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bpo-26836: Add os.memfd_create() (#13567)

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* bpo-26836: Add os.memfd_create()

* Use the glibc wrapper for memfd_create()

Co-Authored-By: Christian Heimes <christian@python.org>

* Fix deletions caused by autoreconf.

* Use MFD_CLOEXEC as the default value for *flags*.

* Add memset_s to configure.ac.

* Revert memset_s changes.

* Apply the requested changes.

* Tweak the docs.
This commit is contained in:
Zackery Spytz 2019-05-29 13:57:07 -06:00 • committed by Christian Heimes
parent 0c2f930564
commit 43fdbd2729
10 changed files with 259 additions and 12 deletions
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38
Doc/library/os.rst
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@ -2982,6 +2982,44 @@ features:
Added support for :class:`bytes` paths.
.. function:: memfd_create(name[, flags=os.MFD_CLOEXEC])
Create an anonymous file and return a file descriptor that refers to it.
*flags* must be one of the ``os.MFD_*`` constants available on the system
(or a bitwise ORed combination of them). By default, the new file
descriptor is :ref:`non-inheritable <fd_inheritance>`.
.. availability:: Linux 3.17 or newer with glibc 2.27 or newer.
.. versionadded:: 3.8
.. data:: MFD_CLOEXEC
MFD_ALLOW_SEALING
MFD_HUGETLB
MFD_HUGE_SHIFT
MFD_HUGE_MASK
MFD_HUGE_64KB
MFD_HUGE_512KB
MFD_HUGE_1MB
MFD_HUGE_2MB
MFD_HUGE_8MB
MFD_HUGE_16MB
MFD_HUGE_32MB
MFD_HUGE_256MB
MFD_HUGE_512MB
MFD_HUGE_1GB
MFD_HUGE_2GB
MFD_HUGE_16GB
These flags can be passed to :func:`memfd_create`.
.. availability:: Linux 3.17 or newer with glibc 2.27 or newer. The
``MFD_HUGE*`` flags are only available since Linux 4.14.
.. versionadded:: 3.8
Linux extended attributes
~~~~~~~~~~~~~~~~~~~~~~~~~