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Wed Aug 24 15:31:50 CEST 2011 · https://mail.python.org/pipermail/python-dev/2011-August/113029.html

> The buildbots are complaining about some of tests for the new
> socket.sendmsg/recvmsg added by issue #6560 for *nix platforms that
> provide CMSG_LEN.

Looks like kernel bugs:
http://developer.apple.com/library/mac/#qa/qa1541/_index.html

"""
Yes. Mac OS X 10.5 fixes a number of kernel bugs related to descriptor passing
[...]
Avoid passing two or more descriptors back-to-back.
"""

We should probably add
@requires_mac_ver(10, 5)

for testFDPassSeparate and testFDPassSeparateMinSpace.

As for InterruptedSendTimeoutTest and testInterruptedSendmsgTimeout,
it also looks like a kernel bug: the syscall should fail with EINTR
once the socket buffer is full. I guess one should skip those on OS-X.

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[Python-Dev] sendmsg/recvmsg on Mac OS X