On Thu, Oct 30, 2014 at 05:01:30PM -0700, Andy Lutomirski wrote:
> > flink()), the mode really matters. So this idiotic glibc behavior of
> > only forwarding the third argument if O_CREAT is set seems to be a
> > bug.
> 
> We could bite the bullet and add a tmpfile syscall.   /me ducks

I've got another use case for that:  Samba.  It wants to inherit
all kinds of attributes (xattrs, modes, etc) during file creation,
and right now it's doing it in a racy way.  I've come up with a patch
to use O_TEMPFILE + flink, but it turns out that Samba may as well
be asked to create read-only files, which we can't create using
O_TMPFILE.
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