Re: Symlink indirection

John Bradford (john@bradfords.org.uk)
Sat, 14 Dec 2002 13:55:37 +0000 (GMT)


> > I don't understand what you are trying to explain. Do you mean a
> > union mount, or a variation thereof?
> >
> > I thought Al Viro was going to do union mount support for 2.5, but
> > I haven't heard about it in a while. Maybe it went in and no one noticed?

> I'm not familiar with the phrase 'union mount' and although google gives
> wads of hits, I can't find a good description of it
>
> What I mean is (contrived example with made-up mount option --overlay)

> mkdir a
> echo "a/x" > a/x
> echo "a/y" > a/y
> echo "a/z" > a/z
>
> mkdir b
> echo "b/y" > b/y
>
> mkdir c
> echo "c/z" > c/z
>
> mkdir d
> mount --bind a d
> mount --bind --overlay b d
> mount --bind --overlay c d
>
> cat d/x
> "a/x"
>
> cat d/y
> "b/x"

Shouldn't that be "b/y"?

> cat d/z
> "c/z"

John.
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