On Fri, 26 Apr 2024 at 14:48, Thomas David Rivers <[email protected]> wrote:
[...]

>  I did find APAR PK80435 that references OTCBCTWACTIVE but couldn't find
> any documentation
>  on the bit itself, and I don't know if it's a programmable interface????
>
>  IBM very carefully claims:
>
>     Only the following fields are externally documented. All other fields
> are reserved for IBM use only.
>         OtcbThli
>         OtcbWLMEToken
>         OtcbSigPending
>         OtcbOapb
>
>  Any thoughts?
>

On the narrow issue of what's a Programming Interface in the OTCB,
historically all the documented z/OS UNIX control blocks were BPXYxxxx, and
the OCO ones were BPXZxxxx. Over time a few of the BPXZs have been shipped,
but generally with only a very few fields marked as PI, and in one case
(OAPB) with only the newly exposed fields shipped as a stripped down
assembler version of the larger PL/X structure.

On the larger frustrating issue you're working on, I think the best bet is
to open a ticket with IBM; if the doc does not provide enough information
to write a program using an interface, then IBM needs to fix it. Ideally
some IBMer would say to you (or here...) that "this field is improperly not
documented, we'll document how to use it in the next edition, and in the
meantime here's how to use it". This has certainly happened before, though
I don't remember z/OS UNIX being a hotbed of such revelations.

Tony H.

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