[TUHS] SVR4 x86 -- Sources

Nick Downing downing.nick+tuhs at gmail.com
Tue Jul 12 19:57:11 AEST 2011

On Tue, Jul 12, 2011 at 5:54 PM, Wesley Parish
<wes.parish at paradise.net.nz> wrote:
> For what it's worth, if I remember correctly, 4.3BSD was one of the major
> contributions to SVR4. I suspect that if it hadn't been, nobody would've bought it.

My understanding had been that BSD and SysV were quite distinct and
that BSD forked off around the early research editions (V6 or V7?), if
indeed 4.3BSD was a major contributor to SVR4 then it would have been
in a few specific areas, e.g. the sockets code, because SysV had its
own competing idea called STREAMS that I believe was later discarded
(or not used much) when the BSD sockets API became the de facto
standard.  Also as I understand it, SunOS was a BSD which had heaps of
development and original ideas put into it (shared libraries I think
is one example), but was discarded as a political decision because
AT&T had managed to convince most corporate customers that BSD was
merely a hack and SysV was the "real unix", so Sun decided to create
Solaris instead by licensing SysV as a starting point, I may have
things slightly backward so I would appreciate if anyone can confirm

cheers, Nick

> From what I've read, people bought SVRx for the source code license, and then
> bought the 4.xBSD for the reliability and usability.
> And yes, it would be nice if the entire SysVRx source trees were released under
> a suitable FOSS license; but I think the usefulness of such a gesture would be
> in stymieing any future "The SCO Group" shenanigans, and I don't know that such
> acts of self-preservation are quite the flavour of the month with modern
> software companies.
> Wesley Parish
> Quoting Michael Kerpan <madcrow.maxwell at gmail.com>:
>> On Mon, Jul 11, 2011 at 6:29 AM, Michele Ghisolfo <ghisolfo.m at gmail.com>
>> wrote:
>> >  Hi,
>> >
>> >  I'm currently reading J. Lion's commentary of Unix Code Level Six.
>>  It
>> > is the most useful commentary to operating system kernel I have ever
>> > read.
>> >
>> >  It would be really useful to also have the source code of SVR4
>> kernel
>> > for Intel x86.  Does anyone have that?
>> >
>> > _______________________________________________
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>> OpenSolaris is derived from SVR4 and much of the userland stuff is
>> still quite similar to the original release. Sadly, System V as a
>> whole is still regarded as a commercial product and no source is
>> available. If you want the source code for a decent early-90s Unix
>> implementation, I'd take a look at 4.4BSD. It's not SVR4, but it's
>> from the same era and has many of the same abilities.
>> Mike
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