[H-GEN] /dev/log inside a chroot

[Martin Pool]

On Wed, Aug 23, 2000 at 04:44:24PM +1000, Bruce Campbell wrote:

> Rather than having '/chroot' be a seperate filesystem and also, a seperate
> copy of files in /bin, /lib etc, you can have /chroot be the same
> filesystem as '/' , and then hardlink each directory/file in /chroot/bin
> to /bin, and so forth for /lib etc.
> 
> 	ie:
> 
> 		/chroot/bin/ls ->(hard, not symbolic)-> /bin/ls
> 	or
> 		/chroot/bin/ -> /bin/	( one link )
> 
> This saves duplication of diskspace for system utilities.  The downside is
> that to save space (say by repeating for /usr), you must do your base
> install on the one filesystem, thus having a large '/' footprint.

Of course one drawback is that then the filesystem can't be mounted
r/o.

Interestingly, Linux 2.4 will probably support many-to-many devices
and mount points.  So you can do 

  mount -o ro /dev/sda4 /jail1/usr
  mount -o ro /dev/sda4 /jail2/usr

This may not actually ship, though -- watch Kernel Traffic for more
news.

-- 
Martin Pool, Linuxcare, Inc.
+61 2 6262 8990
mbp at linuxcare.com, http://www.linuxcare.com/
Linuxcare. Support for the revolution.
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