--- a/sw/mcsi-rxtx/mainloop.c	Mon Oct 28 01:45:32 2024 +0000
+++ b/sw/mcsi-rxtx/mainloop.c	Mon Oct 28 06:02:04 2024 +0000
@@ -12,13 +12,15 @@
 
 extern int target_fd;
 
+int is_active;
+
 main_loop()
 {
 	fd_set fds;
 	struct timeval tv;
 	u_char buf[320];
 	unsigned off;
-	int cc, is_active;
+	int cc;
 
 	is_active = 0;
 	off = 0;
@@ -35,12 +37,15 @@
 		if (cc < 0) {
 			if (errno == EINTR)
 				continue;
+			tty_cleanup();
 			perror("select");
 			exit(1);
 		}
 		if (cc == 0) {
 			is_active = 0;
-			printf("Rx stream stopped, buffer dribble = %u\n", off);
+			sprintf(buf, "Rx stream stopped, buffer dribble = %u",
+				off);
+			async_msg_output(buf);
 			off = 0;
 			continue;
 		}
@@ -49,15 +54,17 @@
 		if (FD_ISSET(target_fd, &fds)) {
 			cc = read(target_fd, buf + off, sizeof(buf) - off);
 			if (cc < 0) {
+				tty_cleanup();
 				perror("serial port read");
 				exit(1);
 			}
 			if (cc == 0) {
+				tty_cleanup();
 				fprintf(stderr, "read EOF from serial port\n");
 				exit(1);
 			}
 			if (!is_active) {
-				printf("Rx stream started\n");
+				async_msg_output("Rx stream started");
 				is_active = 1;
 			}
 			off += cc;
@@ -66,5 +73,6 @@
 				off = 0;
 			}
 		}
+		fflush(stdout);
 	}
 }