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Date:	Tue, 8 Jan 2008 15:19:17 +0100
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: Trouble with cygwin git
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On Jan  2 19:35, MP wrote:
> I dug into this, and found that the failure happens here:
> 
>     res = fh->link (newpath);
> 
> in the link() function of file src/winsup/cygwin/syscalls.cc.  res is -1, and 
> errno == EEXIST at this point.
> 
> In the call above, newpath is:
> /cygdrive/c/git/git/.git/objects/pack/pack-
> d629a7029e3a941884c4bea2b33cc27e32f55779.pack
> 
> Digging further, this line fails:
> 
>     if (CreateHardLinkA (newpc, pc, NULL))
>       goto success;
> 
> in function fhandler_disk_file::link(), fhandler_disk_file.cc.  CreateHardLinkA
> () returns 0, and GetLastError() returns 183 (ERROR_ALREADY_EXISTS: Cannot 
> create a file when that file already exists).
> 
> In the CreateHardLinkA() call above, newpc.get_win32() yields:
> c:\git\git\.git\objects\pack\pack-d629a7029e3a941884c4bea2b33cc27e32f55779.pack
> 
> pc.get_win32() yields:
> c:\git\git\.git\objects\tmp_pack_btsO9s
> 
> I know that the destination file (newpc) does not exist; so I am perplexed why 
> CreateHardLinkA() is failing.  In the CreateHardLink() documentation on MSDN, 
> I see this comment:
> 
> "if you open a file that does not allow sharing, another application cannot 
> share the file by creating a new hard link to the file"
> 
> However, I see that all calls to CreateFile() in XP Cygwin happen with:
> 
> FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE
> 
> Any ideas why CreateHardLinkA() could still be failing?

Could you create a simple, self-contained testcase in plain C, which
allows to reproduce the problem?


Corinna


-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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