[issue18673] Add and use O_TMPFILE for Linux 3.11

[Christian Heimes]

New submission from Christian Heimes:

Linux 3.11 gets a new flag for open():

Quote from http://lwn.net/Articles/557314/
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The new O_TMPFILE option to the open() and openat() system calls allows filesystems to optimize the creation of temporary files — files which need not be visible in the filesystem. When O_TMPFILE is present, the provided pathname is only used to locate the containing directory (and thus the filesystem where the temporary file should be). So, among other things, programs using O_TMPFILE should have fewer concerns about vulnerabilities resulting from symbolic link attacks.
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Tasks:

- add O_TEMPFILE to posixmodule.c
- use O_TEMPFILE in tempfile module when it's supported by the current kernel

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components: Extension Modules, Library (Lib)
messages: 194569
nosy: christian.heimes
priority: normal
severity: normal
stage: needs patch
status: open
title: Add and use O_TMPFILE for Linux 3.11
type: enhancement
versions: Python 3.4

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18673>
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