Sending control codes to native program

Question

Hello,
I execute a native application with Runtime.getRuntime().exec(), but the application does not return from proc.waitFor(). I feed the application from stdin. Other applications (e.g. cat) runs fine, so believe I have to terminate the input with a CTRL+D or something like this, but it does not work. How can I send a control code to the process?
I tried:
write('\u0004')
write('\u0003')
But why returns:
write('\u000D');
write('\u000A);
an error in the IDE?
Process proc = Runtime.getRuntime().exec(cmd+"\u0004");
BufferedInputStream bufferedIn = new BufferedInputStream(in);
outStream = new BufferedOutputStream(proc.getOutputStream());
errorStream = new BufferedReader(new InputStreamReader(proc
                         .getErrorStream()));
inStream = new BufferedReader(new InputStreamReader(proc
                         .getInputStream()));
int b;
while ((b = bufferedIn.read()) != -1) {
     outStream.write(b);
proc.waitFor();
Thanks, Karsten

Answer 1

Does not help. I flush and close the stream. Same result.
The program which does not work is a C program and waits until feof() says it. So, I also thought closing the stream would help to get an EOF, but it doesn't.
Message was edited by:
widerstand
Message was edited by:
widerstand