wait_and_timeout
if (wait_and_timeout(reader_pid, 1, &status,
if (wait_and_timeout(writer_pid, 1, &status,
if (wait_and_timeout(writer_pid, 1, &status,
if (wait_and_timeout(reader_pid, 1, &status,
if (wait_and_timeout(pid, 5, &status,
if (wait_and_timeout(pid, 5, &status,