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Date:      Sat, 16 Jun 2001 20:19:59 +0200
From:      Poul-Henning Kamp <phk@critter.freebsd.dk>
To:        Jordan Hubbard <jkh@osd.bsdi.com>
Cc:        dillon@earth.backplane.com, bde@zeta.org.au, steveo@eircom.net, david@catwhisker.org, current@FreeBSD.ORG
Subject:   Re: symlink(2) [Was: Re: tcsh.cat] 
Message-ID:  <89423.992715599@critter>
In-Reply-To: Your message of "Fri, 15 Jun 2001 22:15:21 PDT." <20010615221521A.jkh@osd.bsdi.com> 

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In message <20010615221521A.jkh@osd.bsdi.com>, Jordan Hubbard writes:
>From: Matt Dillon <dillon@earth.backplane.com>
>Subject: Re: symlink(2) [Was: Re: tcsh.cat]
>Date: Fri, 15 Jun 2001 22:01:47 -0700 (PDT)
>
>>     Symlinks do not have to contain paths.  People use them for all sorts
>>     of things so it would be totally inappropriate to put any sort of
>
>True.  It would break phk's malloc debugging features to disable this,
>for example.

Not only that, but considerning that a symlink can point into a
different filesystem even in normal use, there is no simple way to
validate the valididty of the name.

Consider this symlink:

	ln -s /my_FAT16_filesystem/foo:bar /tmp/blaf

as a silly example of this.

The only two real restrictions on symlinks are that they cannot
contain NUL characters and that '/' means what '/' does in all
filesystem naming on UNIX.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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