Re: Chroot bug

[Miloslav Semler]

Al Viro napsal(a):
> On Wed, Sep 26, 2007 at 03:11:33PM +0200, Miloslav Semler wrote:
>   
> > > As for the nested-chroot() bit, the root user inside of a chroot is 
> > > always allowed to chroot().  This is necessary for test-suites for 
> > > various distro installers, chroot once to enter the installer playpen, 
> > > installer chroots again to configure the test-installed-system.  Once 
> > > you allow a second chroot, you're back at the "can't reliably and 
> > > efficiently track directory sub-tree members" problem.
> > >
> > > So if you think it can and should be fixed, then PROVIDE THE CODE.
> > >       
> > Miloslav Semler
> >     
>
> man openat
>
> This is really pointless, anyway - any code that expects chroot to be
> root-proof is terminally broken.
>   
So thanks for information. I did't know anything about *at functions. So 
it seems to be more complicated. But maybe it will be good write to 
manpage "other systems implement it by other way, so this feature is 
unportable".
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