On Fri, 22 Dec 2023 10:36:10 -0600, Michael Oujesky wrote:

>  "/*EOF" works for me and is easy to spot, whereas "// " is
>sometimes easy to miss.
>
Avoid empirical documentation.  There may be cases you don't test.
Submit an RCF.

I believe the behavior was provided to support semi-unattended operations
with a real card reader so the operator needn't press EOF before each job.

But how might it depend on whether the job is submitted via:

o Real card reader?

o Virtual card reader to VM guest?

o SYSOUT=(,INTRDR)?

o TSO SUBMIT?

o ISPF SUBMIT?

o JES2?

o JES3?

o NJE?

o Can it be fooled by::
   - DD DATA,DLM='//'?
   - DD DATA,DLM='xx'?

Could a mischievous programmer read sensitive data in a following job?

I know with the SDSF REXX API, but not the GUI, I can read data
after the '//'.


>At 10:04 AM 12/22/2023, Bob Bridges wrote:
>
>>I should know this - I've been using JCL for decades - but I find
>>I'm uncertain about something I haven't done in a while.  I have a
>>production job here that will eventually be rewritten, but for now
>>I'm just going to tell it to execute only the first couple steps.  I
>>had in mind inserting "//" before the part of the JCL that I want to
>>skip.  Very simple.

-- 
gil

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