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Message-Id: <1227314536.29976.1.camel@bazbox>
Date:	Sat, 22 Nov 2008 00:42:16 +0000
From:	Matt Keenan <tank.en.mate@...il.com>
To:	Vegard Nossum <vegard.nossum@...il.com>
Cc:	linux-kernel@...r.kernel.org, Alan Cox <alan@...rguk.ukuu.org.uk>,
	Alexey Dobriyan <adobriyan@...il.com>
Subject: Re: [RFC][PATCH] sysrq-j: emergency shell

On Sat, 2008-11-22 at 00:51 +0100, Vegard Nossum wrote:
> >From 57adfe62983db316fceba1b64258fd3d8830bcd8 Mon Sep 17 00:00:00 2001
> From: Vegard Nossum <vegard.nossum@...il.com>
> Date: Sat, 22 Nov 2008 00:25:57 +0100
> Subject: [PATCH] sysrq-j: emergency shell
> 
> This patch adds support for "SysRq-j", which invokes an emergency
> root shell in the current console.
> 
> Please don't bite my head off for abusing the file API; documentation
> was rather sparse! (Corrections are welcome, though.)
> 
> It seems that keyboard input will go to the shell only half of the
> time; the other half goes to whatever program was running there in
> the first place. I tried to kill the other users of the TTY using
> TIOCSCTTY, but it seems not to have worked. Any ideas?
> 

Have you considered SIGTSTP?

Matt


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