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#!/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"
}
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