&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 loginD 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$VERIFY_PROXY, asD well as the undocumented image activation service SYS$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.