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From: gwyn%brl-vld@sri-unix.UUCP
Newsgroups: net.unix-wizards
Subject: Re:  need info: %r in printf
Message-ID: <12593@sri-arpa.UUCP>
Date: Thu, 13-Oct-83 19:15:58 EDT
Article-I.D.: sri-arpa.12593
Posted: Thu Oct 13 19:15:58 1983
Date-Received: Sat, 22-Oct-83 09:53:18 EDT
Lines: 12

From:      Doug Gwyn (VLD/VMB) <gwyn@brl-vld>

printf %r was removed in UNIX System III.  If I remember right, it was
a means of embedding a format spec ((char *) corresponding to the %r
in the main format spec) within the main format spec.  One way to
do this would be to assemble the "real" format spec with sprintf into
a char buffer (maybe strcats would be easier), then use that buffer as
the printf main format spec.

If you have code that is using printf %r, you should also be alert for
use of sprintf return value as a (char *); this was also changed in
System III.