(Don Pearce) writes:
I don't know if it is the same in all OS, but for temp files I
generally use a word relevant to the programme plus the current
process ID number. This pretty much guarantees a unique name that
won't be used by anyone else.

Both are highly predictable values. If you’re not using O_EXCL then you
probably have a security vulnerability.

--
http://www.greenend.org.uk/rjk/