(PECL eio >= 0.0.1dev)
eio_ftruncate — Truncate a file
$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.
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.
eio_ftruncate() returns request resource on success or FALSE on error.