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Date:	Tue, 8 Apr 2014 10:39:55 +0200
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: Request for Junctions be treated consistently
Message-ID:	<20140408083955.GA28755@calimero.vinschen.de>
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On Apr  7 22:04, Andrey Repin wrote:
> Greetings, Corinna Vinschen!
>=20
> >> I don't think your original concern is as big a problem as you
> >> think, as is indicated by the above setup on linux.
> >>=20
> >> I.e. is there some other reason to not treat "linkd" mounts
> >> the same as "mountvol" mounts -- in a manner equivalent to linux's
> >> 'bind' mounts?
> >>=20
> >> I.e. I don't see that that linkd which creates a junction-mount
> >> point, should be treated as a symlink.  It would provide valuable
> >> benefit in cygwin terms in being able to setup directories at
> >> multiple place like 'bind' does on linux, and be resistant to being
> >> overwritten like symlinks.
>=20
> > Look, directory reparse points are, by and large, symlinks to another,
> > real directory entry.  The directory has a primary path, which is its
> > own path under which it has been created, and the reparse point is just
> > a pointer to this directory.  If that's not a symlink, what is?
>=20
> Uhm, there's two ways to look at it.
> You may call it a "symlink", but in fact, Linux equivalent of a reparse p=
oint
> is a mount --bind, or, perhaps, a block-type device mounted at specific
> directory.

No, it's not.  There's a major difference between mount points and
symlinks, which is, mount points are handled inside the kernel, while
symlinks are filesystem objects.  Reparse points are very certainly
filesystem objects.  And bind mounts in Cygwin are handled in the
"kernel" as well.  We can't add reparse points to the mount table
on the fly.


Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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