devnode is the Hurd devnode translator. It exposes a Mach device as
a filesystem node (hence "devnode"), so you can do open("/dev/foobar")
then device_open("foobar"). In particular this means that the
Unix permission model can be used to manage access to the fs node,
rather than you having to have the device master port (= be root).
GNU Hurd/
hurd/
translator/
devnode