From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 33CACC432BE for ; Wed, 28 Jul 2021 20:20:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2211360F5E for ; Wed, 28 Jul 2021 20:20:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231562AbhG1UUq (ORCPT ); Wed, 28 Jul 2021 16:20:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35652 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231574AbhG1UUp (ORCPT ); Wed, 28 Jul 2021 16:20:45 -0400 Received: from mail-wm1-x335.google.com (mail-wm1-x335.google.com [IPv6:2a00:1450:4864:20::335]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D3E55C061765 for ; Wed, 28 Jul 2021 13:20:43 -0700 (PDT) Received: by mail-wm1-x335.google.com with SMTP id u15so2233985wmj.1 for ; Wed, 28 Jul 2021 13:20:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=o8UZDg9IRwUfKJt7vWmCC1kOSWrUIuySd/hdhOWQFOY=; b=ut/D5aoGf7ULkBsjnFaW8j5mB9lLfNQhSO8xZ4/Kq1aEFebFKhe2p893uLrG3PoTh6 BAqn+WM+VI6DOs0KtcJhm5JEROz2GVgClPerWPIVDvj6jk081j1gGil3XQBo9V2NJs72 33BXtoHoJdL7qUAh9yxg0vdDuVVlBWAG0Aa2iEmGSoEMvkwVGFBRHaA/GridUFczbz0r WdW6gkpKa+t1rUQVP0HpAgmwjyfsz1+yDh8aVFf6oJdkzSTNMFU5IL7IVihOM9NgDfP+ nvzqWZsdPNmKu4Woro02Sau3+KtsKoBgqUOJrT95yMOqVa8L1QZ8+qUTliXMXGg5vRAd 26xw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=o8UZDg9IRwUfKJt7vWmCC1kOSWrUIuySd/hdhOWQFOY=; b=FFOzukUbpT9lRT7ShhdVJkYfIt/wo+fl5YkYl+Jc7l2fbMPpMbPSF5eWGxW4hqmAlS pIuJe3vxIBRw/iXqbLxu+DK4rhajBGqofX5BZh0AsXc9r2BWPocjiwqEkZr+FH823D40 iKJOE1qgnJnRouiSHJnLv4KcrsCPq4abz4gDNjyyCTcGQpvWvcdltoaiMzccdeoCOonC ak+ov57GQ0cXkUnTsj69uVunmzo6Xnwblnz9pzCnEAy9HRPXuVXzCTbKlpc2Epxdbjxu c0eG5tkn7OsxCsOXl81+sKZezQb9fAhcBO3B/lc7lwrOovGAUPbuAnddwLxYdppBYrSz wmJg== X-Gm-Message-State: AOAM531c2+9ZwQRB4snBB+UZrXSlzmSF1pnoC2C8MnTbE6BmGDZCRGfX tQp6+PBJambbAfzIbDFV7v1u1MclCBs= X-Google-Smtp-Source: ABdhPJw7BxByK7xue3DfGbW0f442XQLpfAardukipbkVCPldXf5oWTLJZlJowk3XX30lXyuotEmZYQ== X-Received: by 2002:a05:600c:2319:: with SMTP id 25mr1307549wmo.27.1627503642489; Wed, 28 Jul 2021 13:20:42 -0700 (PDT) Received: from sqli.sqli.com ([195.53.121.100]) by smtp.googlemail.com with ESMTPSA id o29sm879703wms.13.2021.07.28.13.20.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 28 Jul 2021 13:20:42 -0700 (PDT) From: Alejandro Colomar To: mtk.manpages@gmail.com Cc: Alejandro Colomar , linux-man@vger.kernel.org, Jonny Grant Subject: [PATCH 30/32] strlen.3, wcslen.3: Add recommendations for safer variants Date: Wed, 28 Jul 2021 22:20:06 +0200 Message-Id: <20210728202008.3158-31-alx.manpages@gmail.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210728202008.3158-1-alx.manpages@gmail.com> References: <20210728202008.3158-1-alx.manpages@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-man@vger.kernel.org Reported-by: Jonny Grant Signed-off-by: Alejandro Colomar --- man3/strlen.3 | 6 ++++++ man3/wcslen.3 | 9 ++++++++- 2 files changed, 14 insertions(+), 1 deletion(-) diff --git a/man3/strlen.3 b/man3/strlen.3 index dea4c1050..78783c446 100644 --- a/man3/strlen.3 +++ b/man3/strlen.3 @@ -66,6 +66,12 @@ T} Thread safety MT-Safe .sp 1 .SH CONFORMING TO POSIX.1-2001, POSIX.1-2008, C89, C99, C11, SVr4, 4.3BSD. +.SH NOTES +.SS strnlen(3) +If the input buffer size is known, +it is probably better to use +.BR strnlen (3), +which can prevent reading past the end of the array. .SH SEE ALSO .BR string (3), .BR strnlen (3), diff --git a/man3/wcslen.3 b/man3/wcslen.3 index af3fcb9ca..fe1d6331b 100644 --- a/man3/wcslen.3 +++ b/man3/wcslen.3 @@ -58,5 +58,12 @@ T} Thread safety MT-Safe .sp 1 .SH CONFORMING TO POSIX.1-2001, POSIX.1-2008, C99. +.SH NOTES +.SS wcsnlen(3) +If the input buffer size is known, +it is probably better to use +.BR wcsnlen (3), +which can prevent reading past the end of the array. .SH SEE ALSO -.BR strlen (3) +.BR strlen (3), +.BR wcsnlen (3) -- 2.32.0