From 954385ce0d8f7176e78607aa32cb254a01ff4b9f Mon Sep 17 00:00:00 2001
From: James Turner <zakalawe@mac.com>
Date: Wed, 29 Apr 2020 11:43:47 +0100
Subject: [PATCH] Improve log message when fgfs_lock.pid exists

Part of addressing:
https://sourceforge.net/p/flightgear/codetickets/2133/

Still need to decide about a better GUI dialog for this.
---
 src/Main/fg_init.cxx | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Main/fg_init.cxx b/src/Main/fg_init.cxx
index 518579f88..06a87ae48 100644
--- a/src/Main/fg_init.cxx
+++ b/src/Main/fg_init.cxx
@@ -514,7 +514,9 @@ bool fgInitHome()
         int err = ::flock(fd, LOCK_EX | LOCK_NB);
         if (err < 0) {
             if ( errno ==  EWOULDBLOCK) {
-                SG_LOG(SG_GENERAL, SG_ALERT, "flightgear instance already running, switching to FG_HOME read-only.");
+                SG_LOG(SG_GENERAL, SG_ALERT, "flightgear instance already running, switching to FG_HOME read-only. ");
+                SG_LOG(SG_GENERAL, SG_ALERT, "Couldn't flock() file at:" << pidPath);
+
                 // set a marker property so terrasync/navcache don't try to write
                 // from secondary instances
                 fgSetBool("/sim/fghome-readonly", true);