code: def recv_exit_status(self):
          
          self.status_event.wait()
          assert self.status_event.is_set()
          return self.exit_status
docs: Return the exit status from the process on the server.  This is
          mostly useful for retrieving the results of an `exec_command`.
          If the command hasn't finished yet, this method will wait until
          it does, or until the channel is closed.  If no exit status is
          provided by the server, -1 is returned.
  
          .. warning::
              In some situations, receiving remote output larger than the current
              `.Transport` or session's ``window_size`` (e.g. that set by the
              ``default_window_size`` kwarg for `.Transport.__init__`) will cause
              `.recv_exit_status` to hang indefinitely if it is called prior to a
              sufficiently large `.Channel.recv` (or if there are no threads
              calling `.Channel.recv` in the background).
  
              In these cases, ensuring that `.recv_exit_status` is called *after*
              `.Channel.recv` (or, again, using threads) can avoid the hang.
  
          :return: the exit code (as an `int`) of the process on the server.
  
          .. versionadded:: 1.2