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=-18.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 A8891C43461 for ; Fri, 4 Sep 2020 16:12:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7418D2074D for ; Fri, 4 Sep 2020 16:12:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="Ml39Xj2J" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725984AbgIDQML (ORCPT ); Fri, 4 Sep 2020 12:12:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47964 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725966AbgIDQMK (ORCPT ); Fri, 4 Sep 2020 12:12:10 -0400 Received: from mail-il1-x143.google.com (mail-il1-x143.google.com [IPv6:2607:f8b0:4864:20::143]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7489AC061244 for ; Fri, 4 Sep 2020 09:12:10 -0700 (PDT) Received: by mail-il1-x143.google.com with SMTP id x2so6851793ilm.0 for ; Fri, 04 Sep 2020 09:12:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=FfznMM24pCQcmlGZkwidtLi3kn5mMGFxnikPN8ncSqw=; b=Ml39Xj2JBjbUoQbCUUFjwzw7QB45OfXFKl4l22YO+hyFXJtCoQAd5Kxfh+q3PyyFqs 6Fwen1iyP4pKsU1mCVNNed6i/am6C0HEAkvtBuoY9eFA8Y/ERWoX5Fx8Q5+CE7zaoSv7 2e5H3k9yNZiCpuqs/eztWq57miv7v6zM+iPuM= 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:mime-version :content-transfer-encoding; bh=FfznMM24pCQcmlGZkwidtLi3kn5mMGFxnikPN8ncSqw=; b=ii5tXYJfl+o8xgCl0d3NPB+3pEnXSjgLgEaN/PASGSlN2mvON2KAW0+PFkNhe5q3EQ LsoTp9u+cf+A+Z48Ng+Q4tlBUswI61IcbUyz13JnEah8LPxTnf7puUDNdwrt+qc/vdS7 xEZz4w57oTY3bO2FeCWvoxKKBRlHp6LhFG+uYehuqGMt9i4X8P3O51BEzc7enuAoE8Zs YMhkIraF1j4ubgNuxoyZzAG7aHKTAyX3eFFN8tvH3wTONs4nyyz8Q+q8meRup+defEP2 5Pd4GTXQ33X9CjpQf+fYeZcTdaGy9ipzkEgPj5gi2sba3hYIvhRBBIxo81U4W7NpvXuO XSKg== X-Gm-Message-State: AOAM530QbsCcidXGibOMuvc8NNGj7t4CXQL3XfTS5bBtQRTT8ZWp4cjb uqS3ywxSz1RLPaaAWi/y40o+Ig== X-Google-Smtp-Source: ABdhPJwLxqAwtKBbc5qHFTQYMco0OUdQOYO1QQ8PV1KZQ29dKMuH+gACw36++PBV7JYGq6CAvgJO6g== X-Received: by 2002:a92:5f87:: with SMTP id i7mr8132590ill.67.1599235929787; Fri, 04 Sep 2020 09:12:09 -0700 (PDT) Received: from ravnica.hsd1.co.comcast.net ([2601:285:8380:9270::8e6]) by smtp.gmail.com with ESMTPSA id l5sm3118581ios.3.2020.09.04.09.12.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Sep 2020 09:12:08 -0700 (PDT) From: Ross Zwisler X-Google-Original-From: Ross Zwisler To: mtk.manpages@gmail.com Cc: Ross Zwisler , linux-man@vger.kernel.org Subject: [PATCH] Add NOSYMFOLLOW flags to mount(2) and statfs(2) Date: Fri, 4 Sep 2020 10:12:03 -0600 Message-Id: <20200904161203.598281-1-zwisler@google.com> X-Mailer: git-send-email 2.28.0.526.ge36021eeef-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-man-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-man@vger.kernel.org These flags should first appear in Linux kernel version v5.10. Signed-off-by: Ross Zwisler --- The nosymfollow kernel code has been merged into Al Viro's tree and should be part of the v5.10 merge window. https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git/commit/?h=work.misc&id=dab741e0e02bd3c4f5e2e97be74b39df2523fc6e --- man2/mount.2 | 10 ++++++++++ man2/statfs.2 | 4 ++++ 2 files changed, 14 insertions(+) diff --git a/man2/mount.2 b/man2/mount.2 index f565ee578..039e4b83b 100644 --- a/man2/mount.2 +++ b/man2/mount.2 @@ -280,6 +280,16 @@ the flag to .BR open (2) was specified for all file opens to this filesystem). +.TP +.B MS_NOSYMFOLLOW +Do not follow symlinks when resolving paths. Symlinks can still be created, +and +.BR readlink (1), +.BR readlink (2), +.BR realpath (1) +and +.BR realpath (3) +all still work properly. .PP From Linux 2.4 onward, some of the above flags are settable on a per-mount basis, diff --git a/man2/statfs.2 b/man2/statfs.2 index 0fc537c14..d5edf2a50 100644 --- a/man2/statfs.2 +++ b/man2/statfs.2 @@ -206,6 +206,10 @@ Writes are synched to the filesystem immediately (see the description of .B O_SYNC in .BR open (2)). +.TP +.B ST_NOSYMFOLLOW +Symlinks are not followed when resolving paths; see +.BR mount (2). .PP Nobody knows what .I f_fsid -- 2.28.0.526.ge36021eeef-goog