Getting an exit value from a program called thru a shell script

Question

how do i get the correct exit value always from a program called thru a shell script
the getExitValue of the process works fine someitmes but not always ...
Ex: write a pgm which sleeps for 5 secs & returns with exit(100).try to invoke this thru a script & try to run this script from Runtime.getRuntime.exec(..)
...the exit value is not same as 100.(it works if the sleep is not given though !!)
can nebody help??

Answer 1

ive done that ...see the sample code for ex..
public void execute()
               try{
                         Process program=Runtime.getRuntime().exec(cmd);
                         printOutput(program.getInputStream());
                         try
                              program.waitFor();
                         catch(InterruptedException e)
                              System.out.println("Command Interrupted: " + e);
          System.out.println("Error status : "+program.exitValue());
                    catch(SecurityException e)
                         System.out.println("Error executing program "+e);
                    catch(IOException e)
                         System.out.println("Error executing program "+e);
....