The LOGINOUT (LGI) routines are used by programmers implementing
the requirements of site security administrators or third-party
security software producers.
The LGI routines do not deal strictly with callable routines that
are internal to the OpenVMS system. The LOGINOUT callout routines
(whose names begin with LGI$ICR_) are designed by site security
administrators. The callback routines (whose names begin with
LGI$ICB_) are invoked by the callout routines.