VTAM® terminal management program exit XZCATT

Exit XZCATT

When invoked
Before task attach for terminal tasks.
Exit-specific parameters
UEPTCTTE
Address of the terminal control table terminal entry (TCTTE). The TCTTE can be mapped using the DSECT DFHTCTTE.
UEPTIOA
Address of the terminal input/output area (TIOA). The TIOA can be mapped using the DSECT DFHTIOA. However, fields TIOASAL and TIOASCA are not programming interfaces.
UEPTPN
Address of the APPC transaction process name (TPN), or the LU6.1 process name (DPN), whose length is addressed by the parameter UEPTPNL.
UEPTPNL
Address of a 1-byte field containing the length of the TPN or DPN.
UEPTRAN
Address of the 4-byte transaction ID.
Note:
The exit program must not change the TRANSID of tasks started by automatic transaction initiation (ATI). (This is because CICS® needs to match the TRANSID in its program control table with the TRANSID in the automatic initiate descriptor (AID) that was created in the AOR.)
Return codes
UERCNORM
Continue processing.
XPI calls
All can be used.

Related concepts
Overview -- what is a global user exit?
Overview of the XPI
Global user exit XPI examples, showing the use of storage
Related tasks
Writing global user exit programs
Making an XPI call
Related reference
List of global user exit points
The XPI functions
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