From 9c743fc4c99969e8d79320afeaa03501cd4ec78a Mon Sep 17 00:00:00 2001
From: ehofman <ehofman>
Date: Sat, 29 Jan 2005 10:22:44 +0000
Subject: [PATCH] Geoff Air:

RE: --aircraft=ufo in system.fgfsrc is ignored

To change a 'feature', one that has been mentioned here many
times, and again recently, place the following code block
into fgInitFGAircraft.

In its favour, I would argue this means FG can be run without
a command line, provided FG_ROOT has been set in the
environment, and that seems to me, as it should be ... ;=))

Perhaps the only counter, is that system.fgfsrc is read twice,
but so are others, like .fgfsrc, for other (local) options ...
or system.fgfsrc should .nt. be used for 'aircraft' ?
---
 src/Main/fg_init.cxx | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/Main/fg_init.cxx b/src/Main/fg_init.cxx
index 8dcefe3d1..66d0a4809 100644
--- a/src/Main/fg_init.cxx
+++ b/src/Main/fg_init.cxx
@@ -343,6 +343,12 @@ bool fgInitFGAircraft ( int argc, char **argv ) {
     // if an aircraft was specified, set the property name
     if ( !aircraft.empty() ) {
         SG_LOG(SG_INPUT, SG_INFO, "aircraft = " << aircraft );
+        if ( aircraft.empty() ) {
+            // Check for $fg_root/system.fgfsrc
+            SGPath sysconf( globals->get_fg_root() );
+            sysconf.append( "system.fgfsrc" );
+            aircraft = fgScanForOption( "--aircraft=", sysconf.str() );
+        } 
         fgSetString("/sim/aircraft", aircraft.c_str() );
     } else {
         SG_LOG(SG_INPUT, SG_INFO, "No user specified aircraft, using default" );