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From: Rolf Campbell <thats DOT unpossible AT gmail DOT com>
Subject:  Re: coreutils 5.97; mkdir -p; mkdir: cannot create directory `name':    File exists
Date:  Tue, 22 Aug 2006 16:23:52 -0400
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Eric Blake wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> From: Rolf Campbell
>> I believe there is a race-condition in "mkdir -p".  Specifically, if the
>> directory does not exist *yet* when stat is called on line #98 of
>> "coreutils-5.97/lib/mkdir-p.c", but the directory *does* exist by the
>> time line #190 of the same file calls mkdir(), then the program will
>> error with "File exists".
>>
>> I hit this occasionally when doing parallel builds.
> 
> Are you sure you have the right line numbers?  The cygwin version of
> lib/mkdir-p.c is patched in coreutils-5.97-1; but even the upstream
> version takes great pains that this is not a race - yes, the directory can
> be created between the time it is statted and the mkdir, but the mkdir
> takes this into account by trying to chdir into the directory on failure,
> before giving up with an error message to the user that the file exists.
> 
> I will need a stronger argument to believe that there is a race, in which
> case, the upstream maintainers would probably like to hear it too.

Oops, after closer inspection, the problem was with my makefile. *sigh*


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