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Message-ID: <54223951.3040801@redhat.com>
Date: Tue, 23 Sep 2014 21:24:01 -0600
From: Eric Blake <eblake@redhat.com>
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To: cygwin@cygwin.com
Subject: Re: cygport dropping  *.exe links
References: <53EDEE67.6070501@gmail.com> <53EE1D70.6080808@gmail.com> <20140815151619.GK28562@calimero.vinschen.de>
In-Reply-To: <20140815151619.GK28562@calimero.vinschen.de>
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On 08/15/2014 09:16 AM, Corinna Vinschen wrote:

Sorry for taking more than a month to get to the bottom of this one.
But I have good news:

>> $ touch a.exe
>> $ ln -s a.exe b.exe
>>  $ ls -l
>> total 1
>> -rw-r--r-- 1 marco Administrators 0 Aug 15 16:41 a.exe
>> lrwxrwxrwx 1 marco Administrators 5 Aug 15 16:41 b.exe -> a.exe
>>
>> $ mv b.exe b
>> $ ls -l
>> total 0
>> -rw-r--r-- 1 marco Administrators 0 Aug 15 16:41 a.exe
>=20
> Looks like a bug in coreutils 8.23.  This works fine in coreutils-8.15.

Actually, this was an intentional upstream change made by coreutils
8.16, but which has a negative effect on cygwin .exe magic.  The real
reason for the change is this upstream testcase:

$ ln -s nowhere a
$ ln a b
$ mv a b
$ ls [ab]
b

In coreutils 8.15, this mistakenly errored out instead of deleting 'a'.
 But the upstream fix for this needs additional cygwin magic to realize
that when 'b' and 'b.exe' are both symlinks and have the same inode,
then it is the same as a case change, and NOT a case of hard link
renames.  I'm cooking up the patch now.

--=20
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org


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