From 170430d505c6436be9747cbee04e734eb7eff831 Mon Sep 17 00:00:00 2001
From: Edward Tomasz Napierala <trasz@FreeBSD.org>
Date: Sun, 25 Feb 2018 20:15:06 +0000
Subject: [PATCH] Prevent getty(8) from looping indefinitely if the device node
 doesn't exist. This behaviour makes no sense for eg USB serial adapters, or
 USB device-side serial templates.

This mostly reverts to pre-r135941 behaviour.

Reviewed by:	imp@
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D14198
---
 libexec/getty/main.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/libexec/getty/main.c b/libexec/getty/main.c
index c4f396d7f8a..78b352d1188 100644
--- a/libexec/getty/main.c
+++ b/libexec/getty/main.c
@@ -427,15 +427,17 @@ main(int argc, char *argv[])
 static int
 opentty(const char *tty, int flags)
 {
-	int i;
-	int failopenlogged = 0;
+	int failopenlogged = 0, i, saved_errno;
 
 	while ((i = open(tty, flags)) == -1)
 	{
+		saved_errno = errno;
 		if (!failopenlogged) {
 			syslog(LOG_ERR, "open %s: %m", tty);
 			failopenlogged = 1;
 		}
+		if (saved_errno == ENOENT)
+			return 0;
 		sleep(60);
 	}
 	if (login_tty(i) < 0) {