env1.0   [plain text]

# $FreeBSD: head/bin/sh/tests/parameters/env1.0 222957 2011-06-10 22:42:00Z jilles $

export key='must contain this'
unset x
r=$(ENV="\${x?\$key}" ${SH} -i +m 2>&1 >/dev/null <<\EOF
exit 0
EOF
) && case $r in
*"$key"*) true ;;
*) false ;;
esac