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Re: [Libcdio-devel] Rock Ridge RRIP Deep Directory support

From: Rocky Bernstein
Subject: Re: [Libcdio-devel] Rock Ridge RRIP Deep Directory support
Date: Wed, 29 Apr 2020 20:28:47 -0400

On Wed, Apr 29, 2020 at 8:22 PM Pete Batard <address@hidden> wrote:

> Hi,
> I got an issue reported today from a user trying to use a Rock Ridge ISO
> with folders that go more than 8 levels, and it appears that the Rock
> Ridge extensions from libcdio do not support RRIP Deep Directories, as
> described on pages 33-34 of
> More specifically, if you master a Rock Ridge ISO with something like
> ./1/2/3/4/5/6/7/8/test.txt, because it goes deeper than 8 levels, the
> RRIP extensions enables '8/test.txt' to be moved into a top level
> ./rr_moved/ directory, with the '8/' subdirectory being replaced by a
> 0-byte file with the relevant System Use fields.
> An example of such an image can be found at:
> (374 KB).
> This image was generated with Folder2Iso
> (, which calls
> mkisofs behind the scenes, with Joliet extensions disabled to force Rock
> Ridge. Note that you can ignore '.efi/boot/bootx64.efi' from this image,
> as it is only there so I can test this image in Rufus.
> Obviously, libcdio should be able to recognize the RRIP extension and
> extract the deep directory content accordingly, but this doesn't appear
> to be the case.
> Specifically, the extract.exe sample will produce the following:
> # extract.exe rrip_deep_folder.iso tmp
> CD/DVD/BluRay CREATOR (C) 1993 E.YOUNGDALE (C) 1997 J
> System     : Win32
> Volume     : ISO Label
> Extracting: tmp/1/2/3/4/5/6/7/8
> Extracting: tmp/efi/boot/bootx64.efi
> Could not access /rr_moved
> Now, looking at section 4.1.5 of
> which
> describes support for deep directory, and the rock.c code, it seems
> there has been some attempt at adding some form support at least for the
> CL relocation field, but this currently sits behind a '#ifdef FINISHED'
> guard, and doesn't seem to be linked to active code.
> So I have to ask:
> What's the status of Deep Directory Rock Ridge support in libcdio?
> Is someone planning to work on/finalize it?

Not that I am aware of.

> Regards,
> /Pete

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