1 2f() { 3 local PATH IFS elem 4 IFS=: 5 for elem in ''$PATH''; do 6 PATH=/var/empty/$elem:$PATH 7 done 8 ls -d / >/dev/null 9} 10 11p1=$(command -v ls) 12f 13p2=$(command -v ls) 14[ "$p1" = "$p2" ] 15