From c70b5020064d7a13885439796ad66eaa28e94145 Mon Sep 17 00:00:00 2001
From: Kyle Isom <kyle@imap.cc>
Date: Wed, 26 Nov 2025 16:14:38 -0800
Subject: [PATCH] display message if KIONREAD ioctl fails.

---
 main.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/main.c b/main.c
index d7e3d1f..3e6d27b 100644
--- a/main.c
+++ b/main.c
@@ -2918,6 +2918,15 @@ kbhit(void)
 {
 	int	 bytes_waiting;
 	ioctl(STDIN_FILENO, FIONREAD, &bytes_waiting);
+
+	if (bytes_waiting < 0) {
+		editor_set_status("kbhit: FIONREAD failed: %s", strerror(errno));
+
+		/* if FIONREAD fails, we need to assume we should read. this
+		 * will default to a much slower input sequence, but it'll work.
+		 */
+		return 1;
+	}
 	return bytes_waiting > 0;
 }