post_install() {
  echo "You may want to do setuid on /bin/busybox"
  echo "  chmod 4555 /bin/busybox"
}

pre_upgrade() {
  stat -c %a bin/busybox >tmp/busybox.upgrade.script
}

post_upgrade() {
  [ -f tmp/busybox.upgrade.script ] && chmod `cat tmp/busybox.upgrade.script` bin/busybox
  rm -f tmp/busybox.upgrade.script
}