Re: [PATCH] Allow sysrq() via /proc/sys/kernel/magickey

From: Dave Jones
Date: Fri Sep 19 2003 - 08:11:20 EST


On Mon, Aug 25, 2003 at 07:42:57PM +0000, Linux Kernel wrote:
> ChangeSet 1.1114, 2003/08/25 16:42:57-03:00, m.c.p@xxxxxxxxxxxxxxx
>
> [PATCH] Allow sysrq() via /proc/sys/kernel/magickey
>
> Hi Marcelo,
>
> sysrq() is a good thing to debug things, but unfortunately you need to have
> physical access to the keyboard. My company for instance maintains tons of
> remote machines and sometimes we need to do sysrq() too, but it's not
> possible to do so the remote way.
>
> Attached patch enables emulation of the Magic SysRq key (Alt-SysRq-key) via
> the /proc interface. Just echo the desired character into the file and there
> you go.
>
> Patch from Randy Dunlap!
>
> It's in -wolk for a long time and also in some other kernel tree forks.
> 2.5/2.6 has almost the same (/proc/sysrq-trigger)

So why not make this compatible with existing behaviour, and use the
same name ? Seems this is deviating between 2.4 / 2.6 for no good reason.

Dave

--
Dave Jones http://www.codemonkey.org.uk
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