#!/bin/sh
#
# $Id: ren 356 2011-09-24 23:25:47Z svnuser $
#
# $Log: ren,v $
# Revision 1.1  1998/05/24 05:23:41  merlin
# First version checked in CVS
#
#

IFS=" 	
"; export IFS

USAGE="$0 [directory] .old_ext .new_ext"

if [ $# -gt 1 ]; then
	if [ $# = 2 ]; then
		OLD_EXT=$1
		NEW_EXT=$2
	else
		if [ $# = 3 -a -d $1 ]; then
			cd $1
			OLD_EXT=$2
			NEW_EXT=$3
		else
			echo $USAGE
			exit 1
		fi
	fi
else
	echo $USAGE
	exit 1
fi

if [ $OLD_EXT = . ]; then
	OLD_EXT=""
fi

if [ $NEW_EXT = . ]; then
	NEW_EXT=""
fi

for i in *$OLD_EXT
do
	mv $i `basename $i $OLD_EXT`$NEW_EXT
done