(PECL eio >= 0.0.1dev)
eio_dup2 — Duplicate a file descriptor
$fd
, int $fd2
[, int $pri
= EIO_PRI_DEFAULT
[, callable $callback
= NULL
[, mixed $data
= NULL
]]] )eio_dup2() duplicates file descriptor.
fd
Source file descriptor
fd2
Target file descriptor
pri
The request priority: EIO_PRI_DEFAULT
, EIO_PRI_MIN
, EIO_PRI_MAX
, or NULL
.
If NULL
passed, pri
internally is set to
EIO_PRI_DEFAULT
.
callback
callback
function is called when the request is done.
It should match the following prototype:
void callback($data, $result);
$data
is custom
data passed to the request.
$result
contains
request-specific result value; basically, the value returned by corresponding
system call.
data
Arbitrary variable passed to callback
.
eio_dup2() returns request resource on success or FALSE
on error.