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t=1564058457; bh=Hw27FxLaYi5ffFA7g+fgj355c4ti6LrH7CfmS8MEk9g=; h=X-UI-Sender-Class:Subject:To:Cc:References:From:Date:In-Reply-To; b=qdeLOGQafB+Ou6qsfsfY7LYh8/+7RimVgyWMWxTmAjmpB0Qbq2quobID3j0ynhnOQ N1QNyJ5hZMJKAsln/N4b7+v0OyJkfG+vCwW3go6eQIFoUwnPtfjoIQMdTtBWmyec20 FfCk8mCxQO+nlUr7qF9NuVLoTTn8M0ekoejJ3tYM= X-UI-Sender-Class: c548c8c5-30a9-4db5-a2e7-cb6cb037b8f9 Received: from [192.168.1.2] ([93.132.39.22]) by smtp.web.de (mrweb103 [213.165.67.124]) with ESMTPSA (Nemesis) id 0MLxwG-1hl9vx1TFE-007oTB; Thu, 25 Jul 2019 14:40:57 +0200 Subject: Re: [1/2] string: Add stracpy and stracpy_pad mechanisms To: Julia Lawall Cc: Joe Perches , cocci@systeme.lip6.fr, kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org, David Laight References: From: Markus Elfring Openpgp: preference=signencrypt Autocrypt: addr=Markus.Elfring@web.de; prefer-encrypt=mutual; keydata= mQINBFg2+xABEADBJW2hoUoFXVFWTeKbqqif8VjszdMkriilx90WB5c0ddWQX14h6w5bT/A8 +v43YoGpDNyhgA0w9CEhuwfZrE91GocMtjLO67TAc2i2nxMc/FJRDI0OemO4VJ9RwID6ltwt mpVJgXGKkNJ1ey+QOXouzlErVvE2fRh+KXXN1Q7fSmTJlAW9XJYHS3BDHb0uRpymRSX3O+E2 lA87C7R8qAigPDZi6Z7UmwIA83ZMKXQ5stA0lhPyYgQcM7fh7V4ZYhnR0I5/qkUoxKpqaYLp YHBczVP+Zx/zHOM0KQphOMbU7X3c1pmMruoe6ti9uZzqZSLsF+NKXFEPBS665tQr66HJvZvY GMDlntZFAZ6xQvCC1r3MGoxEC1tuEa24vPCC9RZ9wk2sY5Csbva0WwYv3WKRZZBv8eIhGMxs rcpeGShRFyZ/0BYO53wZAPV1pEhGLLxd8eLN/nEWjJE0ejakPC1H/mt5F+yQBJAzz9JzbToU 5jKLu0SugNI18MspJut8AiA1M44CIWrNHXvWsQ+nnBKHDHHYZu7MoXlOmB32ndsfPthR3GSv jN7YD4Ad724H8fhRijmC1+RpuSce7w2JLj5cYj4MlccmNb8YUxsE8brY2WkXQYS8Ivse39MX BE66MQN0r5DQ6oqgoJ4gHIVBUv/ZwgcmUNS5gQkNCFA0dWXznQARAQABtCZNYXJrdXMgRWxm cmluZyA8TWFya3VzLkVsZnJpbmdAd2ViLmRlPokCVAQTAQgAPhYhBHDP0hzibeXjwQ/ITuU9 Figxg9azBQJYNvsQAhsjBQkJZgGABQsJCAcCBhUICQoLAgQWAgMBAh4BAheAAAoJEOU9Figx g9azcyMP/iVihZkZ4VyH3/wlV3nRiXvSreqg+pGPI3c8J6DjP9zvz7QHN35zWM++1yNek7Ar OVXwuKBo18ASlYzZPTFJZwQQdkZSV+atwIzG3US50ZZ4p7VyUuDuQQVVqFlaf6qZOkwHSnk+ CeGxlDz1POSHY17VbJG2CzPuqMfgBtqIU1dODFLpFq4oIAwEOG6fxRa59qbsTLXxyw+PzRaR LIjVOit28raM83Efk07JKow8URb4u1n7k9RGAcnsM5/WMLRbDYjWTx0lJ2WO9zYwPgRykhn2 