Date: Mon, 2 Jun 2008 10:20:33 +0100
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: David Newall <davidn@davidnewall.com>
Cc: Willy Tarreau <w@1wt.eu>, Harald Dunkel <harald.dunkel@t-online.de>,
       Joe Peterson <joe@skyrush.com>, linux-kernel@vger.kernel.org,
       Alan Cox <alan@redhat.com>
Subject: Re: 2.6.25.3: su gets stuck for root
Message-ID: <20080602102033.63e4cd18@core>
In-Reply-To: <4843B6EE.8080104@davidnewall.com>
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	<4843B6EE.8080104@davidnewall.com>
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On Mon, 02 Jun 2008 18:31:34 +0930
David Newall <davidn@davidnewall.com> wrote:

> Alan Cox wrote:
> > Not really. The task would get suspended if it attempted to change the
> > tty settings while not being session leader. This is part of the POSIX
> > and BSD job control.
> 
> I haven't heard about this new restriction, but it begs the observation
> that stty, when forked from a shell (the usual case), is never a session
> leader.

Sorry I mean part of the current session. I was thinking about the
specific case of bash or the ssh->bash setup where the question would be
whether the shell was session leader.

Someone who can dup this needs to instrument it in tty_ioctl really.

Alan
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