Guardian Procedure Calls Reference Manual

Condition Code Settings
indicates that ALTERPRIORITY failed, or no process designated as process-id exists.< (CCL)
indicates that the priority of the process is altered.= (CCE)
does not return from ALTERPRIORITY.> (CCG)
Considerations
When ALTERPRIORITY is called on a Guardian process, the caller must be either the super ID
(255,255), the group manager (n,255) of the process access ID, or a process with the same
process access ID as the process or process pair whose priority is being changed. For more
information about the process access ID, see the PROCESSACCESSID procedure Considerations
(page 1131) and the Guardian Programmer's Guide.
When ALTERPRIORTY is called on an OSS process, the security rules that apply are the same as
those that apply to calling the OSS kill() function. See the kill(2) function reference page
either online or in the Open System Services System Calls Reference Manual for details.
68 Guardian Procedure Calls (A-B)