1#!/bin/sh 2# Like mv $1 $2, but if the files are the same, just delete $1. 3# Status is zero if successful, nonzero otherwise. 4 5usage="$0: usage: $0 SOURCE DEST" 6 7case $# in 82) ;; 9*) echo "$usage" >&2; exit 1;; 10esac 11 12for arg in "$1" "$2"; do 13 case $arg in 14 -*) echo "$usage" >&2; exit 1;; 15 esac 16done 17 18if test -r "$2" && cmp -s "$1" "$2"; then 19 rm -f "$1" 20else 21 mv -f "$1" "$2" 22fi 23