Then again ...
Why would a rational programmer cause an "empty" record to be written in
the first place? To give the programmer writing the code to process the
data a little something extra to do? To make sure the testers are doing
their job? What?
Vacation Notice: None
Tom Puddicombe
Mainframe Performance & Capacity Planning
CSC
31 Brookdale Rd, Meriden, CT 06450
ITIS | (860) 428-3252 | tpudd...@csc.com | www.csc.com
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From: Paul Gilmartin <paulgboul...@aim.com>
To: IBM-MAIN@listserv.ua.edu
Date: 10/03/2012 05:35 PM
Subject: Zero length records outlawed! (Again.)
Sent by: IBM Mainframe Discussion List <IBM-MAIN@listserv.ua.edu>
In:
Title: z/OS V1R13 DFSMS Using Data Sets
Document Number: SC26-7410-11
2.1.2.2.1 Record Processing for UNIX Files
I read:
Each record prefix is mapped by the IGGRPFX macro. It is the following
four bytes:
Offset Length Symbol Description
0 1 RPFX00 Reserved.
1 3 RPFXLLL Length of record that follows this
prefix.
... If any record in the file consists of zero bytes (that is, the
length field in
the record prefix contains zero) or if any record is longer than the
length
of the buffer, it results in an error return code for GET.
Sigh. Morons. Why did they do that!? It's like being back in old OS/360
which specified the minimum count field in an RDW as 5.
-- gil
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