Re: [PATCH 0/8] Rework KERN_

Andrew Morton
2012-06-05T23:58:11Z

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.