# withFileStream(fd:automaticClose:_:) Calls the given closure with a file stream created from the specified file descriptor. ``` static func withFileStream(fd: FileDescriptor, automaticClose: Bool = true, _ body: (ArchiveByteStream) throws -> E) throws -> E ``` ## Parameters `fd` The file descriptor that you have previously opened with `open(2)`. `automaticClose` A Boolean value that specifies whether to close the file descriptor when you close the stream. `body` A closure with the archive byte stream passed as a parameter. ## Return Value The result of the closure. --- 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)