IBM SC34-6814-04 - Manual (Page 256)

When the task being attached is for a task started by an immediate
START command; that is, a START without an interval, the current task
is the task that issues the START command, and the fields contain
values associated with that task.
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:
v INQ_APPLICATION_DATA
v INQUIRE_SYSTEM
v WAIT_MVS
Do not use any other calls.
Exit XTDIN
When invoked
After receiving data from QSAM (for extrapartition) or VSAM (for
intrapartition).
Exit-specific parameters
UEPTDQUE
Address of the 4-byte TD queue name.
UEPTDAUD
Address of the unmodified TD data.
234 Customization Guide