Don't pass file descriptors to subprocesses.
Don't pass file descriptors to subprocesses.

Otherwise if a service grabs a name, spawns a daemon, and quits,
the name will not be released because the daemon uselessly inherited
the socket connecting the service to the bus.

https://lists.luon.net/pipermail/ruby-dbus-devel/2010-September/000348.html

mvidner/ruby-dbus,mvidner/ruby-dbus