49 lines
1.1 KiB
Plaintext
Executable File
49 lines
1.1 KiB
Plaintext
Executable File
#!/sbin/runscript
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# Copyright 1999-2007 Gentoo Foundation
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# Distributed under the terms of the GNU General Public License v2
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URANDOM_SEED=${URANDOM_SEED:-/var/run/random-seed}
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description="Initializes the random number generator."
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depend() {
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need localmount
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}
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save_seed() {
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local poolsize=1
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if [ -e /proc/sys/kernel/random/poolsize ] ; then
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poolsize=$(($(cat /proc/sys/kernel/random/poolsize) / 4096))
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fi
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( # sub shell to prevent umask pollution
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umask 077
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dd if=/dev/urandom of="${URANDOM_SEED}" count=${poolsize} 2>/dev/null
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)
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}
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start() {
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[ -c /dev/urandom ] || return
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if [ -f "${URANDOM_SEED}" ] ; then
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cat "${URANDOM_SEED}" > /dev/urandom
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fi
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if ! rm -f "${URANDOM_SEED}" ; then
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ewarn "Skipping ${URANDOM_SEED} initialization (ro root?)"
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return 0
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fi
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ebegin "Initializing random number generator"
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save_seed
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eend $? "Error initializing random number generator"
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}
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stop() {
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ebegin "Saving random seed"
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# Carry a random seed from shut-down to start-up;
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# see documentation in linux/drivers/char/random.c
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save_seed
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eend $? "Failed to save random seed"
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}
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# vim: set ts=4 :
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