AHHHHH! I just dont get it.....

Question

Hello, All! Is there anyone out there with a sample piece of code that would explain how in the heck to execute a local unix command?!? I realize that i should be using Runtime.exec(String), but its just not working for me...help?!?!?
Thanks!

Answer 1

I just posted this code somewhere else, it might help you. I verifies if the user "roort" is logged in:
import java.io.*;
public class CheckLogin  {
   public CheckLogin() {
      super();
   public static void main(String arg[]) {
      try {
         Runtime rt= Runtime.getRuntime();
         Process p= rt.exec("who -q | grep root");
         try {
            int i= p.waitFor();
            if(i == 0) {
               BufferedReader br= new BufferedReader(new InputStreamReader(p.getInputStream()));
               System.out.println("User: "+ br.readLine());
            } else {
               System.out.println("Process did not ran.");
         } catch (InterruptedException iex) {
            System.err.println("Error: "+ iex.getMessage());
      } catch(IOException ioex) {
         System.err.println("Error: "+ ioex.getMessage());
}