diff --git a/src/vtestream-file.h b/src/vtestream-file.h
index bcd68df..bb42413 100644
--- a/src/vtestream-file.h
+++ b/src/vtestream-file.h
@@ -243,10 +243,21 @@ static void
 _file_write (int fd, const char *data, gsize len, gsize offset)
 {
 	gsize ret;
+static guint64 total = 0;
+static int totalfd = -1;
+char buf[100];
 
         if (G_UNLIKELY (fd == -1))
                 return;
 
+if (G_UNLIKELY (totalfd == -1)) {
+sprintf(buf, "/tmp/gnome-terminal-vte-stream-written-%d", getpid());
+totalfd = open(buf, O_WRONLY | O_CREAT | O_TRUNC, 0600);
+}
+total += len;
+sprintf(buf, "%lu\n", total);
+pwrite(totalfd, buf, strlen(buf), 0);
+
 	while (len) {
                 ret = pwrite (fd, data, len, offset);
 		if (G_UNLIKELY (ret == (gsize) -1)) {