Mouse scroll capture (GUI independent under linux)

Hi everyone! I have a problem, I have an app that already capture the mouse movements in not graphical mode, now I badly need it to capture scrolling.

The program was written by a guy that no longer works here, he managed to read the mouse by reading the file /dev/input/mouse0

Code:

---

public byte[] readMovementPacket() throws IOException
    {
        byte[] barray = new byte[3];
        file.read(barray);
        return barray;
    }

---

then with the byte array he composes the information:

Code:

---

byte[] packet = mouse.readMovementPacket();
                if(packet != null)
                {                   
                    int b7, b6, b5, b4, b3, b2, b1, b0;
                    b0 = (packet[0]    ) & 1;
                    b1 = (packet[0] >> 1) & 1;
                    b2 = (packet[0] >> 2) & 1;
                    b3 = (packet[0] >> 3) & 1;
                    b4 = (packet[0] >> 4) & 1;
                    b5 = (packet[0] >> 5) & 1;
                    b6 = (packet[0] >> 6) & 1;
                    b7 = (packet[0] >> 7) & 1;
                   
                 
                    int x, y,z;
                    x = packet[1];
                    y = packet[2];
                  }

---

Well, now I need to extract scrolling

If anybody knows how to do it, or can redirect me to some place where to find how to do it I'll be very happy ;)

This is not really a Java question - rather its about the format of the contents of /dev/input/mouse0. A brief description of the ImPS/2 format is given in the last post of this thread.