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Duplicate a file descriptor


eio_dup2

(PECL eio >= 0.0.1dev)

eio_dup2Duplicate a file descriptor

Description

resource eio_dup2 ( mixed $fd , int $fd2 [, int $pri = EIO_PRI_DEFAULT [, callable $callback = NULL [, mixed $data = NULL ]]] )

eio_dup2() duplicates file descriptor.

Parameters

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(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_dup2() returns request resource on success or FALSE on error.



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