W dniu 22.01.2025 o 17:50, Paul Gilmartin pisze:
On Wed, 22 Jan 2025 08:53:00 -0600, Jay Maynard wrote:
And it's a remarkable fact that MVS was the first non-Unix to get POSIX
certification...
Oxymoron?
Or is "POSIX certification" different from "UNIX Branding"?
Otherwise, with that certification MVS lost its distinction as a
"non-Unix".
Perhaps the word "formerly" belongs there somewhere.
Dialectic. Or matter of definition. 1. If your toy car or fishing rod
behave as Unix - it is unix. It can mechanical computer, whatever. Black
box. 2. Unix is a clone or fork or descendant or child of some Unix. In
that case many popular Unixes were not Unix as defined in p.1. Reason:
non-compliance with the standard. AFAIR there was a time where some
OS/390 was UNIX certified, but HP-UX was not. Or maybe it was Irix, but
I believe it was HP-UX. BTW: Unix systems are very similar one to each
other... unless we look at "ls" command switches. Or first character in
"drwxrwxrwx" (different set of possible values, different meanings).
Etc. etc. ;-) Of course Solaris and HP-UX are unixes, despite of their
standard-compliance status and mutual differences. Linux is not Unix,
because... it is not certified?
--
Radoslaw Skorupka
Lodz, Poland
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