linux-kernel - Re: [PATCH 1/3] fix setsid() for sub-namespace /sbin/init

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Message-ID: <20071126224649.GA393@tv-sign.ru>
Date:	Tue, 27 Nov 2007 01:46:49 +0300
From:	Oleg Nesterov <oleg@...sign.ru>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Pavel Emelyanov <xemul@...nvz.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] fix setsid() for sub-namespace /sbin/init

On 11/26, Eric W. Biederman wrote:
>
> Oleg Nesterov <oleg@...sign.ru> writes:
> 
> > This is different, perhaps we can keep this call. kernel_thread(kernel_init)
> > attaches /sbin/init to init_struct_pid. Nothing bad, and a "good" init should
> > do setsid() anyway. But who knows? Some special environment may expect that
> > getpgrp() != 0. Not that I really disagree on this issue though.
> 
> init starting with session == pgrp == 0 is historical linux behavior.  I consider
> the current 2.6 behavior a temporary aberation from the historical linux behavior.

Ah, OK.

> Plus once we do this the code will be easier to maintain because we have
> removed one obscure special case.

Yes indeed. So we can remove this special case code as soon as copy_process()
is changed.

Oleg.

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