peps: ce61588d244c (original) (raw)

Mercurial > peps

changeset 4984:ce61588d244c

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

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--- a/pep-0446.txt +++ b/pep-0446.txt @@ -127,21 +127,30 @@ The atomicity is not guaranteed. If the 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,