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

[Dan Stromberg]

I don't know where the fellow got his information, but I was told that AIX
started out as AT&T code, but went through not one but two rewrites.

On Sun, May 1, 2022 at 11:55 AM Charles H Sauer (he/him) <
sauer at technologists.com> wrote:

> I don't recall that particular case, but AIX was definitely derived from
> AT&T code. See
>
> https://notes.technologists.com/notes/2017/03/08/lets-start-at-the-very-beginning-801-romp-rtpc-aix-versions/
>
> HOWEVER, when the 1983 transition happened and AIX became a primary site
> effort (as discussed in the cited reference), there were those new to
> the effort and new to Unix that thought they could redefine behaviors
> inappropriately.
>
> For example, I recall one person trying to enforce only one root login
> at a time. Larry made it quite clear to that person that we were not
> going to violate Unix tradition in that manner.
>
> Charlie
>
> On 5/1/2022 1:08 PM, ron minnich 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> 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> 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>
> 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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