Timothy, Very nice. Many of us old folks don’t remember. Wasn’t z/OS Unix System Services based on Posix ? It’s seems I heard this sometime ago.
Regards, Scott On Wed, Apr 15, 2020 at 10:47 AM David Crayford <[email protected]> wrote: > Isn't this all obsolete now? Linux and Windows are used everywhere and I > doubt anybody cares about POSIX certification. > > On 2020-04-15 10:01 PM, Charles Mills wrote: > > Well, you've obviously researched it more than I care to. > > > > I guess this is what I am thinking of: "The NT POSIX subsystem was > included > > with the first versions of Windows NT because of 1980s US federal > government > > requirements listed in Federal Information Processing Standard (FIPS) > > 151-2.[1] Briefly, these documents required that certain types of > government > > purchases be POSIX-compliant, so that if Windows NT had not included this > > subsystem, computing systems based on it would not have been eligible for > > some government contracts. Windows NT versions 3.5, 3.51 and 4.0 were > > certified as compliant with FIPS 151-2." -- > > https://en.wikipedia.org/wiki/Microsoft_POSIX_subsystem (and more or > less as > > you say) > > > > Some history here: https://en.wikipedia.org/wiki/Unix_wars > > > > Charles > > > > > > -----Original Message----- > > From: IBM Mainframe Discussion List [mailto:[email protected]] On > > Behalf Of Timothy Sipples > > Sent: Tuesday, April 14, 2020 10:59 PM > > To: [email protected] > > Subject: Re: Any shop use UNIX in a production job? > > > > Charles Mills wrote: > >> A trivia question: Which of these is UNIX? Windows Server or Linux? > > I replied: > >> Neither. > > Charles Mills then replied: > >> Which *used to be* UNIX? > > Still neither. > > > > I can find no evidence that Microsoft ever obtained a UNIX(TM) > > certification for any Windows operating system or even obtained a license > > for UNIX source code from AT&T or another authorized party specifically > to > > ship any subsystem or product on/for Windows.(*) However, Microsoft > > evidently would not have been upset if you thought otherwise. :-) > > > > Here's the thumbnail history as I understand it. Back in 1996 a company > > called Softway Systems (later renamed Interix) shipped a product called > > OpenNT for Microsoft's Windows NT operating system. OpenNT apparently was > > written "cleanroom," meaning that it didn't license or use UNIX source > > code from AT&T or another authorized party. OpenNT was a POSIX subsystem, > > and at some point -- possibly starting pre-Microsoft -- it was POSIX > > certified. > > > > Meanwhile, Microsoft separately developed the "Microsoft POSIX subsystem" > > and included it in early releases of Windows NT. Microsoft did this to > get > > FIPS 151-2 certification so that the U.S. federal government could > > consider Windows NT for more of its acquisitions. > > > > Later, Microsoft acquired Interix, updated the technology, positioned it > > as a replacement for their own POSIX subsystem, and renamed the > technology > > in this sequence: "Microsoft Windows Services for UNIX" (sometimes "Unix" > > in references) then "Windows Subsystem for UNIX-based Applications." > > However, these products/subsystems were never certified as UNIX(TM) > > either. The preposition "for" in their names is quite meaningful and > doing > > a lot of heavy lifting. Initially Microsoft's versions were separately > > chargeable, and then at the very end they were no additional charge > > downloads. > > > > In a completely separate effort, David Korn created UWIN, which is an > > X/Open library and set of utilities for Win32. UWIN isn't UNIX(TM) > either. > > Ironically, AT&T, UNIX's inventor, now distributes UWIN's source code -- > > but that doesn't make it UNIX(TM) either: > > > > https://github.com/att/uwin > > > > OK, so that was/is Microsoft Windows. In fact Microsoft has distributed a > > bona fide UNIX operating system in the past: XENIX (also sometimes > written > > Xenix). XENIX was definitely a genuine UNIX(TM) operating system. > > Microsoft licensed AT&T's UNIX source code (Version 7 then later System > > V), and XENIX also includes bits of BSD. The Santa Cruz Operation (SCO) > > eventually acquired exclusive rights to XENIX, and that branch of the > > very, very complicated UNIX family tree essentially died out, losing out > > to SCO UNIX. But during much of the 1980s Microsoft XENIX from its > various > > OEMs (including IBM) was the most popular UNIX(TM) distribution. > > > > (*) The UNIX trademark owner made/makes the final call. > > > > - - - - - - - - - - > > Timothy Sipples > > I.T. Architect Executive > > Digital Asset & Other Industry Solutions > > IBM Z & LinuxONE > > - - - - - - - - - - > > E-Mail: [email protected] > > > > ---------------------------------------------------------------------- > > For IBM-MAIN subscribe / signoff / archive access instructions, > > send email to [email protected] with the message: INFO IBM-MAIN > > > > ---------------------------------------------------------------------- > > For IBM-MAIN subscribe / signoff / archive access instructions, > > send email to [email protected] with the message: INFO IBM-MAIN > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > -- Scott Ford IDMWORKS z/OS Development ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
