On 06 Oct 2010, at 09:41, Michael Van Canneyt wrote:
This is always true on Unix, the only way to make sure is to have
the kernel
create the temporary name and file for you. Unix - to my knowledge -
does not have a way to create and lock a file in one atomic
operation; There are
always 2 operations involved, and so anything can happen between the 2
calls.
You can at least open a file with O_CREAT|O_EXCL|O_NOFOLLOW to make
sure that it does not yet exist at the point that you create it (and
that it's not a symlink either).
Jonas
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