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Huh, I never even saw this patch, in spite of the high
priority and it being assigned to me. <insert comment about
SF bugtracker>

We didn't discuss it at PyCon (at least, I wasn't party to
the discussion) but I guess this patch doesn't really hurt,
and does fix actual problems. I'm wary of fudging
fcntl/ioctl too much; I'd _much_ rather try and come up with
a decent interface for Py3k, with mutable bytestrings and
all that, maybe some nice automatic argument-type-conversion
or higher-level interface for common features (like advisory
locks) -- and only keep 2.x's fcntl working as well as it does.