tools/regression/bin/sh/execution/set-x1.0

   1 # $FreeBSD: src/tools/regression/bin/sh/execution/set-x1.0,v 1.1 2011/06/08 21:58:19 jilles Exp $
   2
   3 key='must_contain_this'
   4 { r=`set -x; { : "$key"; } 2>&1 >/dev/null`; } 2>/dev/null
   5 case $r in
   6 *"$key"*) true ;;
   7 *) false ;;
   8 esac