IBM SC33-1683-02 - Manual (Page 250)

Transient data program exits XTDREQ, XTDIN, and XTDOUT
Exit XTDREQ
When invoked
Before request analysis.
Exit-specific parameters
UEPTDQUE
Address of 4-byte TD queue name.
UEPTDTYP
Address of 1-byte TD request type. Values are:
UEPTDPUT
PUT request
UEPTDGET
GET request
UEPTDPUR
PURGE request.
Return codes
UERCNORM
Continue TD processing.
UERCTDOK
Quit TD processing – returning ‘NORMAL’ to the caller.
UERCTDNA
Quit TD processing – returning ‘NOTAUTH’ to the caller.
UERCPURG
Task purged during XPI call.
XPI calls
You can use:
INQ_APPLICATION_DATA
INQUIRE_SYSTEM
WAIT_MVS
Do not use any other calls.
transient data program exits
218 CICS TS for OS/390: CICS Customization Guide