From mboxrd@z Thu Jan  1 00:00:00 1970
From: Rainer Dorsch <rdorsch@web.de>
Date: Sun, 02 Jan 2005 13:30:37 +0000
Subject: Re: hotplug and test and set
Message-Id: <200501021430.37319.rdorsch@web.de>
List-Id: <linux-hotplug.vger.kernel.org>
References: <200501020003.46376.rdorsch@web.de>
In-Reply-To: <200501020003.46376.rdorsch@web.de>
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To: linux-hotplug@vger.kernel.org

Am Sonntag, 2. Januar 2005 02:27 schrieb Marco d'Itri:
> On Jan 02, Rainer Dorsch <rdorsch@web.de> wrote:
> > My problem is that this script is called four times when the dongle is
> > plugged in. I order to avoid to call pand four times, I added a poor test
> > and set to the script to add a lock when a pand is running. Does anybody
> > know, what I could do to get a better locking behaviour, e.g. an atomic
> > test and set?
> >
> >From http://linux-hotplug.sourceforge.net/?selected=usb:
>
> There are two kinds of usb hotplug event: device, and interface. Kernel
> 2.6 added device events, as well as reporting the complete set of
> interface events. You can tell which kind of event by the environment
> variables: device events don't include PRODUCT, or any of the other
> parameters here except DEVPATH and ACTION.
>
> So:
>
> # ignore device events
> [ "$PRODUCT" ] || exit 0

Many thanks for the quick reply.

I added

(date
echo $DEVPATH
echo $PRODUCT
echo $TYPE
echo $ACTION) >> /tmp/epox.log

into the script.

The result is

Sun Jan  2 14:06:32 CET 2005
/devices/pci0000:00/0000:00:07.2/usb1/1-2


add
Sun Jan  2 14:06:32 CET 2005
/devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2:1.0
a12/1/525
224/1/1
add
entered locked area
Sun Jan  2 14:06:32 CET 2005
/devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2:1.1
a12/1/525
224/1/1
add
Sun Jan  2 14:06:32 CET 2005
/devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2:1.2
a12/1/525
224/1/1
add


That means that I should scan for a DEVPATH variable ending with 1.0 (?)

Many thanks,
Rainer

-- 
Rainer Dorsch
Alzentalstr. 28
D-71083 Herrenberg
07032-919495
Icq: 32550367


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