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[2001:14ba:16f3:4a00::4]) by smtp.gmail.com with ESMTPSA id 5-20020ac25f05000000b0049d83646ce7sm378761lfq.110.2022.10.13.05.04.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Oct 2022 05:04:24 -0700 (PDT) Date: Thu, 13 Oct 2022 15:04:04 +0300 From: Matti Vaittinen To: Matti Vaittinen , Matti Vaittinen Cc: Jonathan Cameron , Lars-Peter Clausen , Hartmut Knaack , linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] tools: iio: iio_utils: fix digit calculation Message-ID: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="AeOA1JcKrLrt2PA9" Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --AeOA1JcKrLrt2PA9 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" The iio_utils uses a digit calculation in order to know length of the file name containing a buffer number. The digit calculation does not work for number 0. This leads to allocation of one character too small buffer for the file-name when file name contains value '0'. (Eg. buffer0). Fix digit calculation by returning one digit to be present for number '0'. Fixes: 096f9b862e60 ("tools:iio:iio_utils: implement digit calculation") Signed-off-by: Matti Vaittinen --- tools/iio/iio_utils.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/iio/iio_utils.c b/tools/iio/iio_utils.c index aadee6d34c74..8d35893b2fa8 100644 --- a/tools/iio/iio_utils.c +++ b/tools/iio/iio_utils.c @@ -547,6 +547,10 @@ static int calc_digits(int num) { int count =3D 0; =20 + /* It takes a digit to represent zero */ + if (!num) + return 1; + while (num !=3D 0) { num /=3D 10; count++; base-commit: 4fe89d07dcc2804c8b562f6c7896a45643d34b2f --=20 2.37.3 --=20 Matti Vaittinen, Linux device drivers ROHM Semiconductors, Finland SWDC Kiviharjunlenkki 1E 90220 OULU FINLAND ~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~ Simon says - in Latin please. ~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~ Thanks to Simon Glass for the translation =3D]=20 --AeOA1JcKrLrt2PA9 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEIx+f8wZb28fLKEhTeFA3/03aocUFAmNH/qQACgkQeFA3/03a ocWOFAgAwiW7uYbSJ2Q68k9t5UV7f8QSoBscJBXXNQJxnpIJMQgGPHMkwHdXw71u ICNrglVe+pTZw96rEoOAXrng4L1Z5Ce4rw9q1V2AQ3ROjDK2pXf+eGlhvzxy9KYI pMc3x5AcsJ6QtCWRyZAaZVAW9LvIXuqpiUvC8Pay4V02kw8fwkeyMMZEqDv3Y8b0 naCEM6Y0kJG+oxDrPQWQeD6QgXYLhjgoHGiHaLet3Rcia+JA975DCW/pxpNO1jeX ijhiLYUXOf1ZS/ZpjBnFv+UwEtxdn8211l1MV/Gm6LW2SoFBwIsroEHidTnCKFzk ERhGgqlRszhEv7lQsXpeCpR52Sj/hw== =U0FS -----END PGP SIGNATURE----- --AeOA1JcKrLrt2PA9--