linux-kernel - Re: Ordering hotplug scripts vs. udev device node creation

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Message-Id: <200610240645.44542.arvidjaar@mail.ru>
Date:	Tue, 24 Oct 2006 06:45:38 +0400
From:	Andrey Borzenkov <arvidjaar@...l.ru>
To:	linux-hotplug-devel@...ts.sourceforge.net
Cc:	"Aaron Cohen" <aaron@...onance.org>, linux-kernel@...r.kernel.org
Subject: Re: Ordering hotplug scripts vs. udev device node creation

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On Monday 23 October 2006 23:26, Aaron Cohen wrote:
> Adding a USB device seems to work correctly (more or less, my script
> is invoked a few too many times but I think I can figure out how to
> adjust my rule) using this.  I'm having trouble now with removal
> though.  By the time my script runs the device file has been removed
> by udev and I can't look it up through udevinfo any longer.  I need to
> know what the name of the device file was so I can tell gpsd to stop
> monitoring it.
>
> Any ideas?

udev sets DEVNAME and DEVLINKS environment before calling RUN program. You can 
either pass them directly like

RUN+="/your/program env{DEVNAME} env{DEVLINKS}"

or your program can get them from environment. It unfortunately seems to be 
not documented.

HTH

- -andrey
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