public static String oneLine(String cmd)
    {

        Runtime run = Runtime.getRuntime();
        Process pr;
        try
        {
            pr = run.exec(cmd);
            pr.waitFor();
            BufferedReader buf = new BufferedReader(new InputStreamReader(pr.getInputStream()));
            String line = "";
            while ((line = buf.readLine()) != null)
            {
                return line;
            }

        } catch (IOException e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (InterruptedException e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return null;
    }