[{"id":4885,"web_url":"https://patchwork.libcamera.org/comment/4885/","msgid":"<20200522114759.u55dxqvof5zfxuhi@uno.localdomain>","date":"2020-05-22T11:47:59","subject":"Re: [libcamera-devel] [PATCH] v4l2: Relicense V4L2 compatibility\n\tlayer under LGPL","submitter":{"id":3,"url":"https://patchwork.libcamera.org/api/people/3/","name":"Jacopo Mondi","email":"jacopo@jmondi.org"},"content":"Hi Laurent,\n\nOn Fri, May 22, 2020 at 02:03:36PM +0300, Laurent Pinchart wrote:\n> The V4L2 compatibility layer is licensed under the GPL. It is compiled\n> as a binary separate from libcamera.so, and is loaded into the address\n> space of processes through LD_PRELOAD to intercept calls to the C\n> library.\n>\n> It is our understanding and intent that the GPL license doesn't\n> propagate to the binaries whose calls are intercepted, considering those\n> binaries are not derivative work of the V4L2 compatibility layer and are\n> not designed to be linked to the V4L2 compatibility layer. There is\n> however a possibly grey area if binaries are packaged with a shell\n> script wrapper that loads the V4L2 compatibility layer. This could lead\n> to license-related issues if such packaging is performed by Linux\n> distributions or system integrators.\n>\n> To clarify the intent and lift the doubts, relicense the V4L2\n> compatibility layer under the LGPL. The V4L2 compatibility layer code\n> itself still benefits from the license protection, while its usage with\n> third-party binaries is clearly allowed as intended.\n>\n> Signed-off-by: Laurent Pinchart \n\nAcked-by: Jacopo Mondi \n\nAs Paul is the amin author of that part his ack is probably more\nrelevant than mine though\n\nThanks\n j\n\n> ---\n> src/v4l2/v4l2_camera.cpp | 2 +-\n> src/v4l2/v4l2_camera.h | 2 +-\n> src/v4l2/v4l2_camera_proxy.cpp | 2 +-\n> src/v4l2/v4l2_camera_proxy.h | 2 +-\n> src/v4l2/v4l2_compat.cpp | 2 +-\n> src/v4l2/v4l2_compat_manager.cpp | 2 +-\n> src/v4l2/v4l2_compat_manager.h | 2 +-\n> 7 files changed, 7 insertions(+), 7 deletions(-)\n>\n> diff --git a/src/v4l2/v4l2_camera.cpp b/src/v4l2/v4l2_camera.cpp\n> index 50a4121cc93f..4da01a450dca 100644\n> --- a/src/v4l2/v4l2_camera.cpp\n> +++ b/src/v4l2/v4l2_camera.cpp\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_camera.h b/src/v4l2/v4l2_camera.h\n> index c969130fb37d..303eda44ca1d 100644\n> --- a/src/v4l2/v4l2_camera.h\n> +++ b/src/v4l2/v4l2_camera.h\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_camera_proxy.cpp b/src/v4l2/v4l2_camera_proxy.cpp\n> index 19e8f6d3b98d..3df4d42b59ea 100644\n> --- a/src/v4l2/v4l2_camera_proxy.cpp\n> +++ b/src/v4l2/v4l2_camera_proxy.cpp\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_camera_proxy.h b/src/v4l2/v4l2_camera_proxy.h\n> index e15b230d5f23..af9f9bbe83d5 100644\n> --- a/src/v4l2/v4l2_camera_proxy.h\n> +++ b/src/v4l2/v4l2_camera_proxy.h\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_compat.cpp