z/VM: CP Commands and Utilities Reference - z/VM - IBM

MODIFY COMMAND / CMD
Responses
6. Once defined, an alias name cannot be used again. An alias cannot be
modified or eliminated; it can only be disabled.
7. To load the command processing code into CP’s system execution space, use
the CPXLOAD command (page 101).
8. To activate a CP command:
v While defining it, use the ENABLE operand of the DEFINE COMMAND or
CMD command (page 134).
v After defining it, use the ENABLE COMMAND or CMD command (page
426).
9. To display the real address of the CP command table entry block, the current
IBM class, and the current privilege class for a specified CP command, use the
LOCATE CMDBK command (page 528).
10. To deactivate a CP command:
v While defining it, use the DISABLE operand of the DEFINE COMMAND or
CMD command (page 134).
v After defining it, use the DISABLE COMMAND or CMD command (page
263).
11. To remove the command processing code from CP’s system execution space,
use the CPXUNLOAD command (page 107).
12. MODIFY COMMAND RESET will not allow a RESET to occur if the resulting
command versions would have different EPNAMEs. This can occur if you
change the EPNAME for a command then add a new version for that
command. To avoid this restriction, you should add new versions of a
command before changing the EPNAMEs associated with the command.
13. The SILENTly and NOTSILENTly option must be applied to all versions of a
command.
14. For more information about user-defined commands, see the z/VM: CP Exit
Customization book.
Response 1:
To change the CP SHUTDOWN command from privilege class A to privilege class
S, enter the following:
modify command shutdown privclasses s
Ready;
Response 2:
602 z/VM: CP Commands and Utilities Reference
To change the version of the CP SET PRIVCLASS command that allows users with
any privilege class to issue the command to a version that allows only users with
privilege class G and Z to issue the command, enter the following:
locate cmdbk set subcmd privc
Subcommand CMDBK Alias IBMCLASS Privilege
PRIVCLASS 12345678 * C C
PRIVCLASS 76543218 * 0
Ready;
modify cmd set subcmd privc ibmclass 0 privclasses gz
Ready;
locate cmdbk set subcmd privc
Subcommand CMDBK Alias IBMCLASS Privilege