Re: [PATCH] private mounts

[Eric Van Hensbergen <ericvh@gmail.com>]

On 4/26/05, Jamie Lokier <jamie@shareable.org> wrote:
> 
> It's called /proc/NNN/root.
> 
> So no new system calls are needed.  A daemon to hand out per-user
> namespaces (or any other policy) can be written using existing
> kernels, and those namespaces can be joined using chroot.
> 
> That's the theory anyway.  It's always possible I misread the code (as
> I don't use namespaces and don't have tools handy to try them).
> 

Should have checked myself before posting my previous reply -- but
this doesn't seem to work.  /proc/NNN/root is represented as a
symlink, but when you CLONE_NS and then try to look at another one of
your process' /proc/NNN/root the link doesn't seem to have a target
and you get permission denied on all accesses.  I haven't looked at
the underlying procfs code, but adapting procfs for this sort of
purpose feels wrong.

          -eric