Data Stream Input Exit

Data Stream Input Exit

The Data Stream Input exit receives control when an input data stream is received by CA Dataquery from a terminal. It can examine and modify the data stream. See DQOPTLST Parameters for information about the DSIEXIT= parameter of the System Option Table.

Procedure

In the CICS environment, the exit receives no parameters. It is given control as an ordinary CICS program and can be either command or macro level. It can locate the TIOA through normal CICS facilities and can then modify it in any manner, including freeing it and allocating another of a different size. When finished, the exit should return control to CICS using CICS facilities.

Linkage

Standard linkage conventions apply. The exit must save and restore the CA Dataquery registers in a save area addressed by register 13. It must return to the address in register 14 when finished.