# notify_register_file_descriptor(_:_:_:_:) ``` func notify_register_file_descriptor(_ name: UnsafePointer!, _ notify_fd: UnsafeMutablePointer!, _ flags: Int32, _ out_token: UnsafeMutablePointer!) -> UInt32 ``` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)