Yes. The distinction I made was meant to be between calls that end up calling into the system and ones that do not (like strtok()). I agree with what you say an

Yes. The distinction I made was meant to be between calls that end up calling into the system and ones that do not (like strtok()). I agree with what you say and my statement was exactly that the stable APIs into the system offered by POSX are mostly unproblematic.