#!/bin/ksh
################################################################################
#    iGMT: Interactive Mapping of Geoscientific Datasets.                      #
#               Easy access to GMT via a Tcl/Tk GUI                            #
#                                                                              #
#    Copyright (C) 1998  Thorsten W. Becker, Alexander Braun                   #
#                                                                              #
#    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; see the file COPYING.  If not, write to          #
#    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,          #
#    Boston, MA 02111-1307, USA.                                               #
#                                                                              #
################################################################################

    
if [ $# -ne 2 ] 
then
    exit
fi
case $2 in
    CHECK_ONLY_IF_THERE) # this option only checks if the file in 
			 # argument one is there
	if [ -s $1 ]
	then
	    echo 1
	    exit 0
        else 
	    echo 0
	    exit -1
	fi
	exit;;
    *)                   # is file1 is not there, replace it with
			 # file2
    if [ ! -s $1 ]
    then 
	if [ -s $2 ]
	then
	    echo 1
	    cp $2 $1
	else
	    echo 0
	fi
    fi;;
esac

