r = wait_for_terminate(child, &si);
if (r < 0 || si.si_code != CLD_EXITED || si.si_status != EXIT_SUCCESS)
return r < 0 ? r : -EIO;
r = wait_for_terminate(child, &si);
if (r < 0 || si.si_code != CLD_EXITED || si.si_status != EXIT_SUCCESS)
return r < 0 ? r : -EIO;