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[2001:8b0:bf73:93f7::51bb:e332]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3c70ef55aabsm12400751f8f.23.2025.08.25.12.01.31 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Aug 2025 12:01:31 -0700 (PDT) Received: from jsm28 (helo=localhost) by digraph.polyomino.org.uk with local-esmtp (Exim 4.97) (envelope-from ) id 1uqcRc-00000000oig-3QuJ for sc22wg14@open-std.org; Mon, 25 Aug 2025 19:01:28 +0000 Date: Mon, 25 Aug 2025 19:01:28 +0000 (UTC) From: Joseph Myers To: sc22wg14@open-std.org Subject: Re: [SC22WG14.29444] New issue #1004: Classification of `scanf` failures In-Reply-To: <20250307181829.636C7356854@www.open-std.org> Message-ID: References: <20250307181829.636C7356854@www.open-std.org> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: BZOXqr0TkmenpyWAt0lx7qyYJM5y7WFCQdC0Z0107Yk_1756148492 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Sender: owner-sc22wg14@open-std.org Precedence: bulk Given the desire in the meeting today to make this a matching failure rather than a third kind of failure, I propose the following wording (subclause references based on C23). In 7.23.6.3 (The fscanf function), after "Failures are described as input failures (due to the occurrence of an encoding error or the unavailability of input characters), or matching failures (due to inappropriate input)." insert "If the implementation does not support a specific width length modifier, this is a matching failure.". Remove "or if the implementation does not support a specific width length modifier" under Returns. Make the same changes in 7.31.2.3 (The fwscanf function). This would also supersede all the changes for scanf functions for issue #1012. -- Joseph S. Myers josmyers@redhat.com