We have an exit for DFSORT that scans TIOT to see if someone concatenated a
DUMMY dataset as input. Here is what I believe to be the relevant snippet of
code:
*---------------------------------------------------------------------*
* THIS ROUTINE WAS ADDED TO CIRCUMVENT A PROBLEM CREATED BY DUMMY *
* FILES SPECIFIED FOR SORTIN. *
*---------------------------------------------------------------------*
DDSCAN DS 0H
EXTRACT FW,'S',FIELDS=(TIOT),MF=(E,EXTRACTL)
L R5,FW
USING IEFTIOT1,R5
MVC DDNAME,=CL8'SORTIN' SET DEFAULT DDNAME
TM ILEXF2A,ILEXFCPY Q. COPY APPLICATION ?
BZ DDSRCH A. NO, SEARCH FOR SORTIN
MVC DDNAME,=CL8'SYSUT1' A. YES, SEARCH FOR SYSUT1
DDSRCH CLC TIOEDDNM,DDNAME Q. DDNAME MATCH
BE DDCON A. YES, CHECK IT OUT
SR R0,R0 CLEAR REGISTER
IC R0,TIOELNGH GET LENGTH OF THIS ENTRY
AR R5,R0 BUMP TO NEXT ENTRY
CLI TIOELNGH,X'00' Q. END OF TIOT ?
BE RETURN A. YES, GET OUT
B DDSRCH A. NO, KEEP LOOKING
DDCON DS 0H CHECK FOR CONCATENATION
* IF NOT CONCATENATION, THEN SKIP
SR R0,R0 CLEAR REGISTER
IC R0,TIOELNGH GET LENGTH OF THIS ENTRY
AR R5,R0 BUMP TO NEXT ENTRY
CLI TIOELNGH,X'00' Q. END OF TIOT ?
BE RETURN A. YES, GET OUT
CLC TIOEDDNM,=CL8' ' Q. SORTIN CONCATENATED?
BNE RETURN A. NO, FORGET IT
SR R5,R0 A. YES, RESTORE DSECT POINTER
* CHECK FOR DUMMY DD STATEMENT
* NOTE: COULD ALSO BE DD *
DDCHK CLC TIOEFSRT,=AL3(0) Q. REAL UCB ADDRESS ?
BE DDBAD A. NO, BAD DD
SR R0,R0 CLEAR REGISTER
IC R0,TIOELNGH GET LENGTH OF THIS ENTRY
AR R5,R0 BUMP TO NEXT ENTRY
CLI TIOELNGH,X'00' Q. END OF TIOT ?
BE RETURN A. YES, GET OUT
CLC TIOEDDNM,=CL8' ' Q. SORTIN CONCATENATED?
BE DDCHK A. YES, CHECK AGAIN
B RETURN
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf
Of Micheal Butz
Sent: Thursday, January 30, 2014 3:02 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Dummy dataset
Hi,
Would anyone know if there is a way
For example scanning the TIOT
If a dataset has been dummied out
Thanks
Sent from my iPhone
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