b/src/v4l2/v4l2_compat.cpp\n> index a162037f6dc7..2a9a17629106 100644\n> --- a/src/v4l2/v4l2_compat.cpp\n> +++ b/src/v4l2/v4l2_compat.cpp\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_compat_manager.cpp b/src/v4l2/v4l2_compat_manager.cpp\n> index cd8ac0b8e819..2338a0ee1dd2 100644\n> --- a/src/v4l2/v4l2_compat_manager.cpp\n> +++ b/src/v4l2/v4l2_compat_manager.cpp\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_compat_manager.h b/src/v4l2/v4l2_compat_manager.h\n> index 872c7c3b10e8..14338a59deca 100644\n> --- a/src/v4l2/v4l2_compat_manager.h\n> +++ b/src/v4l2/v4l2_compat_manager.h\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> --\n> Regards,\n>\n> Laurent Pinchart\n>\n> _______________________________________________\n> libcamera-devel mailing list\n> libcamera-devel@lists.libcamera.org\n> https://lists.libcamera.org/listinfo/libcamera-devel","headers":{"Return-Path":"","Received":["from relay11.mail.gandi.net (relay11.mail.gandi.net\n\t[217.70.178.231])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 23FEB603D6\n\tfor ;\n\tFri, 22 May 2020 13:44:44 +0200 (CEST)","from uno.localdomain (93-34-118-233.ip49.fastwebnet.it\n\t[93.34.118.233]) (Authenticated sender: jacopo@jmondi.org)\n\tby relay11.mail.gandi.net (Postfix) with ESMTPSA id 98DEA100009;\n\tFri, 22 May 2020 11:44:43 +0000 (UTC)"],"Date":"Fri, 22 May 2020 13:47:59 +0200","From":"Jacopo Mondi ","To":"Laurent Pinchart ","Cc":"libcamera-devel@lists.libcamera.org","Message-ID":"<20200522114759.u55dxqvof5zfxuhi@uno.localdomain>","References":"<20200522110336.9081-1-laurent.pinchart@ideasonboard.com>","MIME-Version":"1.0","Content-Type":"text/plain; charset=utf-8","Content-Disposition":"inline","In-Reply-To":"<20200522110336.9081-1-laurent.pinchart@ideasonboard.com>","Subject":"Re: [libcamera-devel] [PATCH] v4l2: Relicense V4L2 compatibility\n\tlayer under LGPL","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","X-List-Received-Date":"Fri, 22 May 2020 11:44:44 -0000"}},{"id":4886,"web_url":"https://patchwork.libcamera.org/comment/4886/","msgid":"<8a7e6597-fe6d-05a2-71fa-5b2a4d529c7c@ideasonboard.com>","date":"2020-05-22T13:59:12","subject":"Re: [libcamera-devel] [PATCH] v4l2: Relicense V4L2 compatibility\n\tlayer under LGPL","submitter":{"id":4,"url":"https://patchwork.libcamera.org/api/people/4/","name":"Kieran Bingham","email":"kieran.bingham@ideasonboard.com"},"content":"Hi Laurent,\n\nOn 22/05/2020 12:03, Laurent Pinchart wrote:\n> The V4L2 compatibility layer is licensed under the GPL. It is compiled\n> as a binary separate from libcamera.so, and is loaded into the address\n> space of processes through LD_PRELOAD to intercept calls to the C\n> library.