linux-kernel - Re: [PATCH 0/8] Rework KERN

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Date:	Tue, 05 Jun 2012 16:52:25 -0700
From:	Joe Perches <joe@...ches.com>
To:	Kay Sievers <kay@...y.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-arm-kernel@...ts.infradead.org, linux-btrfs@...r.kernel.org,
	linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org,
	alsa-devel@...a-project.org
Subject: Re: [PATCH 0/8] Rework KERN_<LEVEL>

On Wed, 2012-06-06 at 01:48 +0200, Kay Sievers wrote:
> On Wed, Jun 6, 2012 at 1:43 AM, Joe Perches <joe@...ches.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.

If you use a "<n>" prefix for write to /dev/kmsg,
then it's supported just like before.

Otherwise, it's emitted at KERN_DEFAULT.

cheers, Joe

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