#!/usr/bin/env sh
abs() {
local rel
local p
if [ $# -ne 1 ]
then
rel=.
else
rel=$1
fi
if [ -d $rel ]
pushd $rel > /dev/null
p=`pwd`
popd > /dev/null
pushd `dirname $rel` > /dev/null
p=`pwd`/`basename $rel`
echo $p
}