See the constructor of the :class:`subprocess.Popen` class for parameters.
+ Availability: Unix.
+
.. method:: BaseEventLoop.subprocess_shell(protocol_factory, cmd, \*, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, universal_newlines=False, shell=True, bufsize=0, \*\*kwargs)
XXX
See the constructor of the :class:`subprocess.Popen` class for parameters.
+ Availability: Unix.
+
.. method:: BaseEventLoop.connect_read_pipe(protocol_factory, pipe)
Register read pipe in eventloop.