20 Jan
2023
20 Jan
'23
2:08 a.m.
Accidentally sent this only to the person I was replying to.
I am getting some grief on Twitter too for
"omitting" FreeBSD. I
didn't, but the BSDs don't fit either definition of "Unix". The
pre-1993 one being "based on AT&T code" -- after all, BSD (4.4 Lite r2
was it? Before my time!) -- went to a lot of effort to eliminate AT&T
code.
From what I've seen it's very much a gradual transition; 4.3-Tahoe starts to
have the new code and UCB copyright notices with the predecessor of what we call
the "BSD License" appearing in some of the source files. Then with Reno, a
majority of the userland is open-sourced, and Net/2 is fairly complete. (Net/2
and 4.4BSD-Lite / Lite/2 were lacking a few things.) But even right up until
the end things were in a state of flux.
A few things weren't finished until much later by the FreeBSD, OpenBSD and
NetBSD people.
-uso.