For example strtol, you may pass whatever (implicitly nul terminated, which is bad) and it either returns a value or an error. I wasnt advocating _you_ don't k

For example strtol, you may pass whatever (implicitly nul terminated, which is bad) and it either returns a value or an error. I wasnt advocating _you_ don't know what to pass but that the caller doesn't include specifics of the callee.