From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Richter Date: Sun, 27 Nov 2005 13:55:26 +0000 Subject: Re: Hotplug, 1394, and security Message-Id: <4389BACE.6010308@s5r6.in-berlin.de> List-Id: References: <20051125213209.GZ20781@conscoop.ottawa.on.ca> In-Reply-To: <20051125213209.GZ20781@conscoop.ottawa.on.ca> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-hotplug@vger.kernel.org Kurt Konolige wrote: > The 1394 Trade Association puts out something called the "IIDC > 1394-based Camera Specification", which most folks just call the DCAM > spec. You control the camera by reading and writing into its 1394 > address space, which is structured according to this spec. I think IEC > 61883 defines a wrapper structure of iso packets that hold video; > devices with uncompressed video typically don't use it. > > At any rate, user space control over the camera hinges on writing to > /dev/raw1394, to set camera parameters. I frequently have to change the > default /dev/raw1394 access controls on new Linux systems, to enable > DCAM controls. It would be a pain if this were restricted to root access. If I understand Jody's proposal correctly, libraw could transparently try to send those requests through the extra /dev/bus/ieee1394/${bus}/${nodeID} devices if available. An udev helper should become aware of IIDC compliant units and adjust node permissions according to local policy, on the fly. -- Stefan Richter -===-=-=-= =-= =-= http://arcgraph.de/sr/ ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_idv37&alloc_id865&op=click _______________________________________________ Linux-hotplug-devel mailing list http://linux-hotplug.sourceforge.net Linux-hotplug-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-hotplug-devel