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Message-ID: <46F2DDD0.3030500@tmr.com> Date: Thu, 20 Sep 2007 16:53:36 -0400 From: Bill Davidsen <davidsen@....com> To: David Newall <david@...idnewall.com> CC: Philipp Marek <philipp@...ek.priv.at>, 7eggert@....de, Alan Cox <alan@...rguk.ukuu.org.uk>, majkls <majkls@...pere.com>, bunk@...tum.de, linux-kernel@...r.kernel.org Subject: Re: sys_chroot+sys_fchdir Fix David Newall wrote: > 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... > And very little argument that the man page could be improved, perhaps. However, there is no question that pivot_root is intended to have breadth for more than one process. Keeping this functionality sounds a little like putting a bow tie and tux on your bug and calling it a "feature." Not all bugs are useless for legitimate purposes, but it doesn't make them safe. It appears to be a sort-of way to get per-process bind mounts. -- bill davidsen <davidsen@....com> CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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