diff --git a/common.cpp b/common.cpp
index 9bc8522..2cb0953 100644
--- a/common.cpp
+++ b/common.cpp
@@ -481,12 +481,12 @@ int set_buf_size(int fd,int socket_buf_size,int force_socket_buf)
 	{
 		if(setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &socket_buf_size, sizeof(socket_buf_size))<0)
 		{
-			mylog(log_fatal,"SO_SNDBUF fail  socket_buf_size=%d  errno=%s\n",socket_buf_size,strerror(errno));
+			mylog(log_fatal,"SO_SNDBUF fail  socket_buf_size=%d  errno=%s\n",socket_buf_size,get_sock_error());
 			myexit(1);
 		}
 		if(setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &socket_buf_size, sizeof(socket_buf_size))<0)
 		{
-			mylog(log_fatal,"SO_RCVBUF fail  socket_buf_size=%d  errno=%s\n",socket_buf_size,strerror(errno));
+			mylog(log_fatal,"SO_RCVBUF fail  socket_buf_size=%d  errno=%s\n",socket_buf_size,get_sock_error());
 			myexit(1);
 		}
 	}
@@ -772,7 +772,7 @@ int new_connected_socket(int &fd,u32_t ip,int port)
 	int ret = connect(fd, (struct sockaddr *) &remote_addr_in, slen);
 	if (ret != 0) {
 		mylog(log_warn, "[%s]fd connect fail\n",ip_port);
-		close(fd);
+		sock_close(fd);
 		return -1;
 	}
 	return 0;
diff --git a/fd_manager.cpp b/fd_manager.cpp
index d07d2d7..da249bd 100644
--- a/fd_manager.cpp
+++ b/fd_manager.cpp
@@ -30,7 +30,7 @@ void fd_manager_t::fd64_close(fd64_t fd64)
 	{
 		fd_info_mp.erase(fd64);
 	}
-	close(fd);
+	sock_close(fd);
 }
 void fd_manager_t::reserve(int n)
 {
diff --git a/main.cpp b/main.cpp
index f59975a..9e483ae 100644
--- a/main.cpp
+++ b/main.cpp
@@ -103,6 +103,8 @@ int main(int argc, char *argv[])
     ev_signal signal_watcher_sigpipe;
     ev_signal_init(&signal_watcher_sigpipe, sigpipe_cb, SIGPIPE);
     ev_signal_start(loop, &signal_watcher_sigpipe);
+#else
+    enable_log_color=0;
 #endif
 
     ev_signal signal_watcher_sigterm;
diff --git a/misc.cpp b/misc.cpp
index 4b91cf2..9ac919d 100644
--- a/misc.cpp
+++ b/misc.cpp
@@ -601,6 +601,7 @@ void process_arg(int argc, char *argv[])
 		{"log-level", required_argument,    0, 1},
 		{"log-position", no_argument,    0, 1},
 		{"disable-color", no_argument,    0, 1},
+		{"enable-color", no_argument,    0, 1},
 		{"disable-filter", no_argument,    0, 1},
 		{"disable-fec", no_argument,    0, 1},
 		{"disable-obscure", no_argument,    0, 1},
@@ -654,6 +655,10 @@ void process_arg(int argc, char *argv[])
 				}
 			}
 		}
+		if(strcmp(argv[i],"--enable-color")==0)
+		{
+			enable_log_color=1;
+		}
 		if(strcmp(argv[i],"--disable-color")==0)
 		{
 			enable_log_color=0;
@@ -812,6 +817,10 @@ void process_arg(int argc, char *argv[])
 			{
 				//enable_log_color=0;
 			}
+			else if(strcmp(long_options[option_index].name,"enable-color")==0)
+			{
+				//enable_log_color=0;
+			}
 			else if(strcmp(long_options[option_index].name,"disable-fec")==0)
 			{
 				disable_fec=1;
diff --git a/tunnel_client.cpp b/tunnel_client.cpp
index 5dfbf39..184b6fe 100644
--- a/tunnel_client.cpp
+++ b/tunnel_client.cpp
@@ -46,7 +46,7 @@ void data_from_local_or_fec_timeout(conn_info_t & conn_info,int is_time_out)
 		socklen_t udp_new_addr_len = sizeof(sockaddr_in);
 		if ((data_len = recvfrom(local_listen_fd, data, max_data_len, 0,
 				(struct sockaddr *) &udp_new_addr_in, &udp_new_addr_len)) == -1) {
-			mylog(log_error,"recv_from error,this shouldnt happen,err=%s,but we can try to continue\n",strerror(errno));
+			mylog(log_error,"recv_from error,this shouldnt happen,err=%s,but we can try to continue\n",get_sock_error());
 			return;
 		};
 
