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Date: Sun, 26 Oct 2003 13:10:52 -0500
From: Christopher Faylor <cgf-rcm AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: 1.5.1: can't open files beginning with "..."
Message-ID: <20031026181052.GE28125@redhat.com>
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References: <20031025221849 DOT GQ1653 AT cygbert DOT vinschen DOT de> <21365 DOT 1067156301 AT www3 DOT gmx DOT net>
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On Sun, Oct 26, 2003 at 09:18:21AM +0100, Pavel Tsekov wrote:
>> > Does it fix the following:
>> > 
>> > Administrator AT mordor ~
>> > $ cd /usr/bin../
>> 
>> No, it fixes the more than two leading dots problem.  The above is
>> a genuin windows problem as you noted in your previous mail.  I don't
>> know how to fix this without noticeably slowing down the path conv
>> routine.
>
>I'll try to send my patch for reviewal to cygwin-patches tonight. I have
>used it
>for a while and haven't noticed any perforamance hits.
>
>It works like this:
>
>1) Count the number of dots for each path component
>
>2) Check if the path component consists solely from dots
>
>      If it does return ENOENT if the count of the dots is
>       greater than 2.

Why would we go to this effort, though?  If the underlying FS gives meaning
to a file named '...................' why should we add overhead to cygwin
to stop it?  The path handling code is already slow enough without adding
checks for corner cases.

On the other hand, this *is* something that managed mode should deal with
correctly.

cgf

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