INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - LOCK FILE SET
AH = CBh
if function C6h lock mode 00h:
DL = mode
00h no wait
01h wait
if function C6h lock mode 01h:
BP = lock timeout in timer ticks (1/18 sec) 0000h = no wait
Return: AL = status
00h successful
FEh timed out
FFh failed
Desc:   attempt to lock all files listed in the log table
Notes:  this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
Alloy NTNX
status FFh will be returned if one or more of the files have already
been exclusively locked by another process
SeeAlso: AH=CDh,AH=D1h,AH=EBh

See also: 21CA

21CB - Novell NetWare - SYNCHRONIZATION SERVICES - LOCK FILE SET