async def get_system_bus(self) -> MessageBus:
if self._dbus is not None:
return self._dbus
async with self._dbus_connect_lock:
try:
try:
bus = await MessageBus(bus_type=BusType.SYSTEM).connect()
except AuthError:
# Fallback to anonymous connection
bus = await MessageBus(bus_type=BusType.SYSTEM,
auth=AuthAnnonymous()).connect()
except OSError as e:
raise api.DBusNotAvailableException() from e
self._dbus = bus
return bus
def stub_fail_bus(self) -> None:
self._stub_bus_connected.set_exception(
api.DBusNotAvailableException("Stub connection failed")
)