1#!/bin/sh 2 3candidate="$1" 4 5xzcat=`which $candidate 2>/dev/null` 6if [ ! -x "$xzcat" ]; then 7 xzcat=`which xzcat 2>/dev/null` 8 if [ ! -x "$xzcat" ]; then 9 # echo nothing: no suitable xzcat found 10 exit 1 11 fi 12fi 13 14echo $xzcat 15