\n> \n> It is our understanding and intent that the GPL license doesn't\n> propagate to the binaries whose calls are intercepted, considering those\n> binaries are not derivative work of the V4L2 compatibility layer and are\n> not designed to be linked to the V4L2 compatibility layer. There is\n> however a possibly grey area if binaries are packaged with a shell\n> script wrapper that loads the V4L2 compatibility layer. This could lead\n> to license-related issues if such packaging is performed by Linux\n> distributions or system integrators.\n> \n> To clarify the intent and lift the doubts, relicense the V4L2\n> compatibility layer under the LGPL. The V4L2 compatibility layer code\n> itself still benefits from the license protection, while its usage with\n> third-party binaries is clearly allowed as intended.\n\n\nNo objections here.\n\nAcked-by: Kieran Bingham \n\n> Signed-off-by: Laurent Pinchart \n> ---\n> src/v4l2/v4l2_camera.cpp | 2 +-\n> src/v4l2/v4l2_camera.h | 2 +-\n> src/v4l2/v4l2_camera_proxy.cpp | 2 +-\n> src/v4l2/v4l2_camera_proxy.h | 2 +-\n> src/v4l2/v4l2_compat.cpp | 2 +-\n> src/v4l2/v4l2_compat_manager.cpp | 2 +-\n> src/v4l2/v4l2_compat_manager.h | 2 +-\n> 7 files changed, 7 insertions(+), 7 deletions(-)\n> \n> diff --git a/src/v4l2/v4l2_camera.cpp b/src/v4l2/v4l2_camera.cpp\n> index 50a4121cc93f..4da01a450dca 100644\n> --- a/src/v4l2/v4l2_camera.cpp\n> +++ b/src/v4l2/v4l2_camera.cpp\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_camera.h b/src/v4l2/v4l2_camera.h\n> index c969130fb37d..303eda44ca1d 100644\n> --- a/src/v4l2/v4l2_camera.h\n> +++ b/src/v4l2/v4l2_camera.h\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_camera_proxy.cpp b/src/v4l2/v4l2_camera_proxy.cpp\n> index 19e8f6d3b98d..3df4d42b59ea 100644\n> --- a/src/v4l2/v4l2_camera_proxy.cpp\n> +++ b/src/v4l2/v4l2_camera_proxy.cpp\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_camera_proxy.h b/src/v4l2/v4l2_camera_proxy.h\n> index e15b230d5f23..af9f9bbe83d5 100644\n> --- a/src/v4l2/v4l2_camera_proxy.h\n> +++ b/src/v4l2/v4l2_camera_proxy.h\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_compat.cpp b/src/v4l2/v4l2_compat.cpp\n> index a162037f6dc7..2a9a17629106 100644\n> --- a/src/v4l2/v4l2_compat.cpp\n> +++ b/src/v4l2/v4l2_compat.cpp\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_compat_manager.cpp b/src/v4l2/v4l2_compat_manager.cpp\n> index cd8ac0b8e819..2338a0ee1dd2 100644\n> --- a/src/v4l2/v4l2_compat_manager.cpp\n> +++ b/src/v4l2/v4l2_compat_manager.cpp\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_compat_manager.h b/src/v4l2/v4l2_compat_manager.h\n> index 872c7c3b10e8..14338a59deca 100644\n> --- a/src/v4l2/v4l2_compat_manager.h\n> +++ b/src/v4l2/v4l2_compat_manager.h\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n>","headers":{"Return-Path":"","Received":["from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 29F13603D6\n\tfor ;\n\tFri, 22 May 2020 15:59:16 +0200 (CEST)","from [192.168.0.20]\n\t(cpc89242-aztw30-2-0-cust488.18-1.cable.virginm.net [86.31.129.233])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 3D4B9B55;\n\tFri, 22 May 2020 15:59:15 +0200 (CEST)"],"Authentication-Results":"lancelot.ideasonboard.com; dkim=pass (1024-bit key; \n\tunprotected) header.d=ideasonboard.com\n\theader.i=@ideasonboard.com\n\theader.b=\"eLOd55bJ\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1590155955;\n\tbh=rbrIXElzg5ukf6mvZIFyjh0WXvQtl9+Cz1hw0PxGiu8=;\n\th=Reply-To:Subject:To:References:From:Date:In-Reply-To:From;\n\tb=eLOd55bJv4fNXLQFjNIY0WrBg8r/6qb3ktOB6AZjpwYrDClg9pvsSI2AzKuuYFi+m\n\t8ORnTDTsRw78PrgIiYRxjbOxlUvb56Srxs+YCRNbFmHb0OWiYZnc+83/6xFf0PSfk7\n\td9JdhND8/A9dP0V20Zld8T10txofBSAIMR+YBpWA=","Reply-To":"kieran.bingham@ideasonboard.com","To":"Laurent Pinchart ,\n\tlibcamera-devel@lists.libcamera.org","References":"<20200522110336.9081-1-laurent.pinchart@ideasonboard.com>","From":"Kieran Bingham ","Autocrypt":"addr=kieran.bingham@ideasonboard.com; keydata=\n\tmQINBFYE/WYBEACs1PwjMD9rgCu1hlIiUA1AXR4rv2v+BCLUq//vrX5S5bjzxKAryRf0uHat\n\tV/zwz6hiDrZuHUACDB7X8OaQcwhLaVlq6byfoBr25+hbZG7G3+5EUl9cQ7dQEdvNj6V6y/SC\n\trRanWfelwQThCHckbobWiQJfK9n7rYNcPMq9B8e9F020LFH7Kj6YmO95ewJGgLm+idg1Kb3C\n\tpotzWkXc1xmPzcQ1fvQMOfMwdS+4SNw4rY9f07Xb2K99rjMwZVDgESKIzhsDB5GY465sCsiQ\n\tcSAZRxqE49RTBq2+EQsbrQpIc8XiffAB8qexh5/QPzCmR4kJgCGeHIXBtgRj+nIkCJPZvZtf\n\tKr2EAbc6tgg6DkAEHJb+1okosV09+0+TXywYvtEop/WUOWQ+zo+Y/OBd+8Ptgt1pDRyOBzL8\n\tRXa8ZqRf0Mwg75D+dKntZeJHzPRJyrlfQokngAAs4PaFt6UfS+ypMAF37T6CeDArQC41V3ko\n\tlPn1yMsVD0p+6i3DPvA/GPIksDC4owjnzVX9kM8Zc5Cx+XoAN0w5Eqo4t6qEVbuettxx55gq\n\t8K8FieAjgjMSxngo/HST8TpFeqI5nVeq0/lqtBRQKumuIqDg+Bkr4L1V/PSB6XgQcOdhtd36\n\tOe9X9dXB8YSNt7VjOcO7BTmFn/Z8r92mSAfHXpb07YJWJosQOQARAQABtDBLaWVyYW4gQmlu\n\tZ2hhbSA8a2llcmFuLmJpbmdoYW1AaWRlYXNvbmJvYXJkLmNvbT6JAlcEEwEKAEECGwMFCwkI\n\tBwIGFQgJCgsCBBYCAwECHgECF4ACGQEWIQSQLdeYP70o/eNy1HqhHkZyEKRh/QUCXWTtygUJ\n\tCyJXZAAKCRChHkZyEKRh/f8dEACTDsbLN2nioNZMwyLuQRUAFcXNolDX48xcUXsWS2QjxaPm\n\tVsJx8Uy8aYkS85mdPBh0C83OovQR/OVbr8AxhGvYqBs3nQvbWuTl/+4od7DfK2VZOoKBAu5S\n\tQK2FYuUcikDqYcFWJ8DQnubxfE8dvzojHEkXw0sA4igINHDDFX3HJGZtLio+WpEFQtCbfTAG\n\tYZslasz1YZRbwEdSsmO3/kqy5eMnczlm8a21A3fKUo3g8oAZEFM+f4DUNzqIltg31OAB/kZS\n\tenKZQ/SWC8PmLg/ZXBrReYakxXtkP6w3FwMlzOlhGxqhIRNiAJfXJBaRhuUWzPOpEDE9q5YJ\n\tBmqQL2WJm1VSNNVxbXJHpaWMH1sA2R00vmvRrPXGwyIO0IPYeUYQa3gsy6k+En/aMQJd27dp\n\taScf9am9PFICPY5T4ppneeJLif2lyLojo0mcHOV+uyrds9XkLpp14GfTkeKPdPMrLLTsHRfH\n\tfA4I4OBpRrEPiGIZB/0im98MkGY/Mu6qxeZmYLCcgD6qz4idOvfgVOrNh+aA8HzIVR+RMW8H\n\tQGBN9f0E3kfwxuhl3omo6V7lDw8XOdmuWZNC9zPq1UfryVHANYbLGz9KJ4Aw6M+OgBC2JpkD\n\thXMdHUkC+d20dwXrwHTlrJi1YNp6rBc+xald3wsUPOZ5z8moTHUX/uPA/qhGsbkCDQRWBP1m\n\tARAAzijkb+Sau4hAncr1JjOY+KyFEdUNxRy+hqTJdJfaYihxyaj0Ee0P0zEi35CbE6lgU0Uz\n\ttih9fiUbSV3wfsWqg1Ut3/5rTKu7kLFp15kF7eqvV4uezXRD3Qu4yjv/rMmEJbbD4cTvGCYI\n\td6MDC417f7vK3hCbCVIZSp3GXxyC1LU+UQr3fFcOyCwmP9vDUR9JV0BSqHHxRDdpUXE26Dk6\n\tmhf0V1YkspE5St814ETXpEus2urZE5yJIUROlWPIL+hm3NEWfAP06vsQUyLvr/GtbOT79vXl\n\tEn1aulcYyu20dRRxhkQ6iILaURcxIAVJJKPi8dsoMnS8pB0QW12AHWuirPF0g6DiuUfPmrA5\n\tPKe56IGlpkjc8cO51lIxHkWTpCMWigRdPDexKX+Sb+W9QWK/0JjIc4t3KBaiG8O4yRX8ml2R\n\t+rxfAVKM6V769P/hWoRGdgUMgYHFpHGSgEt80OKK5HeUPy2cngDUXzwrqiM5Sz6Od0qw5pCk\n\tNlXqI0W/who0iSVM+8+RmyY0OEkxEcci7rRLsGnM15B5PjLJjh1f2ULYkv8s4SnDwMZ/kE04\n\t/UqCMK/KnX8pwXEMCjz0h6qWNpGwJ0/tYIgQJZh6bqkvBrDogAvuhf60Sogw+mH8b+PBlx1L\n\toeTK396wc+4c3BfiC6pNtUS5GpsPMMjYMk7kVvEAEQEAAYkCPAQYAQoAJgIbDBYhBJAt15g/\n\tvSj943LUeqEeRnIQpGH9BQJdizzIBQkLSKZiAAoJEKEeRnIQpGH9eYgQAJpjaWNgqNOnMTmD\n\tMJggbwjIotypzIXfhHNCeTkG7+qCDlSaBPclcPGYrTwCt0YWPU2TgGgJrVhYT20ierN8LUvj\n\t6qOPTd+Uk7NFzL65qkh80ZKNBFddx1AabQpSVQKbdcLb8OFs85kuSvFdgqZwgxA1vl4TFhNz\n\tPZ79NAmXLackAx3sOVFhk4WQaKRshCB7cSl+RIng5S/ThOBlwNlcKG7j7W2MC06BlTbdEkUp\n\tECzuuRBv8wX4OQl+hbWbB/VKIx5HKlLu1eypen/5lNVzSqMMIYkkZcjV2SWQyUGxSwq0O/sx\n\tS0A8/atCHUXOboUsn54qdxrVDaK+6jIAuo8JiRWctP16KjzUM7MO0/+4zllM8EY57rXrj48j\n\tsbEYX0YQnzaj+jO6kJtoZsIaYR7rMMq9aUAjyiaEZpmP1qF/2sYenDx0Fg2BSlLvLvXM0vU8\n\tpQk3kgDu7kb/7PRYrZvBsr21EIQoIjXbZxDz/o7z95frkP71EaICttZ6k9q5oxxA5WC6sTXc\n\tMW8zs8avFNuA9VpXt0YupJd2ijtZy2mpZNG02fFVXhIn4G807G7+9mhuC4XG5rKlBBUXTvPU\n\tAfYnB4JBDLmLzBFavQfvonSfbitgXwCG3vS+9HEwAjU30Bar1PEOmIbiAoMzuKeRm2LVpmq4\n\tWZw01QYHU/GUV/zHJSFk","Organization":"Ideas on Board","Message-ID":"<8a7e6597-fe6d-05a2-71fa-5b2a4d529c7c@ideasonboard.com>","Date":"Fri, 22 May 2020 14:59:12 +0100","User-Agent":"Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101\n\tThunderbird/68.7.0","MIME-Version":"1.0","In-Reply-To":"<20200522110336.9081-1-laurent.pinchart@ideasonboard.com>","Content-Type":"text/plain; charset=utf-8","Content-Language":"en-GB","Content-Transfer-Encoding":"7bit","Subject":"Re: [libcamera-devel] [PATCH] v4l2: Relicense V4L2 compatibility\n\tlayer under LGPL","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","X-List-Received-Date":"Fri, 22 May 2020 13:59:16 -0000"}},{"id":4890,"web_url":"https://patchwork.libcamera.org/comment/4890/","msgid":"<20200522205522.GB407885@localhost.localdomain>","date":"2020-05-22T20:55:22","subject":"Re: [libcamera-devel] [PATCH] v4l2: Relicense V4L2 compatibility\n\tlayer under LGPL","submitter":{"id":17,"url":"https://patchwork.libcamera.org/api/people/17/","name":"Paul Elder","email":"paul.elder@ideasonboard.com"},"content":"Hi Laurent,\n\nOn Fri, May 22, 2020 at 02:03:36PM +0300, Laurent Pinchart wrote:\n> The V4L2 compatibility layer is licensed under the GPL. It is compiled\n> as a binary separate from libcamera.so, and is loaded into the address\n> space of processes through LD_PRELOAD to intercept calls to the C\n> library.