#!/bin/sh

# Copyright (C) 2000-2021 Free Software Foundation, Inc.
# This file is part of GNU Modula-2.
#
# GNU Modula-2 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 3, or (at your option)
# any later version.
#
# GNU Modula-2 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 GNU Modula-2; see the file COPYING.  If not, write to the
# Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.
#

#
# incfile - increments a number within a file
#

if [ -f $1 ] ; then
   number=`cat $1`
else
   number="0"
fi

number=`expr $number + 1`
rm -f $1
echo "$number" > $1
