[issue36843] AIX build fails with failure to get random numbers

[STINNER Victor]

STINNER Victor <vstinner at redhat.com> added the comment:

Robert Boehne: pyurandom() uses _Py_open_noraise("/dev/urandom", O_RDONLY) which uses O_CLOEXEC if available. If this flag available? Does it work?

Please try to build attached urandom.c.

Example on my Fedora 29:

open O_RDONLY succeeded
read(16) -> 16
open O_RDONLY | O_CLOEXEC succeeded
read(16) -> 16

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Added file: https://bugs.python.org/file48322/urandom.c

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