[cvsnt] Re: NAV vs. CVSNT

[Glen Starrett]

I have set up the "file exclusions" on my server to exclude my repositories
and temp directory for CVS.  I don't know now if I am treading on thin ice
tempting the bug or if I've actually found a reasonable way around it.

Does anyone know if this will work or not?  I have regular file shares on
the server as well as the CVS repositories and don't really want to depend
on the clients to keep themselves clean.

Glen Starrett

-----Original Message-----
From: cvsnt-bounces at cvsnt.org [mailto:cvsnt-bounces at cvsnt.org]On Behalf
Of Tony Hoyle
Sent: Friday, February 28, 2003 8:50 AM
To: cvsnt at cvsnt.org
Subject: [cvsnt] Re: NAV vs. CVSNT


On Fri, 28 Feb 2003 16:30:03 +0200, Ori Berger <cvsnt-newsgroups at orib.net>
wrote:


>Internally, to delete a file on NT, one has to do the following:
>1. Open the file with Delete permission
>2. Mark the file 'pending deletion'
>3. Close the file
>
Actually it's worse than that... step 3 breaks down to
3a. Request that the system closes the file
3b. System returns 'Done' then goes away and thinks about it
3c. File closed.

There is a few milliseconds between the file closing and it actually being
unlocked - this is an NT bug, but quite a subtle one (you normally won't hit
it unless you'd doing a lot of file I/O on a heavily loaded system such as
cvsnt).  Recent builds have been restructured to increase the delay slightly
between close and rename for this reason.

What some AV products do (NAV is one I think) is grab the request at 3b,
then
go and virus scan it - unfortunately this takes a *lot* more than a few
milliseconds, so standard code which does:

create temp file.
write data to temp file
close temp file
rename temp file to real file

...Fails when these AV products are loaded.  I'm surprised this doesn't
affect
more software than it does, because it's a *very* standard way to make
changes.

Since it's not a bug in cvsnt I'm not going to waste any more time on it...
I'm relying on standard behaviour from the system.  If the AV breaks that
behaviour that's not my problem.

Tony

_______________________________________________
cvsnt mailing list
cvsnt at cvsnt.org
http://www.cvsnt.org/cgi-bin/mailman/listinfo/cvsnt