[Haskell-cafe] RE: ANN: System.FilePath 0.9

Duncan Coutts duncan.coutts at worc.ox.ac.uk
Thu Jul 27 14:50:13 EDT 2006

On Thu, 2006-07-27 at 11:07 -0700, Andrew Pimlott wrote:
> On Wed, Jul 26, 2006 at 04:02:31PM -0700, Andrew Pimlott wrote:
> > I admit I don't know enough to say how the lpt1 issue should be
> > handled.  Is there any Win32 call I can make that will help me avoid
> > accidentally opening these magic files?  Say, if I call open with
> > O_CREAT | O_EXCL?  Unfortunately, I can find very little information on
> > how one should handle this issue.
> Thanks to a suggestion from Bulat to use c_open, I was able to test
> O_WRONLY | O_CREAT | O_EXCL on Windows.  In fact, Windows does allow
> files like "nul" to be opened (as many times as you like) with these
> flags, which I find dismaying.  So I still don't know the proper way to
> handle them.

Interestingly even Windows explorer doesn't handle these odd files

Renaming a file to "com1" is ignored with no error, though renaming to
"com1.txt" gives an error about such a file already existing.

Also, it seems that "com1.txt.txt" is not allowed either. I thought that
the extension of "com1.txt.txt" was "txt" but it seems that it is
"txt.txt" and so the base name is "com1" and thus not allowed.


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