6b2b5d2acd
* at least in initscripts it's consistent now (From OE-Core rev: 20d5effcf192d469883b5ac899cbd2340b71bd2c) Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
1.3 KiB
Executable File
#!/bin/sh
BEGIN INIT INFO
Provides: urandom
Required-Start: $local_fs mountvirtfs
Required-Stop: $local_fs
Default-Start: S
Default-Stop: 0 6
Short-Description: Save and restore the random seed
Description: Save the random seed on shutdown and restore it on boot,
to ensure that the seed isn't predicable on startup
(because the boot process is predictable)
END INIT INFO
test -c /dev/urandom || exit 0 . /etc/default/rcS
case "$1" in
start|"")
test "$VERBOSE" != no && echo "Initializing random number generator..."
# Load and then save 512 bytes,
# which is the size of the entropy pool
if test -f /var/lib/urandom/random-seed
then
cat /var/lib/urandom/random-seed >/dev/urandom
fi
rm -f /var/lib/urandom/random-seed
umask 077
dd if=/dev/urandom of=/var/lib/urandom/random-seed count=1
>/dev/null 2>&1 || echo "urandom start: failed."
umask 022
;;
stop)
# Carry a random seed from shut-down to start-up;
# see documentation in linux/drivers/char/random.c
test "$VERBOSE" != no && echo "Saving random seed..."
umask 077
dd if=/dev/urandom of=/var/lib/urandom/random-seed count=1
>/dev/null 2>&1 || echo "urandom stop: failed."
;;
*)
echo "Usage: urandom {start|stop}" >&2
exit 1
;;
esac
exit 0