fs.read(fd[, options], callback)

• fd <integer>

• options <Object>

  • buffer <Buffer> | <TypedArray> | <DataView> 默认值：Buffer.alloc(16384)

    ¥buffer <Buffer> | <TypedArray> | <DataView> Default: Buffer.alloc(16384)

  • offset <integer> 默认值：0

    ¥offset <integer> Default: 0

  • length <integer> 默认值：buffer.byteLength - offset

    ¥length <integer> Default: buffer.byteLength - offset

  • position <integer> | <bigint> | <null> 默认值：null

    ¥position <integer> | <bigint> | <null> Default: null

• callback <Function>

  • err <Error>

  • bytesRead <integer>

  • buffer <Buffer>

与 fs.read() 函数类似，此版本采用可选的 options 对象。如果未指定 options 对象，则默认使用上述值。

¥Similar to the fs.read() function, this version takes an optional options object. If no options object is specified, it will default with the above values.