From cf3f16078363b48836b482d883625ea6f3d232b8 Mon Sep 17 00:00:00 2001
From: Isaac Connor <iconnor@pseudo.connortechnology.com>
Date: Wed, 15 Jul 2015 16:02:02 -0400
Subject: [PATCH] add error handling on failure to open serial port

---
 scripts/ZoneMinder/lib/ZoneMinder/Trigger/Channel/Serial.pm | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/scripts/ZoneMinder/lib/ZoneMinder/Trigger/Channel/Serial.pm b/scripts/ZoneMinder/lib/ZoneMinder/Trigger/Channel/Serial.pm
index a3709b5bb..ddfc53436 100644
--- a/scripts/ZoneMinder/lib/ZoneMinder/Trigger/Channel/Serial.pm
+++ b/scripts/ZoneMinder/lib/ZoneMinder/Trigger/Channel/Serial.pm
@@ -58,6 +58,12 @@ sub open
 {
     my $self = shift;
     my $device = new Device::SerialPort( $self->{path} );
+    if ( ! $device )
+    {
+        Error( "Unable to open $$self{path}: $!" );
+        $self->{state} = 'closed';
+        return;
+    }
     $device->baudrate(9600);
     $device->databits(8);
     $device->parity('none');