diff --git a/gunicorn/arbiter.py b/gunicorn/arbiter.py
index 88a7e1cb..e78612ba 100644
--- a/gunicorn/arbiter.py
+++ b/gunicorn/arbiter.py
@@ -95,15 +95,13 @@ class Arbiter(object):
     def valid_pidfile(self, path):
         try:
             with open(path, "r") as f:
-                try:
-                    pid = int(f.read())
-                except:
-                    return None
-                if pid <= 0: return None
+                wpid = int(f.read() or 0)
+
+                if wpid <= 0: return None
      
                 try:
-                    os.kill(pid, 0)
-                    return pid
+                    os.kill(wpid, 0)
+                    return wpid
                 except OSError, e:
                     if e[0] == errno.ESRCH:
                         return
@@ -144,8 +142,7 @@ class Arbiter(object):
                     self.log.error("should be a non GUNICORN environnement")
                 else:
                     raise
-                    
-        
+
         for i in range(5):
             try:
                 sock = self.init_socket(addr)
@@ -224,6 +221,7 @@ class Arbiter(object):
         
     def handle_chld(self, sig, frame):
         self.wakeup()
+        self.reap_workers()
         
     def handle_hup(self):
         self.log.info("Master hang up.")
@@ -297,6 +295,7 @@ class Arbiter(object):
             self.reap_workers()
         self.kill_workers(signal.SIGKILL)
         
+        
     def reexec(self):
         self.reexec_pid = os.fork()
         if self.reexec_pid == 0:
@@ -360,16 +359,14 @@ class Arbiter(object):
                 self.log.exception("Exception in worker process.")
                 sys.exit(-1)
             finally:
-                worker.tmp.close()
                 self.log.info("Worker %s exiting." % worker_pid)
-                os._exit(127)
 
     def kill_workers(self, sig):
         for pid in self.WORKERS.keys():
             self.kill_worker(pid, sig)
         
     def kill_worker(self, pid, sig):
-        
+        self.log.info("ici")
         try:
             os.kill(pid, sig)
         except OSError, e:
diff --git a/gunicorn/main.py b/gunicorn/main.py
index 1f85be62..643dd1cd 100644
--- a/gunicorn/main.py
+++ b/gunicorn/main.py
@@ -56,7 +56,6 @@ def configure_logging(opts):
     for h in handlers:
         h.setFormatter(logging.Formatter("%(levelname)s %(message)s"))
         logger.addHandler(h)
-    return logger
         
 def daemonize(logger):
     if not 'GUNICORN_FD' in os.environ:
@@ -85,7 +84,7 @@ def daemonize(logger):
 def main(usage, get_app):
     parser = op.OptionParser(usage=usage, option_list=options())
     opts, args = parser.parse_args()
-    logger = configure_logging(opts)
+    configure_logging(opts)
 
     app = get_app(parser, opts, args)
     workers = opts.workers or 1
@@ -110,12 +109,14 @@ def main(usage, get_app):
     arbiter = Arbiter((host,port), workers, app, 
                     **kwargs)
     if opts.daemon:
-        daemonize(logger)
+        daemonize()
+    else:
+        os.setpgrp()
     arbiter.run()
     
 def paste_server(app, global_conf=None, host="127.0.0.1", port=None, 
             *args, **kwargs):
-    logger = configure_logging(opts)
+    configure_logging(opts)
     if not port:
         if ':' in host:
             host, port = host.split(':', 1)
@@ -147,5 +148,7 @@ def paste_server(app, global_conf=None, host="127.0.0.1", port=None,
 
     arbiter = Arbiter(bind_addr, workers, app, **kwargs)
     if daemon == "true":
-           daemonize(logger)
+        daemonize()
+    else:
+        os.setpgrp()
     arbiter.run()
\ No newline at end of file
diff --git a/gunicorn/worker.py b/gunicorn/worker.py
index 00c2a7fe..d877ad8c 100644
--- a/gunicorn/worker.py
+++ b/gunicorn/worker.py
@@ -22,7 +22,7 @@ class Worker(object):
 
     SIGNALS = map(
         lambda x: getattr(signal, "SIG%s" % x),
-        "HUP QUIT INT TERM TTIN TTOU USR1".split()
+        "HUP QUIT INT TERM TTIN TTOU USR1 USR2 WINCH".split()
     )
     
     PIPE = []
@@ -50,7 +50,6 @@ class Worker(object):
         
         # prevent inherientence
         util.close_on_exec(self.socket)
-        self.socket.setblocking(0)
         util.close_on_exec(fd)
         
         self.address = self.socket.getsockname()
@@ -62,18 +61,18 @@ class Worker(object):
         signal.signal(signal.SIGTERM, self.handle_exit)
         signal.signal(signal.SIGINT, self.handle_exit)
         
-    def handle_usr1(self, *args):
+    def handle_usr1(self, sig, frame):
         self.nr = -65536; 
         try:
             map(lambda p: p.close(), self.PIPE)
         except:
             pass
             
-    def handle_quit(self, *args):
+    def handle_quit(self, sig, frame):
         self.alive = False
 
     def handle_exit(self, sig, frame):
-        os._exit(0)
+        sys.exit(0)
         
     def _fchmod(self, mode):
         if getattr(os, 'fchmod', None):
@@ -112,7 +111,7 @@ class Worker(object):
                 if self.nr == 0: break
                 
             if self.ppid != os.getppid():
-                break
+                return
                 
             while self.alive:
                 spinner = (spinner+1) % 2
@@ -120,16 +119,18 @@ class Worker(object):
                 try:
                     ret = select.select([self.socket], [], self.PIPE, 
                                     self.timeout)
-                    if ret[0]:
-                        break
+                    if ret[0]: break
                 except select.error, e:
                     if e[0] == errno.EINTR:
                         break
+                    if e[0] == errno.EBADF:
+                        if nr >= 0:
+                            return
                     raise
                     
             spinner = (spinner+1) % 2
-            self._fchmod(spinner)
-            
+            self._fchmod(spinner) 
+        sys.exit(0)   
 
     def handle(self, client, addr):
         util.close_on_exec(client)