gtpi1m0b | System Installation Support Reference |
To install control program user exits, do the following:
- Update or replace copy member CUSR in CCUEXT. The IBM supplied copy
of CUSR has user exit routine labels that are equated to a value of zero (EQU
0). When you install a user exit routine, remove the predefined entry
point label and place it at the beginning of the user exit routine.
Then add your code to the CUSR copy member.
- Assemble and link-edit the CCUEXT CSECT. The user exit routine is
then incorporated in the control program. If the user exit routine is
installed for a nondynamic exit point, no more action is required and the exit
routine will be invoked by the control program whenever the exit point is
met.
However, if a dynamic exit routine was installed, you must also provide a
program that will issue UXCMC macros to activate or deactivate the appropriate
exit point in order for the exit routine to be useable.
- Note:
- To properly code a user exit routine, the programmer must be thoroughly
familiar with the internals of the control program.