Thanks for this information,

But, can we do the same thing using a programming lanaguage such as C, C++
or Java.
$ cat /sys/bus/usb/devices/1-4/idProduct : Is just a shell command, But if I
want to develop a Graphical Interface. How can I obtain this information ?

Thanks in advance.

-----Original Message-----
From: Alan Stern [mailto:[EMAIL PROTECTED] 
Sent: Tuesday, May 16, 2006 4:54 PM
To: Abdelkader YEDDES
Cc: [email protected]
Subject: Re: [Linux-usb-users] API that can read the PID / VID


On Fri, 12 May 2006, Abdelkader YEDDES wrote:

> Hello,
> 
> I'm new in USB under linux, I worked under windows many USB based 
> application. So, all Linux API are new for me. I 'd like to know if 
> there are any API that can read the PID / VID , Serial Number. If not, 
> How can access to the USB device under Linux?

Yes, there is such an API.

For example, right now I have a USB flash drive plugged into my computer.  
Its pathname is 1-4 (i.e., it is plugged into port 4 of USB controller 1).  
The information you want is available as follows:

$ cat /sys/bus/usb/devices/1-4/idProduct
1400
$ cat /sys/bus/usb/devices/1-4/idVendor 
0d7d
$ cat /sys/bus/usb/devices/1-4/serial  
07460E030679

More general access to USB devices can be programmed using libusb.

Alan Stern



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