openwrtv4/package/base-files/files/sbin/urandom_seed
Etienne CHAMPETIER 35e423ca41 base-files: use procd init for urandom_seed
Previous implementation was blocking the init and
breaking halt/reboot/sysupgrade (reported by Daniel Golle)

v2: use procd logging, use set -e + trap for error handling

Signed-off-by: Etienne CHAMPETIER <champetier.etienne@gmail.com>
Tested-by: Daniel Golle <daniel@makrotopia.org>
2016-07-27 01:24:54 +02:00

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#!/bin/sh
set -e
trap '[ "$?" -eq 0 ] || echo "An error occured" >&2' EXIT
save() {
touch "$1.tmp"
chown root:root "$1.tmp"
chmod 600 "$1.tmp"
getrandom 512 > "$1.tmp"
mv "$1.tmp" "$1"
echo "Seed saved ($1)"
}
SEED="$(uci -q get system.@system[0].urandom_seed || true)"
[ "${SEED:0:1}" == "/" ] && save "$SEED"
SEED=/etc/urandom.seed
[ ! -f $SEED ] && save "$SEED"
true