S9 EXT  (sys:setgid integer)  ==>  unspecific
        (sys:setuid integer)  ==>  unspecific

Change the group ID (user ID) of the S9 process to the given
INTEGER. Only the superuser may change the UID/GID of a process
to a value other than the current UID/GID.

(sys:setgid (sys:getgid))  ==>  unspecific
(sys:setuid (sys:getuid))  ==>  unspecific
