Executing Cygwin through JAVA

Question

Hey guys,
I am having a bit of a problem here trying to figure out how to execute cygwin and run cygwin commands through java. So far I have this code below; I ultimately want to make cygwin run an egrep command, but for now I am trying ls -la as a test. I am pretty sure that I need some way of calling the cygwin.bat or bash.exe files, but I am not sure how or where to do this. Thanks for all your input!
         try
              String cmd = "ls -la";
                   Runtime rt = Runtime.getRuntime();
                  Process proc = rt.exec(cmd);
                  proc.waitFor();
                  BufferedReader buf = new BufferedReader(new InputStreamReader(proc.getInputStream()));
                  String line = "";
                   while ((line=buf.readLine())!=null) {
                        System.out.println(line);
         catch (Throwable t)
              t.printStackTrace();

Answer 1

And what does that code do? Do you have any problems?
Generally, whenever you use exec(), you must read [_When Runtime.exec() won't_|http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html] (yes, even f you already read it. Read it again!)
The mistakes explained in there are so common, that the article (all 4 pages of it) should be part of the documentation.
Also: implementing this correctly is possibly more work than re-implementing the feature of egrep that you want. Java has regular expression support and reading text files is not too hard, so it should be quite easy to implement that.