The IRREVX01 exit provides a common exit point for most RACF® commands. The exit gets control before and after the execution of all RACF commands except:

• BLKUPD
• RACDCERT
• RACLINK
• RACMAP
• RACPRIV
• RVARY
• Commands that cannot be issued from TSO, such as DISPLAY, RESTART, SET, SIGNOFF, and STOP. (For information on whether a command can be issued from TSO, see z/OS Security Server RACF Command Language Reference.)

For a list of the commands for which the exit gets control, and the code that is passed for each command, see the mapping of the EVXP data area in z/OS Security Server RACF Data Areas.

Using the information it receives about the command and the command issuer, the exit routine can:

• Modify a command before it executes
• Prevent a command from executing