Transfer data between file descriptors

Description

resource eio_sendfile ( int $out_fd , int $in_fd , int $offset , int $length [, int $pri [, callable $callback [, string $data ]]] )

eio_sendfile() copies data between one file descriptor and another. See SENDFILE(2) man page for details.

Parameters

out_fd

Output file descriptor. Should be opened for writing.

in_fd

Input file descriptor. Should be opened for reading.

offset

Offset within the source file.

length

Number of bytes to copy.

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.

Return Values

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