If checking for a certain DD name is really all that you need
then the easiest and fastest method IMHO is a very small ASSEMBLER (or C
or PL/1) routine
which scans the TIOT (Task I/O table) for this DD name.
The ASSEMBLER version is the easiest and shortest (and fastest); only
five to seven machine instructions.
But you can do it in C or PL/1, too. It is not very complicated, but it
does not look very good in these
languages (especially in PL/1, C is better). If you want, I could send
you the code (offline).
Kind regards
Bernd
Am 22.08.2024 um 20:33 schrieb Billy Ashton:
Well, there were a lot of interesting comments and ideas here. My
needs are pretty simple -
check to see if the DD statements I need are defined in my job before
I try to read or write them.
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