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From: guy@sun.UUCP
Newsgroups: net.lang.c
Subject: Re: What ever happened to %r in printf ?
Message-ID: <4274@sun.uucp>
Date: Thu, 19-Jun-86 14:49:39 EDT
Article-I.D.: sun.4274
Posted: Thu Jun 19 14:49:39 1986
Date-Received: Sat, 21-Jun-86 13:48:18 EDT
References: <126@danews.UUCP> <6762@utzoo.UUCP> <117@lri.UUCP>
Organization: Sun Microsystems, Inc.
Lines: 17

> I think that %r in printf was used to format a string in radix50.

Nope.  No version of UNIX released by AT&T has any support for RADIX50
whatsoever.  The "r" stood for "remote", not "RADIX50"; "%r" told "printf"
that the next argument was a pointer to a "printf"-style argument list, and
that it should use that list instead of the one it was passed.  This is very
tricky to do portably, and impossible to do on some implementations, so it
was nuked in V7.

> This format was maybe used on V6 UNIX to talk to RT11 file system,

Nope.  No version of UNIX released by AT&T knows anything about RT11, except
for VAX versions which have to deal with VAX-11/780 console floppies.
-- 
	Guy Harris
	{ihnp4, decvax, seismo, decwrl, ...}!sun!guy
	guy@sun.com (or guy@sun.arpa)