import hudson.model.*
class StreamGobbler implements Runnable {
private final InputStream is;
private final PrintStream os;
StreamGobbler(InputStream is, PrintStream os) {
this.is = is;
this.os = os;
}
private void handleLine(String line)
{
// put your custom handling here.
println line
}
public void run()
{
try
{
def line = ""
int c;
while ((c = is.read()) != -1)
{
line += (char)c
if (c == '\n')
{
os.print(">>> ")
os.print(line)
handleLine(line)
line = "";
}
}
}
catch (IOException x)
{
// Handle error
}
}
}
myCommand = "ping 127.0.0.1 -n 6"
println myCommand
def proc = myCommand.execute();
// Any error message?
Thread errorGobbler = new Thread(new StreamGobbler(proc.getErrorStream(), System.err));
// Any output?
Thread outputGobbler = new Thread(new StreamGobbler(proc.getInputStream(), System.out));
errorGobbler.start();
outputGobbler.start();
// Any error?
int exitVal = proc.waitFor();
errorGobbler.join(); // Handle condition where the
outputGobbler.join(); // process ends before the threads finishModification taken from https://wiki.sei.cmu.edu/confluence/display/java/FIO07-J.+Do+not+let+external+processes+block+on+IO+buffers
A couple of days ago I’ve been hosting a karaoke event and rediscovered 
Feel free to download, use, extend or port it to other platforms. Get it here.