\n> \n> It is our understanding and intent that the GPL license doesn't\n> propagate to the binaries whose calls are intercepted, considering those\n> binaries are not derivative work of the V4L2 compatibility layer and are\n> not designed to be linked to the V4L2 compatibility layer. There is\n> however a possibly grey area if binaries are packaged with a shell\n> script wrapper that loads the V4L2 compatibility layer. This could lead\n> to license-related issues if such packaging is performed by Linux\n> distributions or system integrators.\n> \n> To clarify the intent and lift the doubts, relicense the V4L2\n> compatibility layer under the LGPL. The V4L2 compatibility layer code\n> itself still benefits from the license protection, while its usage with\n> third-party binaries is clearly allowed as intended.\n> \n> Signed-off-by: Laurent Pinchart \n\nLooks good to me.\n\nAcked-by: Paul Elder \n\n> ---\n> src/v4l2/v4l2_camera.cpp | 2 +-\n> src/v4l2/v4l2_camera.h | 2 +-\n> src/v4l2/v4l2_camera_proxy.cpp | 2 +-\n> src/v4l2/v4l2_camera_proxy.h | 2 +-\n> src/v4l2/v4l2_compat.cpp | 2 +-\n> src/v4l2/v4l2_compat_manager.cpp | 2 +-\n> src/v4l2/v4l2_compat_manager.h | 2 +-\n> 7 files changed, 7 insertions(+), 7 deletions(-)\n> \n> diff --git a/src/v4l2/v4l2_camera.cpp b/src/v4l2/v4l2_camera.cpp\n> index 50a4121cc93f..4da01a450dca 100644\n> --- a/src/v4l2/v4l2_camera.cpp\n> +++ b/src/v4l2/v4l2_camera.cpp\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_camera.h b/src/v4l2/v4l2_camera.h\n> index c969130fb37d..303eda44ca1d 100644\n> --- a/src/v4l2/v4l2_camera.h\n> +++ b/src/v4l2/v4l2_camera.h\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_camera_proxy.cpp b/src/v4l2/v4l2_camera_proxy.cpp\n> index 19e8f6d3b98d..3df4d42b59ea 100644\n> --- a/src/v4l2/v4l2_camera_proxy.cpp\n> +++ b/src/v4l2/v4l2_camera_proxy.cpp\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_camera_proxy.h b/src/v4l2/v4l2_camera_proxy.h\n> index e15b230d5f23..af9f9bbe83d5 100644\n> --- a/src/v4l2/v4l2_camera_proxy.h\n> +++ b/src/v4l2/v4l2_camera_proxy.h\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_compat.cpp b/src/v4l2/v4l2_compat.cpp\n> index a162037f6dc7..2a9a17629106 100644\n> --- a/src/v4l2/v4l2_compat.cpp\n> +++ b/src/v4l2/v4l2_compat.cpp\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_compat_manager.cpp b/src/v4l2/v4l2_compat_manager.cpp\n> index cd8ac0b8e819..2338a0ee1dd2 100644\n> --- a/src/v4l2/v4l2_compat_manager.cpp\n> +++ b/src/v4l2/v4l2_compat_manager.cpp\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_compat_manager.h b/src/v4l2/v4l2_compat_manager.h\n> index 872c7c3b10e8..14338a59deca 100644\n> --- a/src/v4l2/v4l2_compat_manager.h\n> +++ b/src/v4l2/v4l2_compat_manager.h\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> -- \n> Regards,\n> \n> Laurent Pinchart\n> \n> _______________________________________________\n> libcamera-devel mailing list\n> libcamera-devel@lists.libcamera.org\n> https://lists.libcamera.org/listinfo/libcamera-devel","headers":{"Return-Path":"","Received":["from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id