& CHKLGI, UTILITIES, User Authentication  @         CHKLGI is a routine which allows you to perform the sameC         checks and tasks as LOGINOUT.EXE (the system's login image) B         when a new process is logged in. You may check for correctC         passwords, login restrictions, perform ALF (automatic login D         facility) and proxy-related operations, update the intrusion<         database and perform system auditing of your logins.  D         CHKLGI shows the use of many less-known system services likeA         SYS$AUDIT_EVENT, SYS$SCAN_INTRUSION, SYS$VERIFY_PROXY, as D         well as the undocumented image activation service SYS$IMGACTG         and the license-related services SYS$GRANT_LICENSE, SYS$LOOKUP_ A         LICENSE and SYS$RELEASE_LICENSE. It also shows how to use >         item lists in C (for SYS$GETUAI) and some other useful@         techniques. Finally, the MACRO-32 program, which runs in?         kernel mode, shows how to scan the PCB (process control ?         block) vector array and how to extract information from *         these and related data structures.  