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([2001:a61:2553:a401:cfc6:2039:a9ec:21ff]) by smtp.gmail.com with ESMTPSA id j30sm31996983wrj.62.2021.04.05.12.48.17 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 05 Apr 2021 12:48:18 -0700 (PDT) Cc: mtk.manpages@gmail.com, Alyssa Ross , linux-man@vger.kernel.org Subject: Re: [PATCH 1/5] scanf.3: clarify that %n supports type modifiers To: Alejandro Colomar References: <20210405131307.2892-1-alx.manpages@gmail.com> <20210405131307.2892-2-alx.manpages@gmail.com> From: "Michael Kerrisk (man-pages)" Message-ID: <0d38058f-5b74-e22c-5df5-f5bb7643ba9b@gmail.com> Date: Mon, 5 Apr 2021 21:48:15 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.0 MIME-Version: 1.0 In-Reply-To: <20210405131307.2892-2-alx.manpages@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-man@vger.kernel.org Hello Alex and Alyssa, On 4/5/21 3:13 PM, Alejandro Colomar wrote: > From: Alyssa Ross > > My initial reading of this was that type modifiers were probably not > supported. But they are, and this is actually documented further up, > in the type modifiers documentation. But to make it clearer, let's > copy the language that printf(3) has in its %n section. > > Signed-off-by: Alyssa Ross > Signed-off-by: Alejandro Colomar > --- > man3/scanf.3 | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/man3/scanf.3 b/man3/scanf.3 > index e6d00c9f1..bd49a6caf 100644 > --- a/man3/scanf.3 > +++ b/man3/scanf.3 > @@ -526,7 +526,9 @@ the next pointer must be a pointer to a pointer to > Nothing is expected; instead, the number of characters consumed thus far > from the input is stored through the next pointer, which must be a pointer > to > -.IR int . > +.IR int , > +or variant whose size matches the (optionally) > +supplied integer length modifier. > This is > .I not > a conversion and does Thanks. Patch applied. Cheers, Michael -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/