[Python-Dev] PEP 446: Open issues/questions (original) (raw)
Victor Stinner victor.stinner at gmail.com
Sun Jul 28 02:39:19 CEST 2013
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Hi,
I have a few more questions on the PEP 446:
(A) How should we support support where os.set_inheritable() is not supported? Can we announce that os.set_inheritable() is always available or not? Does such platform exist?
(B) Should subprocess make the file descriptors of pass_fds inheritable? If yes, should it be done before or after the fork? If it is done after the fork and before exec, it only affects the child process, at least on Linux (the file descriptor is still non-inheritable in the parent process).
(C) Should we handle standard streams (0: stdin, 1: stdout, 2: stderr) differently? For example, os.dup2(fd, 0) should make the file descriptor 0 (stdin) inheritable or non-inheritable? On Windows, os.set_inheritable(fd, False) fails (error 87, invalid argument) on standard streams (0, 1, 2) and copies of the standard streams (created by os.dup()).
Victor
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