From c4c29f33d47981d2379b4f81f815adcf506d7ad9 Mon Sep 17 00:00:00 2001
From: Julian Smith <jules@op59.net>
Date: Sun, 21 Feb 2021 17:09:41 +0000
Subject: [PATCH] src/Input/FGLinuxEventInput.cxx: don't throw if we cannot
 open device.

Throwing halts execution; we now output a diagnostic and return false, and
flightgear appears ok to continue.
---
 src/Input/FGLinuxEventInput.cxx | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/Input/FGLinuxEventInput.cxx b/src/Input/FGLinuxEventInput.cxx
index dcdae8d6e..20c3437b2 100644
--- a/src/Input/FGLinuxEventInput.cxx
+++ b/src/Input/FGLinuxEventInput.cxx
@@ -290,8 +290,13 @@ static inline bool bitSet( unsigned char * buf, unsigned bit )
 bool FGLinuxInputDevice::Open()
 {
   if( fd != -1 ) return true;
-  if( (fd = ::open( devname.c_str(), O_RDWR )) == -1 ) { 
-    throw std::exception();
+  if( (fd = ::open( devname.c_str(), O_RDWR )) == -1 ) {
+    SG_LOG( SG_INPUT, SG_ALERT, "Cannot open devname='" << devname
+            << "'. errno=" << errno
+            << ": " << strerror(errno)
+            );
+    //throw std::exception();
+    return false;
   }
 
   if( GetGrab() && ioctl( fd, EVIOCGRAB, 2 ) == -1 ) {