package/base-files/files/etc/init.d/urandom_seed

   1 #!/bin/sh /etc/rc.common
   2
   3 START=99
   4
   5 EXTRA_COMMANDS="save"
   6
   7 _log() {
   8     logger -t urandom_seed "$1"
   9 }
  10
  11 _save() {
  12     touch $1.tmp || { _log "touch $1 failed"; return; }
  13     chown root:root $1.tmp || { _log "chown $1 failed"; return; }
  14     chmod 600 $1.tmp || { _log "chmod $1 failed"; return; }
  15     getrandom 512 > $1.tmp || { _log "getrandom failed"; return; }
  16     mv $1.tmp $1 || { _log "mv $1 failed"; return; }
  17 }
  18
  19 save() {
  20     SEED="$(uci -q get system.@system[0].urandom_seed)"
  21     [ "${SEED:0:1}" == "/" ] && _save "$SEED" && _log "Seed saved ($SEED)"
  22
  23     SEED=/etc/urandom.seed
  24     [ ! -f $SEED ] && _save "$SEED" && _log "Seed saved ($SEED)"
  25 }
  26
  27 boot() {
  28     save
  29 }