package/base-files/files/sbin/urandom_seed

   1 #!/bin/sh
   2 set -e
   3
   4 trap '[ "$?" -eq 0 ] || echo "An error occured" >&2' EXIT
   5
   6 save() {
   7     touch "$1.tmp"
   8     chown root:root "$1.tmp"
   9     chmod 600 "$1.tmp"
  10     getrandom 512 > "$1.tmp"
  11     mv "$1.tmp" "$1"
  12     echo "Seed saved ($1)"
  13 }
  14
  15 SEED="$(uci -q get system.@system[0].urandom_seed || true)"
  16 [ "${SEED:0:1}" == "/" ] && save "$SEED"
  17
  18 SEED=/etc/urandom.seed
  19 [ ! -f $SEED ] && save "$SEED"
  20 true