else
> $random_seed
rc_status
fi
chmod 600 $random_seed
dd if=/dev/urandom of=$random_seed count=1 bs=512 2>/dev/null
rc_status -v
;;
stop)
# Carry a random seed from shut-down to start-up
# Save 512 bytes, which is the size of the entropy pool
echo -n "Saving random seed"
if test ! -f $random_seed ; then
> $random_seed
rc_status
fi
chmod 600 $random_seed
dd if=/dev/urandom of=$random_seed count=1 bs=512 2>/dev/null
rc_status -v
;;
status)
echo -n "Checking for random generator (always true)"
rc_status -v
;;
*)
echo "Usage: $0 {start|stop|status}"
exit 1
esac
rc_exit