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. 

how can i do so?
eg i create a new link SYMLINK+="lfarkas" in the add action
and in this case in remove actions env contains
DEVLINKS='/dev/lfarkas /dev/...'
BUT a rule like this:
ACTION="remove", SUBSYSTEM="block", ENV{DEVLINKS}="/dev/lfarkas*"
never match, while a rule like this
ACTION="remove", SUBSYSTEM="block", DEVLINKS="/dev/lfarkas*",
match for all block device.
so how can i match for DEVLINKS?
or what other methods exists for properly identify a removed device?
thanks in advance.

-- 
  Levente                               "Si vis pacem para bellum!"

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