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How do I set GID/UID and mode bits assigned to the directory in /media, to which my USB drive is auto-mounted when I plug it in (i.e. to the directory, which represents the drive itself, e.g. /media/MyUSBDriveLabel)?

I'm trying to make an auto-mounted drive accessible by several users, belonging to the same group. Bu default I'm getting it accessible to the current user only:

$ ls -ld /media/MyUSBDriveLabel
drwx------ 18 user group 16384 1970-01-01 03:00 MyUSBDriveLabel

while I'd like to get something like

drwxrwx--- 18 user sharedgroup 16384 1970-01-01 03:00 MyUSBDriveLabel

Is it doable with Nautilus's auto-mount or should I use some other auto-mount solution?

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A very similar question has a udev-based answer. Try taking that solution, but replace the MODE setting with a USER and/or GROUP setting.

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Or maybe not. It seems that answer will let you control the owner of the device file, not the owner of the mounted filesystem. – Jean-Paul Calderone Aug 1 '11 at 16:46
The only other answer I've been able to find involves recompiling udisks-daemon (which is what actually does the mount on Ubuntu 10.10, as far as I can tell - not nautilus itself, despite nautilus having support for doing the mount itself). This isn't a very satisfying solution, though. – Jean-Paul Calderone Aug 1 '11 at 16:47
Nope, udev's RUN option is the way to go. One cane issue a mount command inside that option. See:… – con-f-use Aug 1 '11 at 16:50
Ooh. Following a link to… from… suggests that udev can control the mount options using something like ENV{mount_options}="$env{mount_options},utf8,gid=100,umask=002" which should actually affect the mounted filesystem in the usual way. – Jean-Paul Calderone Aug 1 '11 at 16:50
Or the arch way. That is untested though :D – con-f-use Aug 1 '11 at 16:52

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