[TUHS] First Unix-like OSes not derived from AT&T code?

[Dr Iain Maoileoin]

> On 2 May 2022, at 03:08, Kenneth Goodwin <kennethgoodwin56 at gmail.com> wrote:
> 
> My understanding of AIX was that IBM licensed the System V source code and then proceeded to "make it their own". I had a days experience with it on a POS cash register fixing a client issue. The shocker - they changed all the error messages to error codes with a look at the manual requirement.
> 
> Not sure if this is true in its entirety or not.
> But that's what I recall, thst it was not a from scratch rewrite but more along the lines of other vendor UNIX clones of the time. 
> License the source, change the name and then beat it to death.
In the UK in the 80s IBM had large bill-board adverts that ran along the lines of “…we took UNIX and added a million lines of code …..”.
I always thought (rather unfairly) YES, and every one of them was wrong.

However one of my car registration plates is "AIX OK”.  I changed my mind later on….
> 
> On Sun, May 1, 2022, 2:08 PM ron minnich <rminnich at gmail.com <mailto:rminnich at gmail.com>> wrote:
> in terms of rewrites from manuals, while it was not the first, as I
> understand it, AIX was an example of "read the manual, write the
> code."
> 
> Unlike Coherent, it had lots of cases of things not done quite right.
> One standout in my mind was mkdir -p, which would return an error if
> the full path existed. oops.
> 
> But it was pointed out to me that Condor had all kinds of code to
> handle AIX being different from just about everything else.
> 
> 
> On Sun, May 1, 2022 at 7:12 AM Kenneth Goodwin
> <kennethgoodwin56 at gmail.com <mailto:kennethgoodwin56 at gmail.com>> wrote:
> >
> > I actually purchased several copies of Coherent when it was first released and used it as printer servers for a bunch of inexpensive Centronics based printers. lpd based server to server transfers. Took the printing burden off the main systems. Someone came out with a network based print spooler box (Milan ??) later on which I switched over to after MW passed into obscurity.
> >
> >
> > On Sun, May 1, 2022, 7:46 AM Ron Natalie <ron at ronnatalie.com <mailto:ron at ronnatalie.com>> wrote:
> >>
> >> Mark Williams Coherent was one I worked with on the PC many years ago.
> >>
> >> > On May 1, 2022, at 11:34, Andrew Warkentin <andreww591 at gmail.com <mailto:andreww591 at gmail.com>> wrote:
> >> >
> >> > What was the first "clone" functional Unix (i.e. an OS not derived
> >> > from genetic Unix code but highly compatible with genetic Unix)? Idris
> >> > is the earliest such OS of which I am aware (at least AFAIK it's not a
> >> > genetic Unix), but was it actually the first? Similarly, which was the
> >> > first "outer Unix-like" system (i.e. one with strong Unix influence
> >> > but significantly incompatible with functional Unix)? Off the top of
> >> > my head the earliest such system I can think of is Thoth (which
> >> > predates Idris by almost 2 years), but again I'm not sure if it was
> >> > actually the first.
> >>

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