File: //etc/init/upstart-udev-bridge.conf
# upstart-udev-bridge - Bridge udev events into upstart
#
# This helper daemon receives udev events from the netlink socket and
# emits equivalent Upstart events.
description "Bridge udev events into upstart"
# From upstart-udev-bridge itself
emits *-device-added
emits *-device-removed
emits *-device-changed
# From http://www.kernel.org/pub/linux/utils/kernel/hotplug/libudev/libudev-udev-device.html
emits *-device-online
emits *-device-offline
start on starting udev
stop on stopped udev
expect daemon
respawn
exec upstart-udev-bridge --daemon