get_description

Get a string describing the device which is suitable as a description of the device for the end user.

The returned string should be freed with g_free when no longer needed.

The format positional parameters are the following: 1. %s manufacturer 2. %s product 3. %s descriptor (a [vendor_id:product_id] string) 4. %d bus 5. %d address

(the default format string is "%s %s %s at %d-%d")

Parameters:

this	UsbDevice to get the description of
format	an optional printf format string with positional parameters

Returns:

a newly-allocated string holding the description, or null if failed