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

[ron minnich]

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.
>>