From mboxrd@z Thu Jan  1 00:00:00 1970
From: william <william@cobradevil.org>
Date: Tue, 26 Jul 2011 19:15:02 +0000
Subject: udev rule matching using ENV
Message-Id: <4E2F1236.8050500@cobradevil.org>
List-Id: <linux-hotplug.vger.kernel.org>
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To: linux-hotplug@vger.kernel.org

Dear list

i am trying to create a udev rule which executes a script whenever a usb=20
stick is removed with a particular uuid

The uuid is changeable and we have a common settings file which exports=20
the UUID from the usb partition.

What i would like is to import the UUID from the settings file and match=20
that with the actual ID_FS_UUID with the remove action.

So i created 99-remove-usb.rules with the following contents

IMPORT{program}=3D"/usr/local/bin/usb-stick-uuid.sh"
ACTION=3D"remove", ENV{ID_FS_UUID}=3D"ENV{MY_UUID}",=20
RUN+=3D"/usr/local/bin/usb-removed.sh"

The program usb-stick-uuid.sh now only echo's:
MY_UUID=FF744c66-3671-447c-8fa0-d96fc6f82352
and nothing else.
But it does never match.

When i enter the uuid by hand in the rule it does work:
ACTION=3D"remove",=20
ENV{ID_FS_UUID}=3D"ff744c66-3671-447c-8fa0-d96fc6f82352",=20
RUN+=3D"/usr/local/bin/usb-removed.sh"

Am i doing something wrong or is it just the way it works? I also could=20
not find any example on the internet matching two ENV strings.

My system:
ubuntu 10.10
udev version 162