rk on Windows or when outside the
main thread, and relies on the global state of the signal module.

.. versionchanged:: 1.6.0
   Allowing the timeout argument to be a float.

.. versionchanged:: 1.7.0
   Added the **close_output** argument.

:param str tor_cmd: command for starting tor
:param list args: additional arguments for tor
:param str torrc_path: location of the torrc for us to use
:param int completion_percent: percent of bootstrap completion at which
  this'll return
:param functor init_msg_handler: optional functor that will be provided with
  tor's initialization stdout as we get it
:param int timeout: time after which the attempt to start tor is aborted, no
  timeouts are applied if **None**
:param bool take_ownership: asserts ownership over the tor process so it
  aborts if this python process terminates or a :class:`~stem.control.Controller`
  we establish to it disconnects
:param bool close_output: closes tor's stdout and stderr streams when
  bootstrapping is complete if true
:param str stdin: content to provide on stdin

:returns: **subprocess.Popen** instance for the tor subprocess

:raises: **OSError** if we either fail to create the tor process or reached a
  timeout without success
Nz/You cannot launch tor with a timeout on WindowsÚ