I bet your source was right. I don't have inside knowledge, but as one of the first Unixes to try to make a serious business out of it, and as an arguable prog

I bet your source was right. I don't have inside knowledge, but as one of the first Unixes to try to make a serious business out of it, and as an arguable progenitor of the SysV approach, it wouldn't surprise me. That said, POSIX was never designed for general portability. Just as a seal of unifying approval and sanity for existing practice; far more descriptive than prescriptive.