linux-kernel - Re: sys_chroot+sys

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Message-ID: <46F2B59F.8090709@davidnewall.com>
Date:	Fri, 21 Sep 2007 03:32:07 +0930
From:	David Newall <david@...idnewall.com>
To:	Philipp Marek <philipp@...ek.priv.at>
CC:	7eggert@....de, Alan Cox <alan@...rguk.ukuu.org.uk>,
	Bill Davidsen <davidsen@....com>, majkls <majkls@...pere.com>,
	bunk@...tum.de, linux-kernel@...r.kernel.org
Subject: Re: sys_chroot+sys_fchdir Fix

Philipp Marek wrote:
> AFAIK pivot_root() changes the / mapping for *all* processes, no?
>   

The manual page is confusing.  It even admits to being "intentionally 
vague".  However the goal seems clear:

    "pivot_root() moves the root file system of the current process to
    the directory put_old and makes new_root the new root file system of
    the current process"
    -- man 2 pivot_root

There's an argument that pivot_root could be improved...
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