Re: [AVFS] Problems with fork, Questions about avfs

[Ralf H. <ra...@bo...>]

Hi,

On 02/18/2005 11:11 AM, Miklos Szeredi wrote:
>>Do I understand you correctly that you want to test for real file in
>>lookup_segment before calling lookup_avfs? This could be a good
>>solution. For the example "/tmp/test#test/x" we have a valid ventry for
>>"/tmp/test" and now trying to lookup "#test". We need to get "#test"
>>into the ventry. With this ventry I could call av_file_open. I think the
>>result should be enough information, stat is not really needed. If it
>>works there is a local file and we know to ignore the magic. This also
>>works when testing for such special files in virtual files.
>>
>>On the other hand this wouldn't work for "test.tar.gz#ugz#something".
>>lookup_segment wouldn't find a valid file for "test.tar.gz#ugz" so it
>>would call lookup_avfs for #ugz.
> 
> 
> The really general solution would be to try appending the segments
> until a '/' is found (in which case it's virtual) or until one file
> did exist.  In fact to be perfectly correct, the testing should start
> from the whole path segement up to the slash, and if it doesn't exist
> go backwards removing #foo until either no more # is found or one file
> did exist.  Does this sound too difficult?

I already implemented the code I mentioned and it looks good. I still 
need some tests to be sure everything is okay especially for the undo 
step. But atleast I can access files like "test#" inside archives.

I will think about your idea to go back until an existing file is found,
it shouldn't be hard to add it to the code. Although I think it is
acceptable to not be able to enter archives with the magic char in the
filename, a general solution is much better.

Best Regards,

Ralf Hoffmann

-- 
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E-Mail: Ralf Hoffmann <ra...@bo...>
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