(C) 1998 AROS - The Amiga Research OS
"physical" -- Name of file or directory to get a Lock from.
Result -- an error code return which may be one of:
ASSIGN_OK everything worked this time. ASSIGN_NODEV "physical" did not represent a valid directory. ASSIGN_FATAL Something is really rotten somewhere. ASSIGN_CANCEL Attempt to cancel something (like a volume) that can't be canceled.