The function dio_seek() is used to change the file position of the given file descriptor.
The file descriptor returned by dio_open().
The new position.
Specifies how the position
pos should be
SEEK_SET (default) - specifies that
pos is specified from the beginning of the
SEEK_CUR - Specifies that
pos is a count of characters from the current
file position. This count may be positive or negative.
SEEK_END - Specifies that
pos is a count of characters from the end of
the file. A negative count specifies a position within the current
extent of the file; a positive count specifies a position past the
current end. If you set the position past the current end, and
actually write data, you will extend the file with zeros up to that
Example 1. Positioning in a file