F2ACC603D7\n\tfor ;\n\tFri, 22 May 2020 22:55:26 +0200 (CEST)","from localhost.localdomain (unknown [96.44.9.247])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 2E3E9B55;\n\tFri, 22 May 2020 22:55:26 +0200 (CEST)"],"Authentication-Results":"lancelot.ideasonboard.com; dkim=pass (1024-bit key; \n\tunprotected) header.d=ideasonboard.com\n\theader.i=@ideasonboard.com\n\theader.b=\"ALF5qGeA\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1590180926;\n\tbh=Nh53ZX9yehQI9PhadPNWmbAG9GqzCqalSMo+8qr3mlU=;\n\th=Date:From:To:Cc:Subject:References:In-Reply-To:From;\n\tb=ALF5qGeAIJJmS6owKJIwj6PRMX/QpwkVqvGz1yjyxQfXeUa0pIgtu+wRW2U9ntz7n\n\tO4awtqdzKfiB6Zw6XyIsVZlemP/oj7usPeoHRBC879ORz4xl4ZybI0LKDo4UM8l6tJ\n\t2uxVeE1EIDSfYULxT8ffRUhmhsJMFl+fWaN/Fnms=","Date":"Fri, 22 May 2020 16:55:22 -0400","From":"Paul Elder ","To":"Laurent Pinchart ","Cc":"libcamera-devel@lists.libcamera.org","Message-ID":"<20200522205522.GB407885@localhost.localdomain>","References":"<20200522110336.9081-1-laurent.pinchart@ideasonboard.com>","MIME-Version":"1.0","Content-Type":"text/plain; charset=us-ascii","Content-Disposition":"inline","In-Reply-To":"<20200522110336.9081-1-laurent.pinchart@ideasonboard.com>","Subject":"Re: [libcamera-devel] [PATCH] v4l2: Relicense V4L2 compatibility\n\tlayer under LGPL","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","X-List-Received-Date":"Fri, 22 May 2020 20:55:27 -0000"}},{"id":4913,"web_url":"https://patchwork.libcamera.org/comment/4913/","msgid":"<20200527160150.GA1755621@oden.dyn.berto.se>","date":"2020-05-27T16:01:50","subject":"Re: [libcamera-devel] [PATCH] v4l2: Relicense V4L2 compatibility\n\tlayer under LGPL","submitter":{"id":5,"url":"https://patchwork.libcamera.org/api/people/5/","name":"Niklas Söderlund","email":"niklas.soderlund@ragnatech.se"},"content":"Hi Laurent,\n\nThanks for pushing thru with these issues.\n\nOn 2020-05-22 14:03:36 +0300, Laurent Pinchart wrote:\n> The V4L2 compatibility layer is licensed under the GPL. It is compiled\n> as a binary separate from libcamera.so, and is loaded into the address\n> space of processes through LD_PRELOAD to intercept calls to the C\n> library.\n> \n> It is our understanding and intent that the GPL license doesn't\n> propagate to the binaries whose calls are intercepted, considering those\n> binaries are not derivative work of the V4L2 compatibility layer and are\n> not designed to be linked to the V4L2 compatibility layer. There is\n> however a possibly grey area if binaries are packaged with a shell\n> script wrapper that loads the V4L2 compatibility layer. This could lead\n> to license-related issues if such packaging is performed by Linux\n> distributions or system integrators.\n> \n> To clarify the intent and lift the doubts, relicense the V4L2\n> compatibility layer under the LGPL. The V4L2 compatibility layer code\n> itself still benefits from the license protection, while its usage with\n> third-party binaries is clearly allowed as intended.