From 482952ef03359a468bbc35b26738aaf47610e410 Mon Sep 17 00:00:00 2001
From: "Richard M. Stallman" <rms@gnu.org>
Date: Sat, 13 Nov 1993 07:50:17 +0000
Subject: [PATCH] (read_avail_input) [no FIONREAD]: On DGUX, as on USG, read
 input with O_NDELAY.

---
 src/keyboard.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/keyboard.c b/src/keyboard.c
index 0f12c5b03ac..249c594d2a8 100644
--- a/src/keyboard.c
+++ b/src/keyboard.c
@@ -3044,7 +3044,7 @@ read_avail_input (expected)
       if (nread > sizeof cbuf)
 	nread = sizeof cbuf;
 #else /* no FIONREAD */
-#ifdef USG
+#if defined(USG) || defined(DGUX)
       /* Read some input if available, but don't wait.  */
       nread = sizeof cbuf;
       fcntl (fileno (stdin), F_SETFL, O_NDELAY);
-- 
2.39.5