Documented Unix facilities (across 93 major Unix releases)

What a great surprise (but not shocking) to see it&#x27;s a work of the author of &quot;Code Reading: The Open Source Perspective&quot; [1].<p>[1]: <a href="https:&#x2F;&#x2F;www.spinellis.gr&#x2F;codereading&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.spinellis.gr&#x2F;codereading&#x2F;</a>

When they list first appearance, it&#x27;s weird that the only modern system they consider is FreeBSD.<p>There are a few interfaces that were introduced in Linux, OpenBSD, NetBSD etc. that saw subsequent broad adoption across all of modern Unix-like OSs, FreeBSD included.

Some interesting anomalies that look like errors in the tables. E.g. setjmp() present in 32V, BSD3 and BSD 4.2, but longjmp() not present. That doesn&#x27;t make sense and doesn&#x27;t match their man pages.