## pf_lseek

The pf_lseek function moves the file read pointer of the open file.

    FRESULT pf_lseek (
      DWORD Offset       /* File offset in unit of byte */
    );

#### Parameters

Offset
  Number of bytes where from start of the file

#### Return Values

FR_OK (0)
  The function succeeded.
FR_DISK_ERR
  The function failed due to an error in the disk function, a wrong FAT structure or an internal error.
FR_NOT_OPENED
  The file has not been opened.

#### Description

The pf_lseek function moves the file read pointer of the open file. The offset can be specified in only origin from top of the file.

#### Example

        // Move to offset of 5000 from top of the file.
        res = pf_lseek(5000);

        // Forward 3000 bytes
        res = pf_lseek(fs.fptr + 3000);

        // Rewind 2000 bytes (take care on overflow)
        res = pf_lseek(fs.fptr - 2000);

#### QuickInfo

Available when `_USE_LSEEK == 1`.

#### References

`pf_open, FATFS`

Return