TSO/E supplies many subcommands for the TESTAUTH command, and many commands that can be invoked under TESTAUTH. If you need additional testing functions, you can write your own command processors or subcommand processors for use with TESTAUTH. You must first write the command or subcommand processor itself, and then define it to the TESTAUTH command. To do so, follow the same procedures described in Adding TEST subcommands and command processors. When you define a command or subcommand to TEST in SYS1.PARMLIB member IKJTSOxx or in CSECT IKJEGSCU, the subcommand or command is available to both TEST and TESTAUTH.

If you want to restrict a subcommand to TEST or TESTAUTH, you can use the subcommand's initialization exit to check its environment and cancel the subcommand if invoked under the wrong command.