12 Aug
2022
12 Aug
'22
5:41 p.m.
On Fri, Aug 12, 2022 at 05:15:52AM -0600, arnold(a)skeeve.com wrote:
Paul Ruizendaal via TUHS <tuhs(a)tuhs.org>
wrote:
"Release 4.0 was launched from this organization in March. It introduced
new IPC mechanisms"
from pg 39 of Pirzada's thesis
https://spiral.imperial.ac.uk/bitstream/10044/1/7942/1/Shamim_Sharfuddin_Pi…
referred to in tuhs/Documentation/Emails/dmr_wkt
"Other treasures: Shamim Pirzada did most of a PhD thesis on Unix
as an exemplar of software evolution for Imperial College (London)
that (in the part I have) contains a pretty good account of details
of history up to about 1988."
I’m interested in the journey of SysV IPC. So far
I have established
that these originated in CBUnix, with a lot of thinking on how to optimize
these around the time that Unix 3.0/4.0/5.0 happened. They did not appear
in Unix 3.0 / SysIII, and from the Unix 4.0 documentation I gather that
it was not included there either.
I am not sure you can make that conclusion, as the 4.0 printed documents
did not include the programmer's manual; instead they gave out the
3.0 manual and there was a list of changes somewhere in the other doc.
Unfortunately, without actual 4.0 sources, it will always be a question.
I have this VERY vague memory that I saw IPC in 4.0, but I could
very easily be wrong... It was over 40 years ago, after all. :-)