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Date: Mon, 12 Dec 2005 06:20:41 -0700
From: Eric Blake <ebb9 AT byu DOT net>
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To: Krzysztof Duleba <krzysan AT skrzynka DOT pl>
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Subject: Re: exim 4.54-1 and broken symlinks
References: <dn99cp$6kv$1 AT sea DOT gmane DOT org> <020a01c5fc0b$9a51d060$fb0010ac AT wirelessworld DOT airvananet DOT com> <dn9uhs$ib1$1 AT sea DOT gmane DOT org> <dna00f$nk5$1 AT sea DOT gmane DOT org> <026d01c5fc3d$68641040$fb0010ac AT wirelessworld DOT airvananet DOT com> <dnjjpu$c22$1 AT sea DOT gmane DOT org>
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According to Krzysztof Duleba on 12/12/2005 3:35 AM:
> 
> And ln -s -f a b produces b ==> a if a.exe doesn't exist yet.

You are correct that the behavior of cygwin ln in the presence of symlinks
has not been consistent in the past.  I think the current behavior (in
5.3.0-9 or 5.93-1) is the most sane - if linking to an existing file, .exe
is appended to the link if the existing file had .exe; otherwise, nothing
is done.  There is also the cygwin-specific --disable-exe-magic option to
bypass .exe magic when creating symlinks.

Beyond that, once a symlink was created (either by the packager, or by a
postinstall script) with inconsistent use of .exe using an older version
of ln, or by creating the symlink before the .exe, you will run into these
potential issues.

Let me know if I need to do any further looking into the behavior of ln,
or whether this particular symlink issue is taken care of by
reinstallation and/or improved exim postinstall scripts.

- --
Life is short - so eat dessert first!

Eric Blake             ebb9 AT byu DOT net
volunteer cygwin coreutils maintainer
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