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peeking into stdin/stdout buffers?


Can you peek into the stdin/stdout buffers using ANSI C?  ftell() and fgetpos()
don't work, but I really can't see why they wouldn't.  I've dumped the __sFILE
structure for each, but none of the elements change.

Is there a non-ANSI C way of doing it?

All I want to do is see if any characters have been received before calling
fread().  I don't want fread() to hang the CPU while waiting for characters.

-tim