[SOLVED] Mounting USB-storage devices using udev-rules

markush · 10-11-2012, 08:27 AM

Hello,

I've created an udev-rule

Code:

SUBSYSTEMS=="usb", KERNEL=="sd?1", SYMLINK+="usbstick", RUN+="/usr/local/bin/mount-usb.sh

which executes the following script:

Code:

#!/bin/bash

# USB-Stick mounten
device=`dmesg | tail -n 15 | grep -e sd.: | sed -n 's/.*sd.:\s\+\?\(.*\)/\1/i p'`
name=`dmesg | tail -n 15 | grep -i product: | sed -n 's/.*product:\s\+\(.*\)/\1/i p' | sed -n 's/\ /_/g p'`


if [ ! -d /media/$name ]; then 
      mkdir /media/$name
fi
mount /dev/$device /media/$name

notify-send "USB-Speicherstick eingehängt auf /media/$name"

but the "notify-send" command only works when I execute the script manually as root. Why?

Also it seems that the script is too complicated. Is there another way to get the name of the device-node and the product-name of the device?

I want to unmount the device as a normal user. How can I do this?

Also I want to delete the directory in /media after unmounting the device, how can I do this? I consider to write a script which cleans /media when the system starts.
How did you solve this issues?

BTW: I don't use KDE or XFCE.

Markus

Didier Spaier · 10-11-2012, 12:08 PM

Quote:

Originally Posted by markush

Also it seems that the script is too complicated. Is there another way to get the name of the device-node and the product-name of the device?

lsusb or usb-devices

markush · 10-11-2012, 12:20 PM

Quote:

Originally Posted by Didier Spaier

lsusb or usb-devices

Yes, I know this commands, but they don't show the devicenode.

Markus

guanx · 10-11-2012, 12:45 PM

Did you try "/dev/bus/usb/${BUSNUM}/${DEVNUM}"? Or simply use "set" to list all environment variables in your script to see which you'd like to use.

markush · 10-11-2012, 12:59 PM

Well, thanks for the answers, maybe I'm missing something. But the only place where I can see the path for the lastest connected USB-device is the output of dmesg.
I could compare the output of df and "ls /dev/sd*", this would show me which sd?? isn't yet mounted.

I found out that the "notify-send" command only works together with dbus. Now I'll try to find out how this works.

Markus

markush · 10-11-2012, 01:35 PM

I've changed the script,

Code:

#!/bin/bash

# USB-Stick mounten
sleep 5                                                                           
device=`dmesg | grep -e sd.: | tail -n 1 | sed -n 's/.*sd.:\s\+\?\(.*\)/\1/i p'`  
name=`dmesg | grep -i product: | tail -n 1 | sed -n 's/.*product:\s\+\(.*\)/\1/i p' | sed -n 's/\ /_/g p'`                                                          
                                                                                  
                                                                                  
if [ ! -d /media/$name ]; then                                                    
      mkdir /media/$name                                
fi                                                                                
mount /dev/$device /media/$name                                                   
                                                                   
notify-send "USB-Speicherstick eingehängt auf /media/$name"

I've swaped the tail and grep commands. It works properly now.

As of "notify-send", when I do as root on the commandline "export $(dbus-launch)" and afterwards execute the script manually, the notification works. Unfortunately there seems to be no manpage for dbus, so I couldn't find out how to get this working.

Markus

T3slider · 10-11-2012, 06:25 PM

I think the proper way to get the device name/information is to pass them as arguments in the udev rule. See `man udev` for some possible variables (eg. %k). I'm no udev expert and I don't have time right now to check what the proper arguments should be, but doing a

Code:

grep RUN /lib/udev/rules.d/*

should give you some examples of how it is done for other devices.