\n> \n> Signed-off-by: Laurent Pinchart \n\nAcked-by: Niklas Söderlund \n\n> ---\n> src/v4l2/v4l2_camera.cpp | 2 +-\n> src/v4l2/v4l2_camera.h | 2 +-\n> src/v4l2/v4l2_camera_proxy.cpp | 2 +-\n> src/v4l2/v4l2_camera_proxy.h | 2 +-\n> src/v4l2/v4l2_compat.cpp | 2 +-\n> src/v4l2/v4l2_compat_manager.cpp | 2 +-\n> src/v4l2/v4l2_compat_manager.h | 2 +-\n> 7 files changed, 7 insertions(+), 7 deletions(-)\n> \n> diff --git a/src/v4l2/v4l2_camera.cpp b/src/v4l2/v4l2_camera.cpp\n> index 50a4121cc93f..4da01a450dca 100644\n> --- a/src/v4l2/v4l2_camera.cpp\n> +++ b/src/v4l2/v4l2_camera.cpp\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_camera.h b/src/v4l2/v4l2_camera.h\n> index c969130fb37d..303eda44ca1d 100644\n> --- a/src/v4l2/v4l2_camera.h\n> +++ b/src/v4l2/v4l2_camera.h\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_camera_proxy.cpp b/src/v4l2/v4l2_camera_proxy.cpp\n> index 19e8f6d3b98d..3df4d42b59ea 100644\n> --- a/src/v4l2/v4l2_camera_proxy.cpp\n> +++ b/src/v4l2/v4l2_camera_proxy.cpp\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_camera_proxy.h b/src/v4l2/v4l2_camera_proxy.h\n> index e15b230d5f23..af9f9bbe83d5 100644\n> --- a/src/v4l2/v4l2_camera_proxy.h\n> +++ b/src/v4l2/v4l2_camera_proxy.h\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_compat.cpp b/src/v4l2/v4l2_compat.cpp\n> index a162037f6dc7..2a9a17629106 100644\n> --- a/src/v4l2/v4l2_compat.cpp\n> +++ b/src/v4l2/v4l2_compat.cpp\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_compat_manager.cpp b/src/v4l2/v4l2_compat_manager.cpp\n> index cd8ac0b8e819..2338a0ee1dd2 100644\n> --- a/src/v4l2/v4l2_compat_manager.cpp\n> +++ b/src/v4l2/v4l2_compat_manager.cpp\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> diff --git a/src/v4l2/v4l2_compat_manager.h b/src/v4l2/v4l2_compat_manager.h\n> index 872c7c3b10e8..14338a59deca 100644\n> --- a/src/v4l2/v4l2_compat_manager.h\n> +++ b/src/v4l2/v4l2_compat_manager.h\n> @@ -1,4 +1,4 @@\n> -/* SPDX-License-Identifier: GPL-2.0-or-later */\n> +/* SPDX-License-Identifier: LGPL-2.1-or-later */\n> /*\n> * Copyright (C) 2019, Google Inc.\n> *\n> -- \n> Regards,\n> \n> Laurent Pinchart\n> \n> _______________________________________________\n> libcamera-devel mailing list\n> libcamera-devel@lists.libcamera.org\n> https://lists.libcamera.org/listinfo/libcamera-devel","headers":{"Return-Path":"","Received":["from mail-lj1-x241.google.com (mail-lj1-x241.google.com\n\t[IPv6:2a00:1450:4864:20::241])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 67DFE603D1\n\tfor ;\n\tWed, 27 May 2020 18:02:00 +0200 (CEST)","by mail-lj1-x241.google.com with SMTP id z6so29539921ljm.13\n\tfor ;\n\tWed, 27 May 2020 09:02:00 -0700 (PDT)","from localhost (h-209-203.A463.priv.bahnhof.se. 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