Re: udev remove ATTR(S) not working

[Farkas Levente <lfarkas@bppiac.hu>]

Andrey Borzenkov wrote:
>> On 6/7/07, Farkas Levente <lfarkas@bppiac.hu> wrote:
>>> hi,
>>> how can i write a RUN udev rules for remove event? i want to recognize
>>> my usd pendrive's add and remove. the add is simple since i can use
>>> rather specific rules like:
>>> ---------------------------------------
>>> ACTION="add", SUBSYSTEM="block", ATTR{size}="2880",
>>> ATTRS{serial}="07530736300A", ATTRS{product}="USB DISK Pro",
>>> RUN+="/xxx" ---------------------------------------
>>> but the remove rule is much complicated, since (at least it seems for
>>> me) udev don't send ATTR(S) in this case and don't know about anymore
>>> the removed device parameters.
> 
> If you absolutely need them on remove (could you explain why? What exactly are 
> you trying to do?), set environment vars on add and use (match) them on 
> remove. 

ok so what i really need to somehow properly identify my pen drive. my
home partition is luks encrypted and the key on on my pen drive. when i
pug in the pen, udev recognize it and mount (after luksopen) the
encrypted volue as /home/lfarkas. when i finish my work, simple logout
and remove the pen. udev recognize the remove and umount (and luksclose)
the volume. what i want to avoid to confuse my pen with other usb device
eg. camera, pda and other pen device.

ps. anyway this has been working for years, but now as i upgrade to
fedora 7 and have to rewrite the rules (because of the SYSFS<->ATTR
changes) i'd also like to polish my scripts.

-- 
  Levente                               "Si vis pacem para bellum!"

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