Re: [Libusb-devel] Find specific USB device based on udev info

[Michael B. <mi...@m-...>]

On 06.07.2011 20:59, Alan Stern wrote:
> On Fri, 1 Jul 2011, Pete Batard wrote:
>
>> On 2011.07.01 15:57, Alan Stern wrote:
>>> So far not much has been written (I think part of this was implemented
>>> in the Windows port of libusb).
>>
>> The following have been in my branch for some time (libusb.h [1], line 890):
>>
>> uint8_t LIBUSB_CALL libusb_get_port_number(libusb_device *dev);
>> libusb_device * LIBUSB_CALL libusb_get_parent(libusb_device *dev);
>> int LIBUSB_CALL libusb_get_port_path(libusb_context *ctx, libusb_device
>> *dev, uint8_t* path, uint8_t path_length);
>>
>> Currently, these calls will return an error for OSX and Linux, but
>> should work on Windows. As a matter of fact, the xusb sample will
>> automatically display some topology information when ran on Windows. eg:
>>
>>     bus: 7, port path from HCD: 4->4->1
>>
>> If anybody wants to send a Linux or Mac implementation for the calls
>> above, I'd be happy to include it in my branch.
>
> Okay, I have an implementation for the Linux backend.  There's also a
> fix for the xusb program.  Two patches follow.

That is good news. Having this native in libusb will simplify my code *a 
lot*. Looking forward for the first release including it :-)

Best regards
Michael