php man page for eio_truncate

EIO_TRUNCATE(3) 							 1							   EIO_TRUNCATE(3)

eio_truncate - Truncate a file

SYNOPSIS
       resource eio_truncate (string  $path, [int  $offset], [int  $pri = EIO_PRI_DEFAULT], [callable  $callback = NULL], [mixed  $data = NULL])

DESCRIPTION
       eio_truncate(3) causes the regular file named by $path to be truncated to a size of precisely $length bytes

PARAMETERS
	      o $path
		- File path

	      o $offset
		- Offset from beginning of the file.

	      o $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.

	      o $callback
		-$callback function is called when the request is done. It should match the following prototype:

	      void callback(mixed $data, int $result[, resource $req]);

		     o $data
		       -is custom data passed to the request.

		     o $result
		       -request-specific result value; basically, the value returned by corresponding system call.

		     o $req
		       -is optional request resource which can be used with functions like eio_get_last_error(3)

	      o $data
		- Arbitrary variable passed to $callback.

RETURN VALUES
       eio_busy(3) returns request resource on success or FALSE on error.

SEE ALSO eio_ftruncate.
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