INT 21 - Novell NetWare - FILE SERVER - GET CONNECTION'S OPEN FILES
        AH = E3h subfn DBh
        DS:SI -> request buffer (see below)
        ES:DI -> reply buffer (see below)
Return: AL = status
            00h successful
            C6h no console rights
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
SeeAlso: AH=E3h/SF=C8h,AH=E3h/SF=DAh,AH=E3h/SF=DCh,AH=E3h/SF=DFh

Format of request buffer:
Offset  Size    Description
 00h    WORD    0005h (length of following data)
 02h    BYTE    DBh (subfunction "Get Connection's Open Files")
 03h    WORD    logical connection number (big-endian)
 05h    WORD    last record seen (big-endian)
                0000h on first call

Format of reply buffer:
Offset  Size    Description
 00h    WORD    (call) size of following results record (max 1FEh)
 02h    WORD    next request record (place in "last record" field on next call)
                0000h if no more records
 04h    BYTE    number of records following
 05h    File Information Records [array]
        Offset  Size    Description
         00h    BYTE    task number
         01h    BYTE    lock flags (see below)
         02h    BYTE    access flags (see below)
         03h    BYTE    lock type
                        00h no lock
                        FEh file lock
                        FFh locked by Begin Share File Set
         04h    BYTE    volume number (00h-1Fh)
         05h    WORD    directory entry (big-endian)
         07h 14 BYTEs   ASCIZ filename

Bitmask of lock flags:
 bit 0: file is locked
 bit 1: file opened Shareable
 bit 2: logged
 bit 3: file opened Normal
 bit 6: TTS holding lock
 bit 7: Transaction Flag set on file

Bitmask of access flags:
 bit 0: file open for reading by calling station
 bit 1: file open for writing by calling station
 bit 2: deny reads by other stations
 bit 3: deny writes by other stations
 bit 4: file detached
 bit 5: TTS Holding Detach
 bit 6: TTS Holding Open