Are all commercial flavors of UNIX derived from AT&T System V code?

sk43999

September 10, 2006

SCO, 2nd amended complaint [108]:

"All commercial UNIX 'flavors' in use today are modifications of, and
derivative works based on, the UNIX System V Technology ('System V
Technology').

"SCO is .. the ... owner of copyrights related to UNIX System V source code"

------------------

www.unix.org, flavors_of_unix
http://www.unix.org/what_is_unix/flavors_of_unix.html:

"... OS/390 is the first product to guarantee conformance to the Single UNIX
Specification, and therefore to carry the label UNIX 95, that is not
derived from the AT&T/ SCO source code."

11:12:37


Re: Are all commercial flavors of UNIX derived from AT&T System V code?

MathFox

September 11, 2006

"All commercial UNIX 'flavors' in use today are modifications of, and derivative works based on, the UNIX System V Technology ('System V Technology').

Off course, with a proper (re-)definition of "commercial", "modification" and "UNIX" you can get pretty close to the truth. A good place to start research is the Unix history page (http://www.levenez.com/unix/).
It is known that in the early (pre-1990) days it was common to take both the BSD codebase and a AT&T license. Basing your own system of BSD and then add some SYSV stuff was a common route. There is little AT&T code directly copied in many commercial Unices; in many cases the code was available for review. A case of "your code was developed next to the place my code was stored." Nobody cared, because the companies had an AT&T redistribution license anyway.

4:01:09 AM


Re: Are all commercial flavors of UNIX derived from AT&T System V code?

monsieur_bobo

September 11, 2006

Apple's MacOSX is based on Darwin which in turn is based on NextOS which was based on Mach. I doubt there is much, if any AT&T code in OSX.
It surely is not based on SysV.

 12:15:38 PM


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