def start(self):
"""
Start process.
.. note::
Process will be considered started, when defined banner will appear
in process output.
"""
Executor.start(self)
# get a polling object
self.poll_obj = select.poll()
# register a file descriptor
# POLLIN because we will wait for data to read
self.poll_obj.register(self.output(), select.POLLIN)
try:
self.wait_for(self._wait_for_output)
# unregister the file descriptor and delete the polling object
self.poll_obj.unregister(self.output())
finally:
del self.poll_obj
