Read from another process' output stream

Question

i wanted to read the output-stream of a c-Application in my Java program. iremoted (available here: http://osxbook.com/software/iremoted/download/iremoted.c) is a C-App

Answer 1

stdout is buffered and it's not automatically flushed if you are not writing to screen. Add:

fflush(stdout);

after:

printf("%#lx %s\n", (UInt32)event.elementCookie,
    (event.value == 0) ? "depressed" : "pressed");

Answer 2

iremoted is likely writing to stderr if a hello world program works. You would want the error stream in that case. I'm not sure how this works for your hello world case - I think you're doing the wrong thing here:

 new InputStreamReader(process.getInputStream()); 

should be

 new InputStreamReader(process.getOutputStream());

or

 new InputStreamReader(process.getErrorStream());