Many TSO/E exits receive a TSO/E standard exit parameter list and are referred to in this document as standard-format exits. TSO/E standard exit parameter list describes the standard parameter list for these exits.

See Overview of exits that TSO/E provides for a lists all of the exits that TSO/E provides.

You use the initialization exit to receive control at the beginning of the execution of a specific command or function and to change the default processing or extend processing capability. The initialization exit for a TSO/E command processor receives control before the command processor invokes the parse service routine to parse the command. You can use initialization exits to change the operands a user specifies on a command and to perform other processing to customize a command's or a function's processing.

Termination exits receive control just before a function's or command processor's completion. You can use termination exits for clean-up processing. If the initialization exit or other exits for a command or function obtain storage, you must write a termination exit to free the storage.

TSO/E provides an example exit (IKJEXIT) in SYS1.SAMPLIB that uses the standard exit parameter list. The example may be helpful in writing exit routines for standard-format exits. Example installation exit describes the example.