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Date:      Sun, 17 Jun 2001 17:42:37 +0400
From:      "Andrey A. Chernov" <ache@nagual.pp.ru>
To:        Bruce Evans <bde@zeta.org.au>
Cc:        Warner Losh <imp@harmony.village.org>, "Steve O'Hara-Smith" <steveo@eircom.net>, David Wolfskill <david@catwhisker.org>, current@FreeBSD.ORG
Subject:   Re: symlink(2) [Was: Re: tcsh.cat]
Message-ID:  <20010617174235.A49454@nagual.pp.ru>
In-Reply-To: <Pine.BSF.4.21.0106172154520.582-100000@besplex.bde.org>; from bde@zeta.org.au on Sun, Jun 17, 2001 at 11:02:50PM %2B1000
References:  <200106170518.f5H5I6V44586@harmony.village.org> <Pine.BSF.4.21.0106172154520.582-100000@besplex.bde.org>

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On Sun, Jun 17, 2001 at 23:02:50 +1000, Bruce Evans wrote:
> 
> So disallowing null symlinks would actually unbreak /etc/malloc.conf.
> 
> Further debugging shows that the main bug is in the kernel.
> stat(2) on a null symlink bogusly succeeds and classifies the symlink
> as a directory.  ln(1) just believes this so it rewrites
> "ln -fs aj /etc/malloc.conf" to "ln -fs aj /etc/malloc.conf/aj".
> The kernel then resolves /etc/malloc.conf/aj to /aj.

And this should be fixed, as I say from the very beginning.

(strangely, most people here mistreat null symlinks we discuss as
non-null symlinks with non-existen targets)

-- 
Andrey A. Chernov
http://ache.pp.ru/

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