/etc readonly

[Siggy Brentrup]

On Thu, Aug 06, 2009 at 12:38 +0200, Carl Friis-Hansen wrote:
> 
> On Thu, August 6, 2009 10:48, Siggy Brentrup wrote:
> > On Thu, Aug 06, 2009 at 10:30 +0200, Luca Ferrari wrote:
> >> Hi all,
> >
> >> a trivial question: when the system loads the / in read-only, how
> >> can the system keep updated the /etc/mtab file?
> >
> > I doesn't, there's still the mtab in kernel space that's
> > kept up to date.
> 
> The file /etc/mtab *is* writable by root.

Thanks for correcting me.  After all the kernel is free to ignore soft
ro settings.  Must have been an old *nix version that mislead me.
After rethinking the only version I'm sure about /etc/mtab not being
updated while / is mounted ro is Unix release 6 and that's really
ancient.

Thanks
  Siggy
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