skip call to read where there is no data present

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@14813 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/switch_console.c

@@ -878,6 +878,14 @@ SWITCH_DECLARE(void) switch_console_loop(void)
 			break;
 		}
 
+		if (FD_ISSET(fileno(stdin), &efds)) {
+			continue;
+		}
+		
+		if (!FD_ISSET(fileno(stdin), &rfds)) {
+			activity = 0;
+		}
+
 		if (activity == 0) {
 			fflush(stdout);
 			continue;