Date: Fri, 20 Sep 2002 09:31:48 +1000 From: Tim Robbins <tjr@FreeBSD.org> To: Lukas Ertl <l.ertl@univie.ac.at> Cc: freebsd-standards@FreeBSD.org Subject: Re: standards/41576: POSIX compliance of ln(1) Message-ID: <20020920093148.A66405@dilbert.robbins.dropbear.id.au> In-Reply-To: <Pine.WNT.4.44.0209192251530.652-100000@korben>; from l.ertl@univie.ac.at on Thu, Sep 19, 2002 at 10:54:35PM %2B0200 References: <20020819210645.L310-100000@leelou.in.tern> <Pine.WNT.4.44.0209192251530.652-100000@korben>
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On Thu, Sep 19, 2002 at 10:54:35PM +0200, Lukas Ertl wrote: > On Mon, 19 Aug 2002, Lukas Ertl wrote: > > > 1) $ ln -sf bar bla > > > > and > > > > 2) $ ln -sf bar bla/ > > > > The first version should replace the symlink, the second one should create > > a new symlink in the already referenced directory (as it currently happens > > on FreeBSD). ln on AIX does exactly that. Of course, AIX could be > > completely broken (as usual :-), but this is how I read the standard. > > Has someone of you thought about this one since then? I have taken a look > at the source code and AFAICS if we implement it like this we would have > to throw out the -h option. I don't know if this would break a lot of > things and if it would be a good idea. > > What do you think about it? I think that AIX is using lstat() on the target pathname to check whether it exists or not - the behaviour you describe is consistent with that. The standard says nothing explicitly about following symlinks, but I'm not sure whether it should be implied. The questionable sentences are these: If the last operand specifies an existing file of a type not specified by the System Interfaces volume of IEEE Std 1003.1-2001, the behavior is implementation-defined. The second synopsis form shall be assumed when the final operand names an existing directory. I still don't have an answer, though... Tim To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-standards" in the body of the message
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