From owner-freebsd-stable@FreeBSD.ORG  Fri Jun 15 17:21:03 2012
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.freebsd.org (unknown [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 83361106582E
	for <freebsd-stable@freebsd.org>; Fri, 15 Jun 2012 17:21:03 +0000 (UTC)
	(envelope-from wblock@wonkity.com)
Received: from wonkity.com (wonkity.com [67.158.26.137])
	by mx1.freebsd.org (Postfix) with ESMTP id 3FD168FC19
	for <freebsd-stable@freebsd.org>; Fri, 15 Jun 2012 17:21:03 +0000 (UTC)
Received: from wonkity.com (localhost [127.0.0.1])
	by wonkity.com (8.14.5/8.14.5) with ESMTP id q5FHL2mr027488;
	Fri, 15 Jun 2012 11:21:02 -0600 (MDT)
	(envelope-from wblock@wonkity.com)
Received: from localhost (wblock@localhost)
	by wonkity.com (8.14.5/8.14.5/Submit) with ESMTP id q5FHL29S027485;
	Fri, 15 Jun 2012 11:21:02 -0600 (MDT)
	(envelope-from wblock@wonkity.com)
Date: Fri, 15 Jun 2012 11:21:02 -0600 (MDT)
From: Warren Block <wblock@wonkity.com>
To: Oliver Fromme <olli@lurza.secnetix.de>
In-Reply-To: <201206151433.q5FEXJC6073094@lurza.secnetix.de>
Message-ID: <alpine.BSF.2.00.1206151053360.26334@wonkity.com>
References: <201206151433.q5FEXJC6073094@lurza.secnetix.de>
User-Agent: Alpine 2.00 (BSF 1167 2008-08-23)
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7
	(wonkity.com [127.0.0.1]); Fri, 15 Jun 2012 11:21:02 -0600 (MDT)
Cc: freebsd-stable@freebsd.org
Subject: Re: devd problem with 9-stable
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 15 Jun 2012 17:21:03 -0000

On Fri, 15 Jun 2012, Oliver Fromme wrote:

> Warren Block wrote:
> > [...]
> > > > > > attach 50 {
> > [...]
> >
> > Even with those changes, devd is not triggering on my scanner attach:
> >
> >          match "subsystem" "DEVICE";
> >          match "type" "ATTACH";
> >          match "cdev" "ugen[0-9]+.[0-9]+";
> >          match "vendor" "0x04b8";
> >          match "product" "0x010a";
> >          action "echo HERE! $cdev > /tmp/zoot";
>
> Have you tried to put those lines inside a "notify" block
> instead of an "attach" block?  The documentation is not
> very clear about the difference between an "attach" block
> an a "notify" block with $type=ATTACH, but it probably
> wouldn't hurt to try both.

Well, it did work with an attach event.  Progress: the event is seen 
with a notify event.  However, something is not right with the execution 
of backticks in the action string:

notify 20 {
         match "subsystem" "DEVICE";
         match "type" "ATTACH";
         match "cdev" "ugen[0-9]+.[0-9]+";
         match "vendor" "0x04b8";
         match "product" "0x010a";
         action "devnum=`echo $cdev | sed -e 's/^ugen//'` && \
                 echo $devnum > /tmp/example && \
                 echo $cdev >> /tmp/example";
};

When the event is seen:
Executing 'devnum=`echo ugen0.6 | sed -e 's/^ugen//'` && echo devnum:  > /tmp/example && echo cdev: ugen0.6 >> /tmp/example'

$devnum never gets a value, the contents of /tmp/example are:
   devnum:
   cdev: ugen0.6

Trying $() instead of backticks makes it worse:
Executing 'devnum=$(echo $cdev | sed -e 's/^ugen//') && echo devnum: $devnum > /tmp/example && echo cdev: $cdev >> /tmp/example'

/tmp/example is then:
   devnum:
   cdev: