VMS Help LGI Routines, LGI$ICB_GET_SYSPWD, Description  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    This callback routine performs standard system password-checking
    for interactive logins on character-cell terminals only.

    If the system password is validated, this callback routine
    returns control to the caller. If the system password is not
    validated, the LOGINOUT image exits, and the login is terminated.