Re: permissions with udev/pmount?

[Nicolas de Sereville <deserevi@ieec.uab.es>]

Hi,

H. S. wrote:

> Apparently, _Nicolas de Sereville_, on 24/12/04 05:13,typed:
>
> > Hi list,
> >
> > I have the following problem using debian sid (kernel 2.6.8-1). I am 
> > trying to get an icon automatically when I plug in my usb stick or 
> > camera. I use udev / hal / gnome-volume-manager. As a normal user the 
> > links in /dev are created following the udev rules file, but the 
> > device is not mounted (pmount problem?) and hence doesn't appear on 
> > my desktop.
> >
> > Starting a X session as root, everything is working correctly. My usb 
> > stick and camera are detected, mounted and a nice icon appears on the 
> > desktop.
> >
> > So I guess I have a problem of permissions or groups for a normal 
> > user but I cannot figure out what? Following a few recent threads 
> > concerning this topic in the archives I made me member of the 
> > "plugdev" and "hal" (necessary?) group, and the device node in /dev 
> > are created in the "hal" group.
> >
> > Any help will be very apreciated!
> > Nico
> >
> >
> > A few technical information:
> > 1- udev rules for my usb stick:
> >    BUS="usb", KERNEL="sd*", SYSFS{product}="USB Mass Storage Device", 
> > NAME="gyp-cl-%k", SYMLINK="gyp-cl-usb%n", MODE="0660", GROUP="hal"
> >
> > 2- /etc/fstab information:
> >    /dev/gyp-cl-usb /media/stick    auto    rw,user,noauto,sync     
> > 0       0
>
>
> I was having a similar problem and filed a bug report (I was using 
> Sarge and kernel 2.6.9). You can find the complete bug reports on 
> http://www.debian.org/Bugs/ by find a bug with the number 286579.
>
> In Sid, using kernel 2.6.9 (2.6.9-1-686-smp to be more precise), I can 
> see the icon when I insert a USB stick in Inspiron 5160 Dell laptop. I 
> would suggest try this new version of the kernel.

I installed the kernel 2.6.9 through "apt-get install 
kernel-image-2.6.9-1-k7", but nothing is changing. When I plug in my 
stick and camera, the devices nodes are created in /dev but the devices 
are not mounted, neither as a user nor as root (which used to work a few 
days ago!). I don't remember having changed anything apart from 
upgrading the system.

The versions of some packages are given here:
ii  dbus-1         0.22-3         simple interprocess messaging system
ii  udev           0.050-2        /dev/ management daemon
ii  hotplug        0.0.20040329-1 Linux Hotplug Scripts
ii  hal            0.4.2-5        Hardware Abstraction Layer
ii  gnome-volume-m 1.1.2-5        GNOME daemon to auto-mount and manage 
media

Reading the man pages of pmount it seems that a few conditions should be 
verified, which I think is the case:
The mount will succeed if all of the following conditions are met:

- <device> is a block device in /dev/
- <device> is not handled by /etc/fstab (if it is, pmount calls
 '/bin/mount <device>' to handle this transparently; supplying a label 
is not
 allowed in this case)
- <device> is not already mounted according to /etc/mtab and /proc/mounts
- if the mount point already exists, there is no device already mounted 
at it
 and the directory is empty
- <device> is removable (i. e. on USB or FireWire bus, or
 /sys/block/drive/removable == 1)
- <device> is not locked (see below)

However when I use pmount in a terminal as a normal user ("pmount"), it 
tells me:
zsh: permission denied: pmount.

Can someone having udev/hal/hotplug/gnome-volume-manager running check 
the permission of the pmount file. I have:
-rwSr--r--  1 root plugdev 22K 2004-12-16 19:24 /usr/bin/pmount

I tried to make executable this file for everybody and then I can pmount 
manually the device (pmount /dev/gyp-cl-usb /stick) but it doesn't work 
automatically when I insert my stick.

Well as you can see I am stuck, so any ideas are welcomed!
Nico