Quote:
Originally Posted by DMcCunney
I'm aware of AIX. It may be the oddest Unix variant.
And you can run it "native", instead of z/OS.
I'm just bemused by it as a POSIX subsystem on a z/OS host. I suspect you can use vi to edit members of a PDS, but I doubt you can use it to diddle VSAM files...
The fun part is that X-Open actually owns the Unix name, and anything that passes Spec 1170 can call itself Unix. So it was theoretically possible back when for IBM to modify MVS to do so, and with the POSIX subsystem on z/OS, it pretty much has... 
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Dennis |
Umm... VM/CMS? Available back in the late 1970's? I started my training on it...
(VM/CMS was a virtual machine setup, build by IBM to test operating system changes under, rather than giving each programmer a mainframe as a test bed. In 1977 IBM released it to customers, but few used it, because it added an extra layer of cost and complexity to system level maintenance. A few colleges and universities did, as it allowed training for multiple IBM OSes. IBM had at least three others at the time... In 1980, UNIX was not a common operating system, outside of university CompSci departments...)
As for diddling with VSAM, that may not be part of the POSNIX package, but you could write a native mode interface, providing primitives to the VSAM control programs. I did that once, back in 1985, for a high efficiency file loader program....