11 Dec
2018
11 Dec
'18
6:43 p.m.
From: Clem Cole
I could be mis remembering
No... :-)
IIRC the original PTY driver goes back to the Rand
and/or UofI for the
NCP.
Yup. I found a pty.c in the NCP system, it's clearly the ancestor (comments
match):
https://minnie.tuhs.org//cgi-bin/utree.pl?file=SRI-NOSC/dmr/pty.c
I suspect BBN got it from the Bruce Borden's Rand
distribution tape
Or possibly indirectly; my copy of the NCP came from NOSC via SRI. In addition
to the one above, there are also these:
https://minnie.tuhs.org//cgi-bin/utree.pl?file=SRI-NOSC/dmr/misc/pty.c.ill
https://minnie.tuhs.org//cgi-bin/utree.pl?file=SRI-NOSC/dmr/misc/pty.c.x
Here:
https://minnie.tuhs.org//cgi-bin/utree.pl?file=BBN-V6/dmr/pty.c
is the BBN version, you can compare the them all. The MIT one is derived from
the BBN one.
Named Piped were definiately a Rand-ism (they were
originally called 'Rand Pipes')
Well, _RAND_ called them 'ports':
https://minnie.tuhs.org//cgi-bin/utree.pl?file=BBN-V6/doc/ipc/ports
But there were issues and somethings were not 100%
until the UofI NCP;
which was the first really complete NCP for UNIX.
Somewhere I found a document about the UofI code, I think they wrote it from
scratch? Sorry, too lazy to look at it. See here:
https://minnie.tuhs.org//cgi-bin/utree.pl?file=SRI-NOSC
for links.
Noel