Sync sh(1) in stable/10 to head.

[FreeBSD/stable/10.git] / bin / sh / tests / execution / set-x2.0

# $FreeBSD$

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