linux-kernel - Re: [PATCH] ptrace: it is fun to strace /sbin/init

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Date:	Tue, 25 Mar 2008 15:16:13 +0100
From:	Krzysztof Halasa <khc@...waw.pl>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Oleg Nesterov <oleg@...sign.ru>, ebiederm@...ssion.com,
	xemul@...nvz.org, pavel@....cz, sds@...ho.nsa.gov,
	roland@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ptrace: it is fun to strace /sbin/init

Andi Kleen <andi@...stfloor.org> writes:

> It would be fine to allow this unconditionally if there was some mechanism
> to make sure someone else takes over reaping childs while init is
> ptraced.

Well, I think it isn't even necessary, unless you ptrace init for a
long time. I would simply go with the simple 1-line patch.

> I like the general idea -- i used to patch kernels to allow this too,
> but it is dangerous.

Though root-only. Root doesn't want to be limited and knows better
anyway. I think ptracing init is useful even when no one takes care
of the dead (especially if you want to trace waits).
-- 
Krzysztof Halasa
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