experimental hack to work around the fact that windows cant track its…

… children

tools/roslaunch/src/roslaunch/nodeprocess.py

@@ -280,7 +280,18 @@ def start(self):
             _logger.info("process[%s]: cwd will be [%s]", self.name, cwd)
 
             try:
-                self.popen = subprocess.Popen(self.args, cwd=cwd, stdout=logfileout, stderr=logfileerr, env=full_env, close_fds=True, preexec_fn=os.setsid)
+                preexec_function = os.setsid
+                close_file_descriptor=True
+            except AttributeError:
+                # No way to manage these on windows without setsid and close_fds
+                # This is not a real solution, we need a better way.
+                # setsid is there so we can kill children, without it, they are left as zombies
+                # so like this, windows won't be able to kill children that have been forked off 
+                # by programs on their own
+                preexec_function = None
+                close_file_descriptor=False
+            try:
+                self.popen = subprocess.Popen(self.args, cwd=cwd, stdout=logfileout, stderr=logfileerr, env=full_env, close_fds=close_file_descriptor, preexec_fn=preexec_function)
             except OSError, (errno, msg):
                 self.started = True # must set so is_alive state is correct
                 _logger.error("OSError(%d, %s)", errno, msg)