sOyJVXk9xVESGTwEPbTtfHM+4x0n0gC6GzfTMvwvZ9G6xoM0S4/+lgbaaa9t5tT/PrsvJiob kfqDrPbmSwr2G5mHnSM9M7B+w8odjmQFOwAjfcxoVIHxC4Cl/GAAKsX3KNKTspCHR0Yag78w i8duH/eEd4tB8twcqCi3aCgWoIrhjNS0myusmuA89kAWFFW5z26qNCOefovCx8drdMXQfMYv g5lRk821ZCNBosfRUvcMXoY6lTwHLIDrEfkJQtjxfdTlWQdwr0mM5ye7vd83AManSQwutgpI q+wE8CNY2VN9xAlE7OhcmWXlnAw3MJLW863SXdGlnkA3N+U4BoKQSIToGuXARQ14IMNvfeKX NphLPpUUnUNdfxAHu/S3tPTc/E/oePbHo794dnEm57LuuQINBFg2+xABEADZg/T+4o5qj4cw nd0G5pFy7ACxk28mSrLuva9tyzqPgRZ2bdPiwNXJUvBg1es2u81urekeUvGvnERB/TKekp25 4wU3I2lEhIXj5NVdLc6eU5czZQs4YEZbu1U5iqhhZmKhlLrhLlZv2whLOXRlLwi4jAzXIZAu 76mT813jbczl2dwxFxcT8XRzk9+dwzNTdOg75683uinMgskiiul+dzd6sumdOhRZR7YBT+xC wzfykOgBKnzfFscMwKR0iuHNB+VdEnZw80XGZi4N1ku81DHxmo2HG3icg7CwO1ih2jx8ik0r riIyMhJrTXgR1hF6kQnX7p2mXe6K0s8tQFK0ZZmYpZuGYYsV05OvU8yqrRVL/GYvy4Xgplm3 DuMuC7/A9/BfmxZVEPAS1gW6QQ8vSO4zf60zREKoSNYeiv+tURM2KOEj8tCMZN3k3sNASfoG fMvTvOjT0yzMbJsI1jwLwy5uA2JVdSLoWzBD8awZ2X/eCU9YDZeGuWmxzIHvkuMj8FfX8cK/ 2m437UA877eqmcgiEy/3B7XeHUipOL83gjfq4ETzVmxVswkVvZvR6j2blQVr+MhCZPq83Ota xNB7QptPxJuNRZ49gtT6uQkyGI+2daXqkj/Mot5tKxNKtM1Vbr/3b+AEMA7qLz7QjhgGJcie qp4b0gELjY1Oe9dBAXMiDwARAQABiQI8BBgBCAAmFiEEcM/SHOJt5ePBD8hO5T0WKDGD1rMF Alg2+xACGwwFCQlmAYAACgkQ5T0WKDGD1rOYSw/+P6fYSZjTJDAl9XNfXRjRRyJSfaw6N1pA Ahuu0MIa3djFRuFCrAHUaaFZf5V2iW5xhGnrhDwE1Ksf7tlstSne/G0a+Ef7vhUyeTn6U/0m +/BrsCsBUXhqeNuraGUtaleatQijXfuemUwgB+mE3B0SobE601XLo6MYIhPh8MG32MKO5kOY hB5jzyor7WoN3ETVNQoGgMzPVWIRElwpcXr+yGoTLAOpG7nkAUBBj9n9TPpSdt/npfok9ZfL /Q+ranrxb2Cy4tvOPxeVfR58XveX85ICrW9VHPVq9sJf/a24bMm6+qEg1V/G7u/AM3fM8U2m tdrTqOrfxklZ7beppGKzC1/WLrcr072vrdiN0icyOHQlfWmaPv0pUnW3AwtiMYngT96BevfA qlwaymjPTvH+cTXScnbydfOQW8220JQwykUe+sHRZfAF5TS2YCkQvsyf7vIpSqo/ttDk4+xc Z/wsLiWTgKlih2QYULvW61XU+mWsK8+ZlYUrRMpkauN4CJ5yTpvp+Orcz5KixHQmc5tbkLWf x0n1QFc1xxJhbzN+r9djSGGN/5IBDfUqSANC8cWzHpWaHmSuU3JSAMB/N+yQjIad2ztTckZY pwT6oxng29LzZspTYUEzMz3wK2jQHw+U66qBFk8whA7B2uAU1QdGyPgahLYSOa4XAEGb6wbI FEE= Message-ID: <42a3af53-e349-6c5b-fa0f-0113fccbe9eb@web.de> Date: Thu, 25 Jul 2019 14:40:43 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:V8yVvRyx3HvDzlv9nkqUqzKC6COo35nwhRAN4A9IW4JgDZJcTPS