Re: Possible problem mounting Video DVD

Stuart T Rogers
2014-01-30T19:38:48Z

On 30/01/14 19:06, Dale R. Worley wrote:
>> From: Stuart T Rogers <stuart@stella-maris.org.uk>
>
>> OK let me explain, I am not issuing any mount commands myself. I place
>> the DVD in the drive and close it, wait until it appears in the device
>> notifier and select action Open in File Manager, when it opens having
>> been mounted by the system at run/media/stuart/DVD_RECORDER the response
>> from Dolphin is that the permissions wont allow me to open the root
>> directory of the drive for browsing. If I try to play the video using
>> Dragon etc again this works OK the permissions it is mounted with do not
>> stop that action.
>
> In regard to *playing* the videos, it's possible that the players
> don't mount the DVD as a file system at all, so the fact that they
> work isn't particularly informative.
>
> http://forums.fedoraforum.org/showthread.php?t=296874
>
> It looks like Skull One in that thread has the best explanation. I'm
> not familiar with the details of mounting DVDs, but he suggests that
> the directories /run/media/stuart/DVD_VIDEO_RECORDER and
> /run/media/stuart/LG_VDR *on your disk* may have different
> permissions, and those permissions leak into the permissions seen when
> a DVD is mounted there. So what are the permissions on those
> directories (when no DVD is mounted)?
>
> In any case, it's unlikely to be a problem that this mailing list
> deals with. We only handle the mount executable. One possibility is
> that the DVD mount and processing code in the kernel is providing
> unreasonable permission values (after all, it synthesizes them), in
> which case the fix is a kernel change. Another possibility is that
> adjusting the permissions of /run/media/stuart/DVD_VIDEO_RECORDER will
> make the problem go away, in which case it can reasonably be
> considered to be a configuration error. It's also possible that
> whatever is automounting the DVD isn't being smart enough about the
> permissions it is setting up for the DVD file system. That would be a
> problem for the a different mailing list.
>
> Dale
>

Dale

Thanks for that explanation. The only thing regarding the DVD_RECORDER
directory is that it does not exist until the DVD is mounted so whoever
creates it sets the permissions. The name DVD_RECORDER is the volume
name of the DVD. I'm not sure how the DVD can itself have permissions
attributed to it though.

I will attempt to discover the right place to progress this issue.