ivman auto-mounts DVD with non-existent uid (-1)

[Reuben Thomas]

Binary package hint: ivman

I have ivman installed with default settings. When I put a DVD in my drive, it is mounted with uid/gid -1, which means I can't access it. Further, the directory in question, /media/cdrom0, is not even executable by root.

The only thing I can find in the logs is:

Jun 4 14:56:28 canta NetworkManager: <debug> [1212587788.451836] nm_hal_device_added(): New device added (hal udi is '/org/freedesktop/Hal/devices/volume_label_DVD_VIDEO_RECORDER').

which looks OK.

I tried setting VERBOSE=yes in /etc/default/ivman and restarting ivman, but that didn't seem to produce any extra output, at least in /var/log/*.

ProblemType: Bug
Architecture: i386
Date: Wed Jun 4 14:58:21 2008
DistroRelease: Ubuntu 8.04
NonfreeKernelModules: ath_hal
Package: ivman 0.6.14-3ubuntu1
PackageArchitecture: i386
ProcEnviron:
 SHELL=/bin/bash
 PATH=/usr/local/sbin:/sbin:/usr/sbin:/usr/local/epocemx/bin:/home/username/bin:/home/username/local/i686/bin:/home/username/local/bin:/home/username/.luarocks/bin:/home/username/Work/Adsensus/svn/nancy/trunk:/home/username/Work/Adsensus/svn/adsensus/trunk:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=en_GB.UTF-8
SourcePackage: ivman
Uname: Linux 2.6.24-18-generic i686

[Reuben Thomas (rrt)]

The problem seems to have arisen because the device (/dev/scd0) was mentioned in /etc/fstab, which was written by the Ubuntu installer. So perhaps this is rather an installer bug? Or maybe it's not a bug but a potential problem which needs to be documented?

[Reuben Thomas (rrt)]

Once I removed the /dev/scd0 line from /etc/fstab, automounted DVDs now have the correct user/group (either ivman.plugdev if I run ivman system-wide, or my uid and gid if I run it with ivman-launch) but the DVD is still mounted without execute permission on the directory, so I can't actually enter the directory.

[Reuben Thomas (rrt)]

As far as I can tell the actual mounting is done by pmount-hal, so there are now two problems, neither of which is necessarily ivman's, but I'd appreciate guidance on how to proceed:

1. The Ubuntu installer writes an entry for a fixed cdrom drive in /etc/fstab. This seems to prevent disks in the drive later being mounted with the correct uid/gid.

2. pmount-hal seems by default to mount DVDs without the execute bit set on the mount point directory, so they can't be read.