I have a java command line program that runs another linux binary
executable as one of it's functions.

The binary runs fine. Here is how it gets done.

I have a collection of environment variables set in a an
array I use at runtime along with a command line string.
Call runtime.exec.
-------------------------------------------
// Set up the runtime.
Runtime runtime = Runtime.getRuntime();
try {

   // Convert ArrayList to String Array for Process.
   envArray = (String[])envA.toArray(new String[0]);

   // ---- RUN THE SIM ----
   Process p = runtime.exec(cmdine, envArray);

   // Using a buffered reader now. Seems to work better.
   BufferedReader input = new BufferedReader(
   new InputStreamReader(p.getInputStream()));
   while ((line = input.readLine()) != null) {
      System.out.println(line);
   }

   int exitStatus = p.waitFor();
   // Might need to change this to just the number.
   System.out.println("Exit Value: " + exitStatus);

   if (exitStatus == 1) { // Error in runtime.
      System.out.println("\nERROR:");
      BufferedReader errorout = new BufferedReader(
      new InputStreamReader(p.getErrorStream()));
      while ((line = input.readLine()) != null) {
         System.out.println(line);
      }
   }// if (exitStatus == 1)

} catch (Exception e) {
   System.out.println("Process P Exception = " + e.getMessage());
}
-------------------------------------------

This all works fine. The problem I have is the binary has it's own
command line interface so when a control-C is entered while the binary
is running it will stop (not exit) what it is doing at that point so
you can interact with program through it's own command line (set
variables, change parameters, step, etc).

What happens when I run the binary under the java app the control-C
exits the program rather than just stop at the programs internal
command line interface.

I'm thinking the Java program sees the control-C and takes that as
an exit instead of letting the binary see it. If that's true I'm not
sure how to pass on the control-C. Intercept through the Stream?
Then what?

Any ideas on how I can get the control-C to behave the correct way?

Thanks in advance,

Mick