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    SubjectRe: [PATCH] cowlinks v2
    On Sat, 20 March 2004 10:03:05 -0500, Patrick J. LoPresti wrote:
    > What happens if the disk fills while you are making the copy? Will
    > open(2) on an *existing file* then return ENOSPC?

    Correct. It would be possible to always succeed and return -ENOSPC
    on every write(). But then mmap() has the same problem again, so
    serious headache would be the only gain from this little excercise.

    > I do not think you can implement this without changing the interface
    > to open(2). Which means applications have to be made aware of it
    > anyway. Which means you might as well leave your implementation as-is
    > and let userspace worry about creating the copy (and dealing with the
    > resulting errors).

    Good point. Vote is now 2:0 for the simple approach.


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