Is there a way to get feedback from a process in XUL?

I'm starting to develop an extension which must interact with an external application. I开发者_开发百科 can run the external application as described here, but I do not see a way to get any feedback. The only information I get is the exit status, while I need to read the application output, as it would appear on a terminal (stdout). Is there a way to do this?

After running the nsiProcess, loop while checking the isRunning attribute. When it stops running, check the exitValue attribute. As I understand it, this may behave differently on different platforms, but I did use it successfully on Windows.