buf = para_malloc(STDIN_INPUT_BUFFER_SIZE);
ret = read(STDIN_FILENO, buf, STDIN_INPUT_BUFFER_SIZE);
//PARA_CRIT_LOG("read ret: %d\n", ret);
buf = para_malloc(STDIN_INPUT_BUFFER_SIZE);
ret = read(STDIN_FILENO, buf, STDIN_INPUT_BUFFER_SIZE);
//PARA_CRIT_LOG("read ret: %d\n", ret);