tiXXpsTxxiB0bOUW4chfrdFgDxN/h888HSO2Qku7J2bgy6cUuMDhqN0i+tMH78rVRHqVJDZ dIYAU501zurwMCOt2+mX+1BiZophbENbzFApX8IxMHHQcPV/8g8gdlERcYg2nkxclMOdHVl NuY8iLkkZ9nvA0tMM5a/w== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:fGkDaJ0qqIc=:2HcU0AiEzrotcPgaHLeu9V ni0RznqRBetURaKPY2VhUxQxk+B0h+TKeTnsaPJlD90/zuiI26c5CyDeVEeFD2I2BMxQbDIaD 9DSCrACfhjVQxBJMSgVHf2YTkTgDzR21Sbrd2RgNpChERmjhvTZ6+y8e7pD624dgP7D7dS6Tm ZwzSLeMsDhHt73E1bXCqTXalc5y8mm3xPqAM1dbUF4Y6miqLKoXnsgUDzfNFt7upZA9hD32hH EDt+lmv9acVYIrBHPhZeMJw1xaekI19aJlZdqyfc0dlwjjVCnKK4g7CLAdEhACZ32Htqt3XtD tlTlRF6Kf4EzRJAZXpcMNjFNZUrjrtNcLEPbCSS0UxIOc/E2JxpUaMvVRHmJFxNOLNNDiWSlE HVfwpGrOmaQfh84mMHyvN0pfK5+uwOuT0+Tm/LP8v0Hh/Cyk+6Q7jPF5HExl6MImJtgr8IlEC QeRGvOcAVfPF7YZAJgbEV9uj8kQ426uhkb3kGMeVHFHOTU1UVDzCXE0JU41AgZ3teLATaowHs 9/JI8xDiP1iZOfdeex9Vcr/YmR7ep6z38mP5Csf5MBkObq3IKCZ9c2RVY7hb16pwJBV2ue2pd 8RMOaT1oWWLu9yOUft5CPpXVgCw3Xg6NKcuEzbHLSpoXDorHnDL4ibUARgnEcENKhECVqiab5 Pwe2dIQTOU0Q4h7zFUT2VK8ArzhWxZ9lw7USbDsLTHWp/IjZAZEewLCSERcvOTnUFZLl11zoJ +8Ny0RiQRdQMpS3cva3Qp/Q3rqOhr+cDCyN/nbI7Frn/lv46fa+VMU24puYtlyQK+GY2aQ7XG aGO/J1VA1Bvy9EJ3GHAhsssI/xN+Vvu/2O44qsGVK+vxfgbuR+LxtQYCLrP21GBIQsndtJvXk FZAgSUrvRPvuyut3xSCRvLntcXZI1yEa9f2nsUXPlEgD61TjTnToKIWCadVm1TbCtVw0869rz P/gc9e8OzqCs4IARNQyPsHhLNId4iNvniPRf5VjG/QNgdDQJ0+JJikv75FboS8XZqCP3vYWJN rVcDqfBPn3c9cnQzEi+QlrGqddMJFaC69/XtO3luHoiGMJBzCb+Lp1I6RoWNIqrM/oxzykaoe l/zRleSATcqpt1vqrLhe3AwCXLta2GQqn4U Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org >>> @@ >>> ( >>> -x =3D strlcpy >>> +stracpy >>> (e1.f, e2 >>> - , i2 >>> )@p; >>> ... when !=3D x >>> >>> | >> >> I wonder about the deletion of the assignment target. >> Should the setting of such a variable be usually preserved? > > If it is a local variable and never subsequently used, it doesn't seem > very useful. Such an explanation is easier to understand. * How do you think about the possibility that it was (accidentally) forgotten to use such a local variable? * Your transformation can result in an intentionally unused return value. Would you like point any more source code places out where values are unused so far? Regards, Markus