1*13de33a5SJulio Merino 2*13de33a5SJulio Merinov=$( 3*13de33a5SJulio Merino ${SH} -c 'trap "echo ok; exit" USR1; kill -USR1 $$' & 4*13de33a5SJulio Merino # Suppress possible message about exit on signal 5*13de33a5SJulio Merino wait $! >/dev/null 2>&1 6*13de33a5SJulio Merino) 7*13de33a5SJulio Merinor=$(kill -l $?) 8*13de33a5SJulio Merino[ "$v" = "ok" ] && { [ "$r" = "USR1" ] || [ "$r" = "usr1" ]; } 9