From mboxrd@z Thu Jan  1 00:00:00 1970
From: akpm@linux-foundation.org (Andrew Morton)
Date: Tue, 5 Jun 2012 16:58:08 -0700
Subject: [PATCH 0/8] Rework KERN_<LEVEL>
In-Reply-To: <1338940345.11962.9.camel@joe2Laptop>
References: <cover.1338889066.git.joe@perches.com>
 <20120605142826.d92316a0.akpm@linux-foundation.org>
 <1338934303.5780.8.camel@joe2Laptop>
 <20120605151754.a794ac7c.akpm@linux-foundation.org>
 <1338936572.5780.29.camel@joe2Laptop>
 <20120605162910.caccb0d4.akpm@linux-foundation.org>
 <1338939316.11962.3.camel@joe2Laptop>
 <CAPXgP13J+8-dPpZkSfh9sM3xXujC2Rb9tJaOvGoEPghgdr8jiw@mail.gmail.com>
 <1338939792.11962.4.camel@joe2Laptop>
 <CAPXgP10DEsqtz9xbPUQ3xCwdFGTTYyTGSd7yEcU2vUr3SJ83Sw@mail.gmail.com>
 <1338940345.11962.9.camel@joe2Laptop>
Message-ID: <20120605165808.cd255b93.akpm@linux-foundation.org>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Tue, 05 Jun 2012 16:52:25 -0700
Joe Perches <joe@perches.com> wrote:

> On Wed, 2012-06-06 at 01:48 +0200, Kay Sievers wrote:
> > On Wed, Jun 6, 2012 at 1:43 AM, Joe Perches <joe@perches.com> wrote:
> > > On Wed, 2012-06-06 at 01:39 +0200, Kay Sievers wrote:
> > 
> > >> > # echo "\001Hello Andrew" > /dev/kmsg
> > >> > /dev/kmsg has
> > >> > 12,774,2462339252;\001Hello Andrew
> > >>
> > >> Try "echo -e"? The stuff is copied verbatim otherwise.
> > >
> > > # echo -e "\001Hello Kay" > /dev/kmsg
> > > gives
> > > 12,776,3046752764;\x01Hello Kay
> > 
> > Don't you need two bytes to trigger the logic?
> 
> Yes.  Angle brackets fore and aft.

he means

	echo "\0014Hello Joe" > /dev/kmsg
	          ^

It needs one of [0-7cd] to trigger the prefix handling.