I'm soliciting suggestions for what I might put in an RCF.
The JCL Ref. for DD * contains an example containing
the enigmatic line:
Extra line to make DD * variable record length
There is no text accompanying the example explaining
how or why this might work, nor is there a similar
example for DD DATA. Are they different?
The example appears to have been cribbed from an SR I
submitted around 2017 which was never resolved.
I'd like to know what governs the attributes merged by
OPEN into the DCB for SYSIN DD. Empirically, it seems
for JES2:
o If LRECL is specified on the DD statement, that value
is merged into the DCB.
o Otherwise, if no record exceeds 80 bytes, the attributes
are RECFM=FB,LRECL=80.
o Otherwise, if all lines are of equal length, the
attributes are RECFM=FB,LRECL=length of any line.
o Otherwise, RECFM=VB,LRECL=4+length of longest line.
JES3 seems to be different: RECFM is always FB.
This (or the facts if I'm in error) should be documented
in text, not left to be inferred empirically or by example.
I copied directly to INTRDR from a RECFM=VB file,
bypassing TSO SUBMIT.
Any suggested enhancements for an RCF?
Thanks,
gil
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