Blocking I/O in MessageBus init #569
Description
Describe the bug
blockbuster found that this library is doing blocking I/O in the MessageBus constructor:
Traceback (most recent call last):
File "/usr/src/supervisor/supervisor/dbus/manager.py", line 125, in load
self._bus = connected_bus = await MessageBus(
~~~~~~~~~~^
bus_type=BusType.SYSTEM
^^^^^^^^^^^^^^^^^^^^^^^
).connect()
^
File "/usr/local/lib/python3.13/site-packages/dbus_fast/aio/message_bus.py", line 209, in __init__
super().__init__(bus_address, bus_type, ProxyObject, negotiate_unix_fd)
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "src/dbus_fast/message_bus.py", line 176, in dbus_fast.message_bus.BaseMessageBus.__init__
File "src/dbus_fast/message_bus.py", line 747, in dbus_fast.message_bus.BaseMessageBus._setup_socket
File "src/dbus_fast/message_bus.py", line 709, in dbus_fast.message_bus.BaseMessageBus._setup_socket
File "/usr/local/lib/python3.13/site-packages/blockbuster/blockbuster.py", line 109, in wrapper
raise BlockingError(func_name)
blockbuster.blockbuster.BlockingError: Blocking call to socket.socket.connect
It seems the library is calling socket.connect() in _setup_socket.
To Reproduce
Connect to D-Bus with blockbuster enabled.
Additional context