On 2018-01-30, at 21:30:33, Jon Perryman wrote:
>> Steve Thompson wrote:> It causes me to wonder, why DSORG causes a problem
>> with a path or
>
>> a file. After all, unless you know something special about the
>> file, aren't all files DSORG=PS -- Physical Sequential in EXT,
>>
I believe that Using Data Sets states that PO.DATA.SET(MEMBER)
opens as sequential. But I discover that OPEN still fills the
DCB with PO, not PS. Experts say this is normal.
>> EXT2, btrfs, hfs, zfs, etc.? Ok, in hfs and zfs they are
>> emulating an FBA device, but still...
>
> Programs do not access Unix files. Specifying path causes a Unix address
> space to handle the file. It communicates with the program thru the subsystem
> file
>
Isn't the same true for JES files?
> (not disk). It is up to the subsystem to follow the protocol that the DCB
> requires. Obviously, they decided not to implement every feature which is why
> it fails.
>
Pretty much my understanding. And that subsystem does a creditable
job of following that protocol. HLASM handles UNIX (subsystem) files
well for SYSIN, SYSLIN, SYSPRINT, and SYSLIB. (It took a couple of
APARs before nested COPY members worked for me -- some wild POINTs,
some ABENDs.)
My SR on Rexx SYSEXEC went about like this:
gil> Rexx fails with a UNIX directory as SYSEXEC. Using Data Sets
says any combination of PDS, PDSE, and UNIX directories is a
valid partitioned concatenation.
IBM> Rexx checks and (in this case) requires DSORG=PO. WAD.
gil> That check is superfluous. It should be removed.
IBM> Then OPEN might ABEND if DSORG were wrong. WAD.
gil> Let it ABEND. A failure is a failure.
IBM> ABEND is a more severe failure and must be avoided. WAD.
Spitefully, I tried a concatenation of a PDS followed by a VSAM
data set as SYSEXEC. Rexx OPEN ABENDed. I opened a new SR on
the ABEND
gil> ABEND occurs when SYSEXEC is a concatenation of PO and VSAM.
IBM> Predictable. User error.
gil> (Citing my earlier SR) IBM has told me that Rexx must not abend.
IBM> User error. SR closed.
I suppose I forgot Emerson on Consistency.
I didn't go to RFE. I suppose my chances were slim.
-- gil
