Hmmm.. Is this a test? Game playing?
...But,it seems that's not the method my manager expects.
well, of course first you just ask your manager what method he does
expect you to use!
REXX is useful. A better job will require a little assembler
too. You may need extra seal meat for the sled dogs.
There's no perfect answer to this question. Identifying the programs
named on EXEC PGM= statements is a start. And of course you'll have
to allow catalogued procedures to be expanded, so the TYPRUN=SCAN
approach will be useful for that. That will get you (golfers, turn
away at this point) a fair way down the fairway but it wont tell you
about the programs that those PGM=.. programs themselves invoke, et cetera.
It's possible for data-driven conditions, some of which might happen,
say, but once a year, to cause the selective loading and/or execution
of otherwise un-referenced programs. You cannot make a definitive
determination of this from an analysis of JCL, expanded or otherwise.
With those limitations in mind, I'd probably start by building a faux
job stream, with the same //JOBLIB DD and //STEPLIB DD as each
production job has, but with each step executing my REXX and passing
into it the corresponding PGM= program name as a parameter (you can
omit all other DD statements). I'd have my REXX call my assembler
module to LOAD the specified program and determine which library
(STEPLIB/ JOBLIB/ LINKLIST/ LPA..) that the program was actually
retrieved from. The assembler bit would return the library name, or
a null string if the program wasn't found, to the REXX. The REXX
would add/append this information to some database or flat file.
This approach will enable you to identify, in a substantial, but
still incomplete, way, which programs exist and which libraries are
involved, and of course, which programs can't be found.
Keep in mind that the mere presence of a JOBLIB or STEPLIB DD doesn't
guarantee that the program named on the EXEC PGM=.. statement
actually resides in one of those libraries, it may be in a linklisted
library or an LPA.. library instead (or as well, in fact it may be in
many libraries!).
I'd grill your manager a little more before you code anything.
Graeme.
(Just 9 days to Midyear, revellers!)
At 07:39 PM 12/06/2006, you wrote:
Hi,
Recently I've got a mission from my manager. He asked me:If I got a JCL
which runs many cobol programs,how can I
know whether these load modules exist or not without actually running it?
<Darren, I've snipped a few lines here 'cos the server rejected my post!>
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