fixing connection handling when client closed connection

server.c

@@ -54,8 +54,9 @@ int server_start(conn_handler handler, int16_t port) {
             for(ret = 0; 0 == ret;) {
                 bzero(buffer, MAX_BUFSIZE);
                 len = 0;
-                while(buffer[len-1] != '\n') {
+                for(int i = 0; 0 < i && buffer[len-1] != '\n';) {
-                    len += read(clientfd, &buffer[len], sizeof(buffer)-len);
+                    i = read(clientfd, &buffer[len], sizeof(buffer)-len);
+		    len += i;
                 }
                 if (0 > len) {
                     printf("server_start: cannot read from socket\n");