Hal and device identification

[Mike McGrath]

I've got a usb disk, hal finds it and identifies it as a JUMPDRIVE 
ELITE.  This value is not in /usr/share/hwdata/usb.ids.  My question is 
where did hal get this info, and how can I retrieve it given only the 
vendor id and device id (5dc:a400)
------------------------------------------------------------
udi = 
'/org/freedesktop/Hal/devices/usb_device_5dc_a400_00000000000000000001'
  info.udi = 
'/org/freedesktop/Hal/devices/usb_device_5dc_a400_00000000000000000001'  
(string)
  linux.subsystem = 'usb'  (string)
  linux.hotplug_type = 1  (0x1)  (int)
  usb_device.bus_number = 5  (0x5)  (int)
  usb_device.can_wake_up = false  (bool)
  usb_device.is_self_powered = false  (bool)
  usb_device.version_bcd = 512  (0x200)  (int)
  usb_device.speed_bcd = 294912  (0x48000)  (int)
  usb_device.serial = '00000000000000000001'  (string)
  usb_device.linux.device_number = 9  (0x9)  (int)
  usb_device.num_ports = 0  (0x0)  (int)
  usb_device.max_power = 100  (0x64)  (int)
  usb_device.device_revision_bcd = 256  (0x100)  (int)
  info.product = 'JUMPDRIVE ELITE'  (string)
  usb_device.product = 'JUMPDRIVE ELITE'  (string)
  info.vendor = 'Lexar Media, Inc.'  (string)
  usb_device.vendor = 'Lexar Media, Inc.'  (string)
  usb_device.product_id = 41984  (0xa400)  (int)
  usb_device.vendor_id = 1500  (0x5dc)  (int)
  usb_device.device_protocol = 0  (0x0)  (int)
  usb_device.device_subclass = 0  (0x0)  (int)
  usb_device.device_class = 0  (0x0)  (int)
  usb_device.num_interfaces = 1  (0x1)  (int)
  usb_device.num_configurations = 1  (0x1)  (int)
  usb_device.configuration_value = 1  (0x1)  (int)
  usb_device.linux.sysfs_path = 
'/sys/devices/pci0000:00/0000:00:1d.7/usb5/5-4'  (string)
  info.linux.driver = 'usb'  (string)
  info.bus = 'usb_device'  (string)
  info.parent = 
'/org/freedesktop/Hal/devices/usb_device_0_0_0000_00_1d_7'  (string)
  linux.sysfs_path_device = 
'/sys/devices/pci0000:00/0000:00:1d.7/usb5/5-4'  (string)



    -Mike

[Dave Jones]

On Tue, Mar 06, 2007 at 10:21:23PM -0600, Mike McGrath wrote:
>  I've got a usb disk, hal finds it and identifies it as a
> JUMPDRIVE 
>  ELITE.  This value is not in /usr/share/hwdata/usb.ids.  My question is 
>  where did hal get this info, and how can I retrieve it given only the 
>  vendor id and device id (5dc:a400) 
It's the 'label' of the disk.  man mlabel for more info.

	Dave

-- 
http://www.codemonkey.org.uk

[David Zeuthen]

On Tue, 2007-03-06 at 22:21 -0600, Mike McGrath wrote:
>  I've got a usb disk, hal finds it and identifies it as a
> JUMPDRIVE 
>  ELITE.  This value is not in /usr/share/hwdata/usb.ids.  My question is 
>  where did hal get this info, and how can I retrieve it given only the 
>  vendor id and device id (5dc:a400) 
The kernel may exports vendor/product names in sysfs (the files are
called 'manufacturer' and 'product') that is retrieved as part of the
probing (see section 9.6.1 of the USB 2.0 spec). If these files are not
available, HAL consults the usb.ids file. Btw, in the future it's better
to ask such questions on hal(a)lists.freedesktop.org

    David

[David Zeuthen]

On Wed, 2007-03-07 at 00:29 -0500, Dave Jones wrote:
>  On Tue, Mar 06, 2007 at 10:21:23PM -0600, Mike McGrath wrote:
>   > I've got a usb disk, hal finds it and identifies it as a JUMPDRIVE 
>   > ELITE.  This value is not in /usr/share/hwdata/usb.ids.  My question is 
>   > where did hal get this info, and how can I retrieve it given only the 
>   > vendor id and device id (5dc:a400)
>  
>  It's the 'label' of the disk.   
Actually, for that snippet it's not - what's shown is the properties for
the USB device... the block device, for which we do probe for the file
system, is much lower in the stack on the "other" side of the SCSI glue.

>  man mlabel for more info. 
/lib/udev/vol_id forever!

     David