TSO/E provides an initialization exit and a termination exit for the PARMLIB command. You can use the exits to customize PARMLIB processing for your users. The initialization exit receives control before the PARMLIB command processor invokes the parse service routine to parse the command. The termination exit receives control just before the PARMLIB command processor completes processing. If the initialization exit returns successfully to PARMLIB and PARMLIB processing itself abends, the PARMLIB command processor invokes the termination exit before it terminates.

You can use the initialization exit to check that users have authority to use the PARMLIB command, change the operands that users specify on the command, and change the values of the operands.

You can use the termination exit to perform clean-up or special processing prior to PARMLIB completion. Depending on the processing your initialization exit performs, you may not need a corresponding termination exit.