#!/bin/sh E3=/usr/bin/e3 whichE3=${E3}pi if [ -f ${E3} ]; then if [ -f ${whichE3} ]; then if [ $# -eq 0 ]; then ${whichE3} else for i in $@ do ${whichE3} $i done fi else echo ${whichE3}: file does not exist fi else echo "${E3}: file does not exist" fi