@@ -126,12 +126,12 @@ static void remote_cb(struct ev_loop *loop, struct ev_io *watcher, int revents)
 	mylog(log_trace, "received data from udp fd %d, len=%d\n", remote_fd,data_len);
 	if(data_len<0)
 	{
-		if(errno==ECONNREFUSED)
+		if(get_sock_errno()==ECONNREFUSED)
 		{
-			mylog(log_debug, "recv failed %d ,udp_fd%d,errno:%s\n", data_len,remote_fd,strerror(errno));
+			mylog(log_debug, "recv failed %d ,udp_fd%d,errno:%s\n", data_len,remote_fd,get_sock_error());
 		}
 
-		mylog(log_warn, "recv failed %d ,udp_fd%d,errno:%s\n", data_len,remote_fd,strerror(errno));
+		mylog(log_warn, "recv failed %d ,udp_fd%d,errno:%s\n", data_len,remote_fd,get_sock_error());
 		return;
 	}
 	if(!disable_mtu_warn&&data_len>mtu_warn)
@@ -187,7 +187,7 @@ static void fifo_cb(struct ev_loop *loop, struct ev_io *watcher, int revents)
 	int len=read (fifo_fd, buf, sizeof (buf));
 	if(len<0)
 	{
-		mylog(log_warn,"fifo read failed len=%d,errno=%s\n",len,strerror(errno));
+		mylog(log_warn,"fifo read failed len=%d,errno=%s\n",len,get_sock_error());
 		return;
 	}
 	buf[len]=0;
diff --git a/tunnel_server.cpp b/tunnel_server.cpp
index 69743d5..0ca443c 100644
--- a/tunnel_server.cpp
+++ b/tunnel_server.cpp
@@ -95,7 +95,7 @@ void data_from_remote_or_fec_timeout_or_conn_timer(conn_info_t & conn_info,fd64_
 
 		if(data_len<0)
 		{
-			mylog(log_debug,"udp fd,recv_len<0 continue,%s\n",strerror(errno));
+			mylog(log_debug,"udp fd,recv_len<0 continue,%s\n",get_sock_error());
 
 			return;
 		}
@@ -137,7 +137,7 @@ static void local_listen_cb(struct ev_loop *loop, struct ev_io *watcher, int rev
 	socklen_t udp_new_addr_len = sizeof(sockaddr_in);
 	if ((data_len = recvfrom(local_listen_fd, data, max_data_len, 0,
 			(struct sockaddr *) &udp_new_addr_in, &udp_new_addr_len)) == -1) {
-		mylog(log_error,"recv_from error,this shouldnt happen,err=%s,but we can try to continue\n",strerror(errno));
+		mylog(log_error,"recv_from error,this shouldnt happen,err=%s,but we can try to continue\n",get_sock_error());
 		return;
 	};
 	mylog(log_trace,"Received packet from %s:%d,len: %d\n", inet_ntoa(udp_new_addr_in.sin_addr),
@@ -287,7 +287,7 @@ static void fifo_cb(struct ev_loop *loop, struct ev_io *watcher, int revents)
 	int len=read (fifo_fd, buf, sizeof (buf));
 	if(len<0)
 	{
-		mylog(log_warn,"fifo read failed len=%d,errno=%s\n",len,strerror(errno));
+		mylog(log_warn,"fifo read failed len=%d,errno=%s\n",len,get_sock_error());
 		return;
 	}
 	buf[len]=0;