文件描述符

¥File descriptors

1. 任何指定的文件描述符都必须支持读取。

   ¥Any specified file descriptor has to support reading.

2. 如果将文件描述符指定为 path，则它将不会自动关闭。

   ¥If a file descriptor is specified as the path, it will not be closed automatically.

3. 读数将从当前位置开始。例如，如果文件已经具有 'Hello World' 并且使用文件描述符读取了六个字节，则使用相同文件描述符对 fs.readFile() 的调用将得到 'World'，而不是 'Hello World'。

   ¥The reading will begin at the current position. For example, if the file already had 'Hello World' and six bytes are read with the file descriptor, the call to fs.readFile() with the same file descriptor, would give 'World', rather than 'Hello World'.