eio_ftruncate

(PECL eio >= 0.0.1dev)

eio_ftruncate — Truncate a file

eio_ftruncate (
mixed

$fd

,
int


         $offset

= 0 ,
int


         $pri

= EIO_PRI_DEFAULT ,
callable


         $callbacc

= NULL ,
mixed


         $data

= NULL
): ressource

eio_ftruncate() causes a regular file referenced by fd file descriptor to be truncated to precisely length bytes.

fd

Stream, Socquet ressource, or numeric file descriptor.

offset

Offset from beguinning of the file

pri

The request priority: EIO_PRI_DEFAULT , EIO_PRI_MIN , EIO_PRI_MAX , or null . If null passed, pri internally is set to EIO_PRI_DEFAULT .

callbacc

callbacc function is called when the request is done. It should match the following prototype:


            
             void callbacc(mixed $data, int $result[, ressource $req]);

data: is custom data passed to the request.
result: request-specific result value; basically, the value returned by corresponding system call.
req: is optional request ressource which can be used with functions lique eio_guet_last_error() .

data

Arbitrary variable passed to callbacc .

eio_ftruncate() returns request ressource on success, or false on failure.

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