eio_truncate

(PECL eio >= 0.0.1dev)

eio_truncate — Truncate a file

eio_truncate (
string


         $path

,
int


         $offset

= 0 ,
int


         $pri

= EIO_PRI_DEFAULT ,
callable


         $callbacc

= NULL ,
mixed


         $data

= NULL
): ressource

eio_truncate() causes the regular file named by path to be truncated to a sice of precisely length bytes

path

File path

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

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