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POHow do I use udev to find info about inserted video media (e.g. DVDs)
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  1. POHow do I use udev to find info about inserted video media (e.g. DVDs)
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    copied!<p>I'm trying to port an application from using HAL to using pure udev. It is written in python and will use the gudev library, though I would love to see examples in any language. I'm able to get all attached video devices (such as cameras) via:</p> <pre><code>import gudev client = gudev.Client(["video4linux"]) for device in client.get_devices(): print device.get_sysfs_attr("name"), device.get_device_name() </code></pre> <p>This prints out something like:</p> <pre><code>USB2.0 UVC WebCam /dev/video0 </code></pre> <p>I am also able to get a list of block devices, but how can I:</p> <ol> <li><p>Tell if it is a CD/DVD drive?</p></li> <li><p>Tell if media is currently inserted if the drive supports removable media?</p></li> <li><p>Tell what the name/label of the media is (e.g. FUTURAMAS1 for a DVD)?</p></li> </ol> <p>The original code I am trying to port over is located at <a href="http://github.com/danielgtaylor/arista/blob/045a4d48ebfda44bc5d0609618ff795604ee134f/arista/inputs.py" rel="nofollow noreferrer">http://github.com/danielgtaylor/arista/blob/045a4d48ebfda44bc5d0609618ff795604ee134f/arista/inputs.py</a></p> <p>Any and all help would be greatly appreciated!</p> <hr/> <p>Update: adding answer below.</p> <pre><code>import gudev client = gudev.Client(['block']) for device in client.query_by_subsystem("block"): if device.has_property("ID_CDROM"): print "Found CD/DVD drive at %s" % device.get_device_file() if device.has_property("ID_FS_LABEL"): print "Found disc: %s" % device.get_property("ID_FS_LABEL") elif device.has_property("ID_FS_TYPE"): print "Found disc" else: print "No disc" </code></pre> <p>The code above will output data like:</p> <pre><code>Found CD/DVD drive at /dev/sr0 Found disc: Ubuntu_10.04_i386 </code></pre> <p>Thanks for the help!</p>
 

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