post_install() {
  getent group dbus &>/dev/null || groupadd -r -g 81 dbus >/dev/null
  getent passwd dbus &>/dev/null || useradd -r -u 81 -d / -g dbus -s /usr/bin/nologin dbus >/dev/null
}

post_upgrade() {
  post_install

  # Make sure new rc script can shutdown running dbus
  if [ -f run/dbus.pid -a -d run/dbus ]; then
    mv run/dbus.pid run/dbus/pid
  fi
}