Re: Can I create a link to an inode?

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Russell Miller wrote:

On Fri, Aug 15, 2008 at 12:30 AM, Russell Miller <[email protected] <mailto:[email protected]>> wrote:


    On Fri, Aug 15, 2008 at 12:17 AM, Doug Wyatt <[email protected]
    <mailto:[email protected]>> wrote:

        Here's the situation - I have video file, currently open
        in Mplayer, which I accidentally deleted from its directory.

        So, the storage and inode still exist as long as I don't
        close the Mplayer.

        Does anyone know of a way, using available commands or via
        system calls in a program, to reestablish a link from a
        directory to the inode?



    You might try going into debugfs, finding the inode, and seeing if
    you can tell it it's not deleted anymore.  It's not actually deleted
    until all the references are closed, so I think it might be possible
    (I don't know the internal details of what happens when a file is
    deleted but not closed so I may be wrong).


Oh hey.  Look what I found.

http://dag.wieers.com/blog/undeleting-an-open-file-by-inode

Still risky but at least you won't be flying blind.

--Russell

Excellent!

Debugfs was exactly what I was looking for.  I already had the
inode number from lsof.  Going into debugfs and using 'ln' and
'set_inode_field' (for incrementing the link count) took care
of my problem.

I did download the source for 'fdlink', mentioned in a comment
on <dag.wieers.com>, and looked it over.  But I decided, for
this situation, debugfs was less likely to cause a problem.

Again, many thanks!

Doug

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