/sys$common/syshlp/helplib.hlb LGI Routines, LGI$ICB_USERPARSE, Argument  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 input_buffer

    OpenVMS usage:character string
    type:         string descriptor
    access:       read only
    mechanism:    by reference
    The input buffer must contain the characters LOGIN in the first
    five character locations, followed by an ASCII space character
    and then the user name and applicable site-specified qualifiers.