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C99 freopen

freopen(NULL, ...) has a defined meaning in C99:

       [#3]  If  filename  is  a null pointer, the freopen function
       attempts to change the mode of the stream to that  specified
       by  mode,  as  if  the name of the file currently associated
       with the stream had been used.  It is implementation-defined
       which changes of mode are permitted (if any), and under what
       circumstances.

Anyone who wants to implement this?  Currently we always return NULL with
errno == EFAULT.

Andreas.

-- 
Andreas Schwab                                  "And now for something
SuSE Labs                                        completely different."
Andreas.Schwab@suse.de
SuSE GmbH, Schanzäckerstr. 10, D-90443 Nürnberg
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