lib/rb-fsevent/fsevent.rb in rb-fsevent-0.9.5 vs lib/rb-fsevent/fsevent.rb in rb-fsevent-0.9.6

@@ -50,15 +50,24 @@
     stop
   end
 
   def stop
     unless @pipe.nil?
-      Process.kill('KILL', @pipe.pid)
+      Process.kill('KILL', @pipe.pid) if process_running?(@pipe.pid)
       @pipe.close
     end
   rescue IOError
   ensure
     @running = false
+  end
+
+  def process_running?(pid)
+    begin
+      Process.kill(0, pid)
+      true
+    rescue Errno::ESRCH
+      false
+    end
   end
 
   if RUBY_VERSION < '1.9'
     def open_pipe
       IO.popen("'#{self.class.watcher_path}' #{options_string} #{shellescaped_paths}")