package/base-files/files/lib/preinit/81_urandom_seed

   1 #!/bin/sh
   2
   3 log_urandom_seed() {
   4     echo "urandom-seed: $1" > /dev/kmsg
   5 }
   6
   7 _do_urandom_seed() {
   8     [ -f "$1" ] || { log_urandom_seed "Seed file not found ($1)"; return; }
   9     [ -O "$1" -a -G "$1" -a ! -x "$1" ] || { log_urandom_seed "Wrong owner / permissions for $1"; return; }
  10
  11     log_urandom_seed "Seeding with $1"
  12     cat "$1" > /dev/urandom
  13 }
  14
  15 do_urandom_seed() {
  16     [ -c /dev/urandom ] || { log_urandom_seed "Something is wrong with /dev/urandom"; return; }
  17
  18     _do_urandom_seed "/etc/urandom.seed"
  19
  20     SEED="$(uci -q get system.@system[0].urandom_seed)"
  21     [ "${SEED:0:1}" == "/" -a "$SEED" != "/etc/urandom.seed" ] && _do_urandom_seed "$SEED"
  22 }
  23
  24 boot_hook_add preinit_main do_urandom_seed