Copy head to stable/9 as part of 9.0-RELEASE release cycle.

[FreeBSD/stable/9.git] / tools / regression / bin / sh / execution / set-x3.0

# $FreeBSD$

key='must contain this'
PS4='$key+ '
{ r=`set -x; { :; } 2>&1 >/dev/null`; } 2>/dev/null
case $r in
*"$key"*) true ;;
*) false ;;
esac