Date: Mon, 18 Jun 2001 10:46:27 -0700 (PDT) From: Matt Dillon <dillon@earth.backplane.com> To: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> Cc: "Andrey A. Chernov" <ache@nagual.pp.ru>, current@FreeBSD.ORG, FreeBSD-standards@bostonradio.org Subject: Re: Ok, try this patch. (was Re: symlink(2) [Was: Re: tcsh.cat]) Message-ID: <200106181746.f5IHkRE16410@earth.backplane.com> References: <200106180149.f5I1nma09752@earth.backplane.com> <Pine.BSF.4.21.0106181454450.6291-100000@besplex.bde.org> <200106181553.LAA56935@khavrinen.lcs.mit.edu> <20010618205944.A6595@nagual.pp.ru> <200106181722.NAA57757@khavrinen.lcs.mit.edu> <20010618213516.A7179@nagual.pp.ru> <200106181740.NAA58004@khavrinen.lcs.mit.edu>
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:<<On Mon, 18 Jun 2001 21:35:17 +0400, "Andrey A. Chernov" <ache@nagual.pp.ru> said:
:
:>> > ./foo/ .//
:>> > ./foo/bar .//bar
:>>
:>> No, because the ``resulting filename'' begins with a slash.
:
:> It seems resulting filename (pathname?) begins with "./" (not a slash).
:
:No, it doesn't. The ``resulting filename'' is "/" in the first case,
:and "/bar" in the second case. Both begin with a slash, and so are
:resolved relative to the root. There is no "./" involved anywhere in
:the process.
:
:The value of the symbolic link is not somehow inserted into the path
:being resolved. Once a symbolic link is encountered, pathname
:resolution *starts over* with the last directory searched in the old
:path used as the current working directory.
:
:-GAWollman
Right, and since "" is an illegal path name...
In anycase, I can't imagine that POSIX actually intended null symlinks
to act in any particular way, and obviously they are cause for a great
deal of confusion, and I don't know a single person who uses a null
symlink on purpose. So I say we simply disallow them, hence the patch.
If someone wants a symlink to point to / they can make it point to "/".
If someone wants a symlink to point to the current directory they can
make it point to ".".
-Matt
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