regarding any unix implementation of tmpfile is probably reentrant that was just a hunch as i admittedly don't know enough about unix to say that with confidence and precisely for this reason i did not say that in the main article if you see that conversation i was justifying why i wrote in the article that gnu tmpfile is reentrant which is obviously too system specific it was precisely because i don't know if other implementations are reentrant and the only objective thing i can say is that gnu tmpfile is reentrant