> On 2 May 2022, at 03:08, Kenneth Goodwin 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 > 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 > > 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 > wrote: > >> > >> Mark Williams Coherent was one I worked with on the PC many years ago. > >> > >> > On May 1, 2022, at 11:34, Andrew Warkentin > 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. > >>