flightgear/Simulator/runfg

#!/usr/bin/perl

#---------------------------------------------------------------------------
# runfg -- front end for setting up the FG_ROOT env variable and launching 
#          the fg executable.
#
# Written by Curtis Olson, started September 1997.
#
# Copyright (C) 1997  Curtis L. Olson  - curt@infoplane.com
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
# $Id$
# (Log is kept at end of this file)
#---------------------------------------------------------------------------


# Flight Gear Version
$version_major = "0";

$path = "";

# name of Flight Gear executable
@programs = ( "fg" . $version_major, "fg" . $version_major . ".exe" );

# see if we can find the executable
while ( $path eq "" && ($program = shift(@programs)) ) {
    print "$program\n";

    if ( -x "./Main/$program" ) {
	$path = "./Main/$program";
    } elsif ( -x "./$program" ) {
	$path = "./$program";
    }
}

die "Cannot locate program.\n" if ( $path eq "" );


# set the FG_ROOT environment variable if it hasn't already been set.
if ( $ENV{FG_ROOT} eq "" ) {
    # look for a file called fgtop as a place marker
    if ( -e "fgtop" ) {
        $ENV{FG_ROOT} = ".";
    } elsif ( -e "../fgtop" ) {
        $ENV{FG_ROOT} = "..";
    }
}

# run Flight Gear
print "Running $path @ARGV\n";
exec("$path @ARGV");


#---------------------------------------------------------------------------
# $Log$
# Revision 1.4  1998/03/09 22:52:38  curt
# Mod's to better support win32 if perl exists.
#
# Revision 1.3  1998/02/16 16:17:34  curt
# Minor tweaks.
#
# Revision 1.2  1998/01/27 00:47:43  curt
# Incorporated Paul Bleisch's <bleisch@chromatic.com> new debug message
# system and commandline/config file processing code.
#
# Revision 1.1  1997/10/28 18:47:27  curt
# Initial revision.
#