xref: /freebsd/bin/sh/tests/execution/set-x3.0 (revision f4b37ed0f8b307b1f3f0f630ca725d68f1dff30d)
1# $FreeBSD$
2
3key='must contain this'
4PS4='$key+ '
5{ r=`set -x; { :; } 2>&1 >/dev/null`; } 2>/dev/null
6case $r in
7*"$key"*) true ;;
8*) false ;;
9esac
10