Path: utzoo!attcan!uunet!zephyr.ens.tek.com!uw-beaver!uw-entropy!dataio!pilchuck!pacer!davidb
From: davidb@Pacer.UUCP (David Barts)
Newsgroups: comp.os.os9
Subject: V_Paths in SCF static storage
Message-ID: <272@zircon.UUCP>
Date: 5 Feb 90 23:11:51 GMT
Organization: Pacer Corp., Bothell, WA
Lines: 19


In the OSK technical manual, it is mentioned that the V_Paths
offset in static storage is a "Linked list of open paths.  This
is used by the kernel to determine if a non-sharable device
is already in use."

I would assume that V_Paths is a pointer to the first item in
the linked list and that a nil (zero) pointer implies that there
are no paths open to the device (and vice versa).  Thus one can
determine if any process has a device open by examining V_Paths
in the static storage area and testing for a zero value.

Unfortunately, this is only a guess.  Is there anyone on the
net who can confirm or deny this?  (If this is not the case,
then how does one use V_Paths to see if nobody has a device
open?)
-- 
David Barts			Pacer Corporation
davidb@pacer.uucp		...!fluke!pacer!davidb