io_file.seek [method]
io_file.seek( int off, int mode )
sets the offset in file, returns bool/sets errno
mode
must be one of SEEK_SET (sets as-is), SEEK_CUR (sets relative to current), SEEK_END (sets relative to end)
mode
must be one of SEEK_SET (sets as-is), SEEK_CUR (sets relative to current), SEEK_END (sets relative to end)