Re: Mirror a file system on the fly

[Dave Schwartz <decebel@gmail.com>]

Hi Ram,
Thanks for the inputs. I was going over the man pages describing the
clone system call and its option of CLONE_NEWNS. Could understand the
description only in parts.

The man page suggests that this flag when set, the cloned child is
started in a new name space, initialized with a copy of the parent.
Now does that mean, a program like a shell when cloned with
CLONE_NEWNS set, will have a copy of file hierarchy of the underlying
parent process?

Gracias,
decebel

  

On 8/19/05, Ram Pai <linuxram@us.ibm.com> wrote:
> On Thu, 2005-08-18 at 12:40, Dave Schwartz wrote:
> > Hi list,
> >
> > Not too sure if this is the right forum to ask this question but since
> > my requirement is around linux filesystems, I shall take this liberty
> > to post my question.
> >
> > My requirement is to develop a kernel/user space module to add an
> > extension to the shell program environment such that this shell forks
> > a mirror look-alike filesystem of the underlying OS to the programs
> > run in that particular shell.
> 
> u seem to be talking about namespaces, if I get you right.
> 
> there is a flag CLONE_NEWNS to the system call 'clone' which does what
> u r talking about.
> 
> RP
> 
> 
> 
> 
> >
> >
> > Was trying to look thru the FAQ and a few list archives to look for
> > ideas around my requirement. The archives were overwhelming.
> >
> >
> > Any ideas/pointers will be a great help,
> > Gracias,
> > decebel
> > -
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>