Popisbool dio_truncate ( resource fd, int offset )
dio_truncate() truncates a file to at most
offset bytes in size.
If the file previously was larger than this size, the extra data is lost. If the file previously was shorter, it is unspecified whether the file is left unchanged or is extended. In the latter case the extended part reads as zero bytes.
Poznámka: Tato funkce není implementována na platformách Windows.
The file descriptor returned by dio_open().
The offset in bytes.