Date: Mon, 20 Jan 2003 23:36:06 +0300
From: "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>
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In-reply-to: <3E2C5FEF.E9AC8D1C@phekda.freeserve.co.uk> (message from Richard
	Dawe on Mon, 20 Jan 2003 20:45:35 +0000)
Subject: Re: fstat, fd_props and inventing inodes [PATCH]
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> Date: Mon, 20 Jan 2003 20:45:35 +0000
> From: Richard Dawe <rich AT phekda DOT freeserve DOT co DOT uk>
> 
> I tried to think of reasons why _truename was preferred over _fixpath.

I don't remember; perhaps the archives of this list will help.

> AFAICS
> _truename handles subst'd/assign'd/join'd drives, but _fixpath doesn't. That
> seems like a good reason for keeping _truename and handling UNCs specially.

Yes, I agree.

> How do you think we should handle UNCs?
> 
> Should we just ignore UNCs?
> 
> Or should we scan through the list of shares that we have mapped, to determine
> the drive letter?

The latter, IMHO.  Ignoring is no good, since it will break `fstat'
for remote files.

> (I was assuming that _truename would return the drive letter
> for a UNC with a mapped drive.)

I think `_truename' cannot do that because that would slow it down: to
do the job, you need to loop through 32 possible drives, making a
system call for each one of them.

So perhaps we should only do that lazily, and/or maybe make the st_dev
member be one of the expensive ones which is only computed if a
corresponding bit in `_djstat_flags' is cleared.