request_resource(9) [centos man page]

REQUEST_RESOURCE(9)						Hardware Interfaces					       REQUEST_RESOURCE(9)

NAME

       request_resource - request and reserve an I/O or memory resource

SYNOPSIS

       int request_resource(struct resource * root, struct resource * new);

ARGUMENTS

       root
	   root resource descriptor

       new
	   resource descriptor desired by caller

DESCRIPTION

       Returns 0 for success, negative error code on error.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						       REQUEST_RESOURCE(9)

EIO_DUP2(3)								 1							       EIO_DUP2(3)

eio_dup2 - Duplicate a file descriptor

SYNOPSIS

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

DESCRIPTION

       eio_dup2(3) duplicates file descriptor.

PARAMETERS

	      o $fd
		- Source stream, Socket resource, or numeric file descriptor

	      o $fd2
		- Target stream, Socket resource, or numeric file descriptor

	      o $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.

	      o $callback
		-$callback function is called when the request is done. It should match the following prototype:

	      void callback(mixed $data, int $result[, resource $req]);

		     o $data
		       -is custom data passed to the request.

		     o $result
		       -request-specific result value; basically, the value returned by corresponding system call.

		     o $req
		       -is optional request resource which can be used with functions like eio_get_last_error(3)

	      o $data
		- Arbitrary variable passed to $callback.

RETURN VALUES

       eio_dup2(3) returns request resource on success or FALSE on error.

PHP Documentation Group 													       EIO_DUP2(3)