eio_ftruncate
(PECL eio >= 0.0.1dev)
eio_ftruncate — Truncate a file
Description
resource eio_ftruncate ( mixed $fd [, int $offset = 0 [, int $pri = EIO_PRI_DEFAULT [, callable $callback = NULL [, mixed $data = NULL ]]]] ) eio_ftruncate() causes a regular file referenced by fd file descriptor to be truncated to precisely length bytes.
Parameters
fd
Stream, Socket resource, or numeric file descriptor.
offset
Offset from beginning 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.
callback
callback function is called when the request is done. It should match the following prototype:
void callback(mixed $data, int $result[, resource $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 resource which can be used with functions like eio_get_last_error()
`data` Arbitrary variable passed to callback.
Return Values
eio_ftruncate() returns request resource on success or FALSE on error.
See Also
- eio_truncate
← eio_fsync
eio_futime →
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