Short version for non-lawyers: `rustix` is triple-licensed under Apache 2.0 with the LLVM Exception, Apache 2.0, and MIT terms. Longer version: Copyrights in the `rustix` project are retained by their contributors. No copyright assignment is required to contribute to the `rustix` project. Some files include code derived from Rust's `libstd`; see the comments in the code for details. Except as otherwise noted (below and/or in individual files), `rustix` is licensed under: - the Apache License, Version 2.0, with the LLVM Exception <LICENSE-Apache-2.0_WITH_LLVM-exception> or <http://llvm.org/foundation/relicensing/LICENSE.txt> - the Apache License, Version 2.0 <LICENSE-APACHE> or <http://www.apache.org/licenses/LICENSE-2.0>, - or the MIT license <LICENSE-MIT> or <http://opensource.org/licenses/MIT>, at your option.