read(STDIN_FILENO, buf, sizeof(buf));

read(STDIN_FILENO, buf, sizeof(buf))是一个系统调用函数，用于从标准输入读取数据并存储到buf数组中。其中，STDIN_FILENO是标准输入文件描述符，buf是存储读取数据的缓冲区，sizeof(buf)表示buf数组的大小，即最大可以读取的数据量。该函数返回读取到的数据的字节数。\[1\]
#### 引用[.reference_title]
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