From 9c48ec785c69442892a8acb3257c308fb9611310 Mon Sep 17 00:00:00 2001
From: Mike Black W9MDB <mdblack98@yahoo.com>
Date: Thu, 12 Jan 2023 11:23:11 -0600
Subject: [PATCH] Improve serial port timeout when permission proble or does
 not exist https://github.com/Hamlib/Hamlib/issues/1216

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

diff --git a/src/serial.c b/src/serial.c
index e22df68bd..05d72c22b 100644
--- a/src/serial.c
+++ b/src/serial.c
@@ -231,7 +231,7 @@ int HAMLIB_API serial_open(hamlib_port_t *rp)
             fd = OPEN(rp->pathname, O_RDWR | O_NOCTTY | O_NDELAY);
         }
     }
-    while (++i <= 4 && fd == -1);
+    while (++i <= 4 && fd == -1 && errno != ENOENT && errno != EPERM);
 
     if (fd == -1)
     {