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{ "id": 18380, "url": "https://patchwork.libcamera.org/api/patches/18380/?format=api", "web_url": "https://patchwork.libcamera.org/patch/18380/", "project": { "id": 1, "url": "https://patchwork.libcamera.org/api/projects/1/?format=api", "name": "libcamera", "link_name": "libcamera", "list_id": "libcamera_core", "list_email": "libcamera-devel@lists.libcamera.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20230311190526.17104-1-mail@eliasnaur.com>", "date": "2023-03-11T19:05:25", "name": "[libcamera-devel] libcamera: v4l2_device: openat(2) with O_CLOEXEC to cleanup after exec(3)", "commit_ref": null, "pull_url": null, "state": "accepted", "archived": false, "hash": "cc2ce6078581aceb4e0bbcea1b7bb9d19b379dd6", "submitter": { "id": 159, "url": "https://patchwork.libcamera.org/api/people/159/?format=api", "name": "Elias Naur", "email": "mail@eliasnaur.com" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/18380/mbox/", "series": [ { "id": 3800, "url": "https://patchwork.libcamera.org/api/series/3800/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=3800", "date": "2023-03-11T19:05:25", "name": "[libcamera-devel] libcamera: v4l2_device: openat(2) with O_CLOEXEC to cleanup after exec(3)", "version": 1, "mbox": "https://patchwork.libcamera.org/series/3800/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/18380/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/18380/checks/", "tags": {}, "headers": { "Return-Path": "<libcamera-devel-bounces@lists.libcamera.org>", "X-Original-To": "parsemail@patchwork.libcamera.org", "Delivered-To": "parsemail@patchwork.libcamera.org", "Received": [ "from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 14777BE080\n\tfor <parsemail@patchwork.libcamera.org>;\n\tSat, 11 Mar 2023 20:02:37 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 832F5626D6;\n\tSat, 11 Mar 2023 21:02:36 +0100 (CET)", "from mail-vs1-xe2e.google.com (mail-vs1-xe2e.google.com\n\t[IPv6:2607:f8b0:4864:20::e2e])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 0289761ED5\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tSat, 11 Mar 2023 20:05:40 +0100 (CET)", "by mail-vs1-xe2e.google.com with SMTP id d20so7628745vsf.11\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tSat, 11 Mar 2023 11:05:40 -0800 (PST)", "from localhost.localdomain ([190.53.0.133])\n\tby smtp.gmail.com with ESMTPSA id\n\ts18-20020a05610201d200b004122a65ee17sm304032vsq.21.2023.03.11.11.05.38\n\t(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n\tSat, 11 Mar 2023 11:05:39 -0800 (PST)" ], "DKIM-Signature": [ "v=1; 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\n\tSat, 11 Mar 2023 11:05:39 -0800 (PST)", "To": "libcamera-devel@lists.libcamera.org", "Date": "Sat, 11 Mar 2023 13:05:25 -0600", "Message-Id": "<20230311190526.17104-1-mail@eliasnaur.com>", "X-Mailer": "git-send-email 2.39.2", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Mailman-Approved-At": "Sat, 11 Mar 2023 21:02:35 +0100", "Subject": "[libcamera-devel] [PATCH] libcamera: v4l2_device: openat(2) with\n\tO_CLOEXEC to cleanup after exec(3)", "X-BeenThere": "libcamera-devel@lists.libcamera.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "<libcamera-devel.lists.libcamera.org>", "List-Unsubscribe": "<https://lists.libcamera.org/options/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=unsubscribe>", "List-Archive": "<https://lists.libcamera.org/pipermail/libcamera-devel/>", "List-Post": "<mailto:libcamera-devel@lists.libcamera.org>", "List-Help": "<mailto:libcamera-devel-request@lists.libcamera.org?subject=help>", "List-Subscribe": "<https://lists.libcamera.org/listinfo/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=subscribe>", "From": "Elias Naur via libcamera-devel <libcamera-devel@lists.libcamera.org>", "Reply-To": "Elias Naur <mail@eliasnaur.com>", "Cc": "Elias Naur <mail@eliasnaur.com>", "Errors-To": "libcamera-devel-bounces@lists.libcamera.org", "Sender": "\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>" }, "content": "It's generally a good idea to openat(2) with O_CLOEXEC, but this patch\nalso fixes a problem where the v4l2 devices would report -EBUSY after\nan exec(3).\n\nSigned-off-by: Elias Naur <mail@eliasnaur.com>\n---\n src/libcamera/v4l2_device.cpp | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)", "diff": "diff --git src/libcamera/v4l2_device.cpp src/libcamera/v4l2_device.cpp\nindex 57a88d96..ad9d1e37 100644\n--- src/libcamera/v4l2_device.cpp\n+++ src/libcamera/v4l2_device.cpp\n@@ -86,7 +86,7 @@ int V4L2Device::open(unsigned int flags)\n \t\treturn -EBUSY;\n \t}\n \n-\tUniqueFD fd(syscall(SYS_openat, AT_FDCWD, deviceNode_.c_str(), flags));\n+\tUniqueFD fd(syscall(SYS_openat, AT_FDCWD, deviceNode_.c_str(), flags|O_CLOEXEC));\n \tif (!fd.isValid()) {\n \t\tint ret = -errno;\n \t\tLOG(V4L2, Error) << \"Failed to open V4L2 device '\"\n", "prefixes": [ "libcamera-devel" ] }