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PEP 446: add new os.get/set_blocking() functions

This commit is contained in:
Victor Stinner 2013-07-07 15:05:58 +02:00
parent 9cb23db25d
commit 010039d965
1 changed files with 11 additions and 2 deletions
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13
pep-0446.txt
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@ -127,21 +127,30 @@ The atomicity is not guaranteed. If the platform does not support
setting close-on-exec and blocking flags at the creation of the file
descriptor or socket, the flags are set using additional system calls.
New Functions
-------------
Add new functions the get and set the close-on-exec flag of a file
descriptor:
descriptor, available on all platforms:
* ``os.get_cloexec(fd:int) -> bool``
* ``os.set_cloexec(fd:int, cloexec: bool)``
Add new functions the get and set the blocking flag of a file
descriptor, only available on UNIX:
* ``os.get_blocking(fd:int) -> bool``
* ``os.set_blocking(fd:int, blocking: bool)``
Other Changes
-------------
The ``subprocess.Popen`` class must clear the close-on-exec flag of file
descriptors of the ``pass_fds`` parameter.
descriptors of the ``pass_fds`` parameter. The flag is cleared in the
child process before executing the program, the change does not change
the flag in the parent process.
The close-on-exec flag must also be set on private file descriptors and
sockets in the Python standard library. For example, on UNIX,