From f0ad01ff4526cb43bf701cb1cbe3bdc5291b23a3 Mon Sep 17 00:00:00 2001
From: "John Ankarstr\\xf6m" <john@ankarstrom.se>
Date: Mon, 31 May 2021 19:30:21 +0200
Subject: Now it works

---
 termsettitle.c | 31 ++++++++++++++++++++++++-------
 1 file changed, 24 insertions(+), 7 deletions(-)

diff --git a/termsettitle.c b/termsettitle.c
index 8ed1b9f..2ff9883 100644
--- a/termsettitle.c
+++ b/termsettitle.c
@@ -17,6 +17,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/select.h>
 #include <termios.h>
 #include <unistd.h>
 
@@ -27,22 +28,38 @@ int
 da(int fd, char *buf, int real)
 {
 	char c;
-	int i, r;
+	fd_set fds;
+	int i, r, responses;
+	struct timeval timeout;
+
+	FD_ZERO(&fds);
+	FD_SET(fd, &fds);
+	timeout.tv_sec = 0;
+	timeout.tv_usec = 0;
+	responses = 0;
+
 	i = 0;
 	if(real) write(fd, "\033P\033[>c\033\\", 8);
 	else write(fd, "\033[>c", 4);
+
+read:
 	while(r = read(fd, &c, 1)){
 		if(!r){
 			fprintf(stderr, "bad terminal\n");
 			return -1;
 		}
-		buf[i] = c;
-		if(c==99){
-			buf[++i] = '\0';
-			return i;
-		}
-		i++;
+		buf[i++] = c;
+		if(c==99) break;
 	}
+	buf[i] = '\0';
+	responses++;
+
+	/* ensure there is only one real terminal */
+	if(real && select(fd+1, &fds, NULL, NULL, &timeout)>0)
+		goto read;
+	if(responses>1)
+		buf[0] = '\0';
+
 	return i;
 }
 
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