need info: %r in printf

[John A. Rogers]

I need to port some code (from DECUS C on the RT11), which uses the "%r"
format in printf.  Of course, I've never heard of "%r", and I can't find it
in K&R, or the documentation for V7 or Sys III.  Does anyone know what it is,
and (even better) how I can simulate it using standard printf formats?
				Thanks in advance...
-- 
				John Rogers
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