print() can deadlock 👁👄👁

copyparty/broker_mp.py

@@ -150,6 +150,7 @@ class BrokerMp(object):
 
             if msg != last:
                 last = msg
-                print(msg)
+                with self.hub.log_mutex:
+                    print(msg)
 
             time.sleep(0.1)

copyparty/httpcli.py

@@ -614,7 +614,7 @@ class HttpCli(object):
         abspath = vn.canonical(rem)
 
         if not os.path.exists(fsenc(abspath)):
-            print(abspath)
+            # print(abspath)
             raise Pebkac(404)
 
         if not os.path.isdir(fsenc(abspath)):

copyparty/httpsrv.py

@@ -48,7 +48,7 @@ class HttpSrv(object):
             return len(self.clients)
 
     def shutdown(self):
-        print("ok bye")
+        self.log("ok bye")
 
     def thr_client(self, sck, addr):
         """thread managing one tcp client"""
@@ -69,13 +69,20 @@ class HttpSrv(object):
 
         finally:
             self.log(str(addr), "-" * 7 + "C-done")
-            sck.shutdown(socket.SHUT_RDWR)
+            try:
-            sck.close()
+                sck.shutdown(socket.SHUT_RDWR)
-            with self.mutex:
+                sck.close()
-                del self.clients[cli]
+            except (OSError, socket.error) as ex:
+                if ex.errno not in [107, 9]:
+                    # 107 Transport endpoint not connected
+                    #   9 Bad file descriptor
+                    raise
+            finally:
+                with self.mutex:
+                    del self.clients[cli]
 
-            if self.disconnect_func:
+                if self.disconnect_func:
-                self.disconnect_func(addr)  # pylint: disable=not-callable
+                    self.disconnect_func(addr)  # pylint: disable=not-callable
 
     def thr_workload(self):
         """indicates the python interpreter workload caused by this HttpSrv"""

copyparty/svchub.py

@@ -52,28 +52,31 @@ class SvcHub(object):
         try:
             while True:
                 time.sleep(9001)
+
         except KeyboardInterrupt:
-            print("OPYTHAT")
+            with self.log_mutex:
+                print("OPYTHAT")
+
             self.tcpsrv.shutdown()
             self.broker.shutdown()
             print("nailed it")
 
     def log(self, src, msg):
         """handles logging from all components"""
-        now = time.time()
-        if now >= self.next_day:
-            dt = datetime.utcfromtimestamp(now)
-            print("\033[36m{}\033[0m".format(dt.strftime("%Y-%m-%d")))
-
-            # unix timestamp of next 00:00:00 (leap-seconds safe)
-            day_now = dt.day
-            while dt.day == day_now:
-                dt += timedelta(hours=12)
-
-            dt = dt.replace(hour=0, minute=0, second=0)
-            self.next_day = calendar.timegm(dt.utctimetuple())
-
         with self.log_mutex:
+            now = time.time()
+            if now >= self.next_day:
+                dt = datetime.utcfromtimestamp(now)
+                print("\033[36m{}\033[0m".format(dt.strftime("%Y-%m-%d")))
+
+                # unix timestamp of next 00:00:00 (leap-seconds safe)
+                day_now = dt.day
+                while dt.day == day_now:
+                    dt += timedelta(hours=12)
+
+                dt = dt.replace(hour=0, minute=0, second=0)
+                self.next_day = calendar.timegm(dt.utctimetuple())
+
             ts = datetime.utcfromtimestamp(now).strftime("%H:%M:%S")
             print("\033[36m{} \033[33m{:21} \033[0m{}".format(ts, src, msg))