Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

[FreeBSD/stable/10.git] / tools / regression / bin / sh / 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