1# $FreeBSD$ 2 3v=$( 4 ${SH} -c 'trap "echo ok; exit" USR1; kill -USR1 $$' & 5 # Suppress possible message about exit on signal 6 wait $! >/dev/null 2>&1 7) 8r=$(kill -l $?) 9[ "$v" = "ok" ] && { [ "$r" = "USR1" ] || [ "$r" = "usr1" ]; } 10