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

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

post_upgrade() {
  [ -f tmp/busybox.upgrade.script ] && busybox chmod `busybox cat tmp/busybox.upgrade.script` usr/bin/busybox
  busybox rm -f tmp/busybox.upgrade.script
  echo "busybox is in /usr/bin now. Readjust its mode if you modified it."
}