From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <swivel@shells.gnugeneration.com>
Received: from shells.gnugeneration.com (shells.gnugeneration.com
 [66.240.222.126])
 by sourceware.org (Postfix) with ESMTP id 9E5843858403
 for <libc-help@sourceware.org>; Sat, 25 Sep 2021 06:15:30 +0000 (GMT)
DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 9E5843858403
Authentication-Results: sourceware.org;
 dmarc=none (p=none dis=none) header.from=pengaru.com
Authentication-Results: sourceware.org;
 spf=pass smtp.mailfrom=shells.gnugeneration.com
Received: by shells.gnugeneration.com (Postfix, from userid 1000)
 id 887351A4036A; Fri, 24 Sep 2021 23:15:29 -0700 (PDT)
Date: Fri, 24 Sep 2021 23:15:29 -0700
From: Vito Caputo <vcaputo@pengaru.com>
To: libc-help@sourceware.org
Subject: strftime() _GNU_SOURCE extension request
Message-ID: <20210925061529.4dmdq3rbuvettzhr@shells.gnugeneration.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
X-Spam-Status: No, score=-1.6 required=5.0 tests=BAYES_00,
 HEADER_FROM_DIFFERENT_DOMAINS, KAM_DMARC_STATUS, SPF_HELO_PASS,
 SPF_PASS autolearn=no autolearn_force=no version=3.4.4
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on
 server2.sourceware.org
X-BeenThere: libc-help@sourceware.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Libc-help mailing list <libc-help.sourceware.org>
List-Unsubscribe: <https://sourceware.org/mailman/options/libc-help>,
 <mailto:libc-help-request@sourceware.org?subject=unsubscribe>
List-Archive: <https://sourceware.org/pipermail/libc-help/>
List-Help: <mailto:libc-help-request@sourceware.org?subject=help>
List-Subscribe: <https://sourceware.org/mailman/listinfo/libc-help>,
 <mailto:libc-help-request@sourceware.org?subject=subscribe>
X-List-Received-Date: Sat, 25 Sep 2021 06:15:31 -0000

Hello list,

I'd like to propose a _GNU_SOURCE extension for strftime() treating
str=NULL similarly to snprintf()'s C99 handling of str=NULL; write
nothing to str, but return the number of bytes that /would/ be written
if str were non-NULL and sufficiently large.

Thanks,
Vito Caputo