My brain hurts. (Messing with mount.)

[Rob Landley]

On Tuesday 07 March 2006 1:38 am, Denis Vlasenko wrote:
> On Monday 06 March 2006 21:55, Rob Landley wrote:
> > On Monday 06 March 2006 3:31 am, Denis Vlasenko wrote:
> > > > It is possible to --bind mount a directory onto itself.  (Oddly, the
> > > > system survived.  It seems to be a NOP, I could still list the
> > > > contents of the directory, but it shows up in /proc/mounts.)
> > >
> > > With upcoming kernel support, this will allow making subrees RO
> > > (or noatime, noexec etc) if you use corresponding mount option.
> >
> > Ah.  Cool.
> >
> > Mount's always handled "mount blockdev directory" and my version handles
> > "mount file directory" with an automatic losetup behind the scenes.  I'm
> > pondering making the "mount directory directory" do an automatic --bind
> > mount.
>
> What will "mount file file" do? Will it also do a --bind mount?

It'll complain that the target isn't a directory.

For _any_ mount to make sense, the target must be a directory.  That's part of 
the definition of mount, everything gets mounted on a directory.

I need to add a test to the test suite for that, though...

Rob
-- 
Never bet against the cheap plastic solution.