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PEP 433: add command line option and environment variable

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Victor Stinner 2013-01-25 23:07:44 +01:00
parent 039fc5d9da
commit c4b34e2827
1 changed files with 8 additions and 8 deletions
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pep-0433.txt
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@ -329,20 +329,20 @@ the whole application including all modules and the Python standard
library. This alternative is based on the `Proposal`_ and adds extra
changes.
Add new functions:
New functions, command line argument and environment variable:
* ``sys.getdefaultcloexec() -> bool``: get the default value of the
close-on-exec flag for new file descriptor
* ``sys.setdefaultcloexec(cloexec: bool)``: enable or disable
close-on-exec flag, the state of the flag can be overriden in each
function creating a file descriptor
*cloexec* parameter
* ``sys.setdefaultcloexec()``, ``-e`` command line option, ``PYTHONCLOEXEC``
environment variable (if set): set the default value of the *cloexec*
parameter to ``True``
The major change is that the default value of the ``cloexec`` parameter
is ``sys.getdefaultcloexec()``, instead of ``False``.
When ``sys.setdefaultcloexec(True)`` is called to set close-on-exec by
default, we have the same drawbacks as the
`Enable file descriptor inheritance by default`_ alternative.
When ``sys.setdefaultcloexec()`` is called to set close-on-exec by default, we
have the same drawbacks as the `Enable file descriptor inheritance by default`_
alternative.
There are additionnal drawbacks of having two behaviours depending on
``sys.getdefaultcloexec()`` value: