mc-wait-for-name runs until a bus name appears, then exits successfully. This can be used as a service-activation helper for a bus name
that is not directly activatable, but will be provided automatically (after a while) by the desktop session.
0 The bus name eventually appeared.
Invocation error (too many or too few arguments, or the bus name given was not a syntactically valid well-known bus name).
mc-wait-for-name was unable to connect to the session bus.
The name did not appear within a reasonable time.