Re: udev problem with udevsettle

[Farkas Levente <lfarkas@lfarkas.org>]

Bryan Kadzban wrote:
> You shouldn't call cryptsetup from the udev RUN key.  From the udev(7)
> manpage:
> 
>> RUN
>>   <...> This can only be used for very short running tasks. Running an
>>   event process for a long period of time may block all further events
>>   for this or a dependent device. Long running tasks need to be
>>   immediately detached from the event process itself.
> 
> When your RUN rule is executed, udev is in the middle of processing the
> uevent for the USB storage device.  So while your script is running,
> udev has not settled (the test that udevsettle uses to decide this will
> never succeed, because the RUN rule that called udevsettle is not
> finished).  To get the rule to finish processing, the program that RUN
> ran needs to exit.  *Then* udevsettle will finish.

yes i see it, but anyway what does the "very short running tasks" means? 
  my scripts is about a second (under normal circumstances) which is 
imho very short from a shell script:-)

> It probably makes the most sense to just make your script run most of
> its logic in the background, instead of the foreground.  I'm not sure
> exactly what logic udevd uses, but I think it will work to write a
> wrapper script that just runs your current script in the background:

yes i already solve it, but imho it's not a good habit to call 
udevsettle from cryptsetup.

-- 
   Levente                               "Si vis pacem para bellum!"