Missing stdio features.

[david at ism780]

My wish list for stdio would include the following function: 

	flushall ();

Flushall would be used to make sure that all output done to stdio 
files was actually written to the file  system.   Flushall  would
fflush all stdio files that are currently in output mode, similar 
to  what  _cleanup  does but without closing the files.  It would
not affect files that are in input mode.  This allows one to  not
be concerned with having things flushed until it is required, for 
example if one uses the functions fork, exec, sync, ustat, quota, 
or abort.