Our clients for Macintosh do use andx. They are handy for doing stuff like
doing an open followed by a read. We use these for accessing special
meta-data files for the Macintosh like Finder information stored in files on
the server. Unfortunately, Microsoft does not handle them properly for
stuff like write and close (does not work on NT).

--
Paul W. Nelson
VP. Engineering, Thursby Software Systems, Inc.
> From: "Michael B. Allen" <mballenEROLS.COM>
> Reply-To: Common Internet File System <CIFSDISCUSS.MICROSOFT.COM>
> Date: Wed, 7 Mar 2001 15:00:36 -0500
> To: CIFSDISCUSS.MICROSOFT.COM
> Subject: Re: are andx command used?
>
> On Wed, Mar 07, 2001 at 02:35:58PM -0500, Daniel J. Drake wrote:
>> With all of the described andx commands in the Cifs spec, I have to question
>> my sanity when the only and chain I have ever seen is session setup and tree
>> connect.  Has anyone ever seen a trace where additional andx chains are
>> used?  NT 3.51 didn't use any but session setup and tree connect.  I have
>> been going over netmon and tcp dump traces and have never , with the
>> aforementioned exception, seen an andx command chain.
>
> Generally true but I and I doubt you have enough data points to know
> for sure. If you're just looking at MS clients doing the day to day
> file ops you're not going to see anything interesting. But I'm sure
> there are clients that take advantage of it. Chaining is actually a
> nice feature(or you could think of it as compensation) but the problem
> with using it is that the client needs a certain clairvoyance as to
> what the client user wishes to do. If the client is providing a basic
> file API this clairvoyance may not be accessable. However I'm sure there
> are clients that provide specific functions that utilize chaining. For
> example you might have a function that checks to see if a file can be
> opened without a sharing violation(i.e. is it "locked"?). This might
> do open -> read 0 -> close. The *real* question is; how well do servers
> honor these requests?
>
> Mike
>
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