nix

This gives you safe, idiomatic Rust wrappers instead of raw unsafe libc calls. That's the whole pitch.

The nix crate covers POSIX APIs across Linux, macOS, FreeBSD, and more. You get typed enums instead of integer constants, Result types instead of checking errno, and zero-cost abstractions over things like mmap, ioctl, and ptrace. It's been around since 2015 and is a dependency in hundreds of Rust projects.

Everything is free. MIT licensed, no paid tier, no cloud service. You add it to your Cargo.toml and go. Solo developers building anything systems-level in Rust should already have this in their toolkit. Teams don't need to coordinate around it. It's a library, not infrastructure.

The catch: it's Unix-only. Windows developers need something else entirely. And the API surface is massive. Not everything is equally well-documented. You'll occasionally hit a function that sends you straight to the man pages.