[Python-Dev] PEP 446: Open issues/questions

[Victor Stinner]

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