Fseek

Change the current position in the file. You can either seek forward or backward through the file.

Parameters:

(File:handle, position, whence)

handle

The File handle to use, earlier opened by fopen().

position

The new position in the file, relative to the parameter whence.

whence

The starting position to which parameter position relates.

Returns

The new position, relative to the start of the file.

Note: To get the current file position without changing it, set the position

parameter to zero and whence to seek_current.

Whences

seek_start

Set the file position relative to the start of the file (the position parameter must be positive).

seek_current

Set the file position relative to the current file position: the position parameter is added to the current position.

seek_end

Set the file position relative to the end of the file (parameter position must be zero or negative).

The following functions may be useful, as they are related to this function in one way or another.