External NTFS drive permissions

[nikogawa]

I used to share some folders on my NTFS external hard drive through samba in Jaunty. Since I upgraded to Karmic, these shares no longer work.

It seems that the permissions for this drive are only set for myself (no permissions for group or others) and I can not change these permissions (not with chmod or with nautilus, they keep jumping back).

I would like to have the same permissions on my external drives as in jaunty (owned by root and writable, executable by everyone). Since I use several drives I would like to avoid using /etc/fstab.

I tried adding the key mount_options with [umask=000] in system/storage/default_options/ntfs . But this doesn't seem to work in Karmic.

Where can I change the permissions on these automatically mounted devices.

Thank you,
Niko

[nikogawa]

It seems that these mount options are hard-coded in devicekit-disks.

However I have found a dirty hack which seems to work for me. I made the following script for my two external hard drives. It first unmounts the drives, and then mounts them again with dmask=000 as mount option.

#!/bin/bash

devkit-disks --unmount /dev/disk/by-uuid/BEDC44F4DC44A90B
devkit-disks --unmount /dev/disk/by-uuid/0D3594370C618A2A

devkit-disks --mount-options "dmask=000" --mount /dev/disk/by-uuid/BEDC44F4DC44A90B
devkit-disks --mount-options "dmask=000" --mount /dev/disk/by-uuid/0D3594370C618A2A

I am still looking for a solution to change the default mount options.

[da3rX]

I am having the exact same problem. Is there a better solution to this?

[holtz]

I have the exact same problem as well. I'm going to file a bug.

We can't continue to have bugs like this in newly released versions if we want to get wider adoption of Ubuntu. Do developers consider the affect that changing something like a mechanism will have for users?

Worse, nowhere can I find any information on how to change the default permissions for mounted USB drives. Googling turns up any number of possiblities: HAL, UDEV, fstab, automount, gconf. Which one does Ubuntu use? I have no idea. I really shouldn't have to know. There are megabytes of help files but no where can I find the information I need.

[holtz]

https://bugs.launchpad.net/ubuntu/+s...ev/+bug/482501

[dunskii]

just wondering if there has been any updates to this problem yet..?
Cheers
D

[merindol]

#!/bin/bash
devkit-disks --unmount /dev/disk/by-uuid/BEDC44F4DC44A90B

On Ubuntu Lucid (10.4) the devkit-disks command has been replaced by /usr/bin/udisks

[speedbacon]

Thanks for this information!

[danroy]

Download the sources via apt-get

mkdir udisks
cd udisks
apt-get source udisks

Modify src/device.c

cd udisks-1.0.1+git20100614
gedit src/device.c

Line 5878: Change default dmask and fmask to whatever you desire:

/* ---------------------- ntfs -------------------- */
/* this is assuming that ntfs-3g is used */

static const char *ntfs_defaults[] = { "uid=", "gid=", "dmask=0000", /*"fmask=0111",*/ NULL };
static const char *ntfs_allow[] = { "umask=", "dmask=", "fmask=", NULL };

Build and install

sudo apt-get build-dep udisks
debuild
cd ..
sudo dpkg -i udisks_1.0.1+git20100614*.deb

To go back

apt-get install --reinstall udisks