1*3e3895bfSKrzysztof Piecuch# $FreeBSD: head/bin/sh/tests/execution/set-x3.0 222907 2011-06-09 23:12:23Z jilles $ 297fe2313SPeter Avalos 397fe2313SPeter Avaloskey='must contain this' 497fe2313SPeter AvalosPS4='$key+ ' 597fe2313SPeter Avalos{ r=`set -x; { :; } 2>&1 >/dev/null`; } 2>/dev/null 697fe2313SPeter Avaloscase $r in 797fe2313SPeter Avalos*"$key"*) true ;; 897fe2313SPeter Avalos*) false ;; 997fe2313SPeter Avalosesac 10