1# $FreeBSD: stable/10/bin/sh/tests/expansion/cmdsubst20.0 315179 2017-03-12 19:49:08Z jilles $ 2 3set -T 4trapped='' 5trap "trapped=x$trapped" USR1 6[ "x$(kill -USR1 $$)y" = xy ] && [ "$trapped" = x ] 7