# OSLogInt32ExtendedFormat.darwinMode A format that displays a 32-bit integer as a Darwin file mode. ``` case darwinMode ``` ## Discussion Use this option to format the interpolated value as a Darwin file mode, such as `-rwx------`. Because Darwin uses octal values to represent file modes numerically, pass an octal literal to the formatter. Alternatively, convert the octal value to its 32-bit integer equivalent and interpolate that instead. For more information about using octal literals, see [Numeric Literals](https://docs.swift.org/swift-book/LanguageGuide/TheBasics.html#ID323). The following example formats the octal literal `0o700` using the `darwinMode` formatter: ```swift // Create a logger with the specified subsystem and category. let logger = Logger(subsystem: "com.example.OSLogValueFormatting", category: "Formatter Output") // Darwin uses octal values to represent file modes. Use Swift's // support for octal literals to assign a file mode to a 32-bit // integer variable. let value: Int32 = 0o700 // Write the value to the log using the specified format. logger.info(".darwinMode output is \(value, format: .darwinMode)") ``` And the system writes the following message to the log: ``` [Formatter Output] .darwinMode formats the value as -rwx------ ``` --- 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)