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[3.8] bpo-38778: Document that os.fork is not allowed in subinterpreters (GH-17123) #17179

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miss-islington merged 1 commit into from
Nov 15, 2019
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[3.8] bpo-38778: Document that os.fork is not allowed in subinterpreters (GH-17123) #17179

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10 changes: 9 additions & 1 deletion Doc/library/os.rst
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Expand Up @@ -3475,7 +3475,11 @@ written in Python, such as a mail server's external command delivery program.
parent. If an error occurs :exc:`OSError` is raised.

Note that some platforms including FreeBSD <= 6.3 and Cygwin have
known issues when using fork() from a thread.
known issues when using ``fork()`` from a thread.

.. versionchanged:: 3.8
Calling ``fork()`` in a subinterpreter is no longer supported
(:exc:`RuntimeError` is raised).

.. warning::

Expand All @@ -3492,6 +3496,10 @@ written in Python, such as a mail server's external command delivery program.
master end of the pseudo-terminal. For a more portable approach, use the
:mod:`pty` module. If an error occurs :exc:`OSError` is raised.

.. versionchanged:: 3.8
Calling ``forkpty()`` in a subinterpreter is no longer supported
(:exc:`RuntimeError` is raised).

.. availability:: some flavors of Unix.


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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Documentation/2019-11-12-15-31-09.bpo-38778.PHhTlv.rst
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@@ -0,0 +1 @@
Document the fact that :exc:`RuntimeError` is raised if :meth:`os.fork` is called in a subinterpreter.