From 452dc8b8864a8a60e60120f89430cb08ac0617e2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?St=C3=A9phane=20Raimbault?= <stephane.raimbault@gmail.com>
Date: Tue, 22 Oct 2024 14:42:19 +0200
Subject: [PATCH] Use O_NONBLOCK instead of deprecated O_NDELAY (closes #710)

Usually exact same value because
`#define O_NDELAY O_NONBLOCK`
---
 src/modbus-rtu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/modbus-rtu.c b/src/modbus-rtu.c
index 9a0609d5..fc8a8009 100644
--- a/src/modbus-rtu.c
+++ b/src/modbus-rtu.c
@@ -639,7 +639,7 @@ static int _modbus_rtu_connect(modbus_t *ctx)
 
        Timeouts are ignored in canonical input mode or when the
        NDELAY option is set on the file via open or fcntl */
-    flags = O_RDWR | O_NOCTTY | O_NDELAY | O_EXCL;
+    flags = O_RDWR | O_NOCTTY | O_NONBLOCK | O_EXCL;
 #ifdef O_CLOEXEC
     flags |= O_CLOEXEC;
 #endif