interprocess

interprocess is a comprehensive interprocess communication (IPC) toolkit for Rust that exposes as many platform-specific IPC features as possible while keeping a uniform, portable interface across operating systems. It gives you cross-platform local sockets alongside lower-level primitives like unnamed pipes and Unix FIFO files, so programs on the same machine can talk to each other without going through the network stack.

Local sockets are the flagship abstraction: TCP-socket-like endpoints addressed by filesystem or namespaced paths, implemented with named pipes on Windows and Unix domain sockets on Unix. The crate supports both synchronous and asynchronous (Tokio) usage, letting you write correct, portable IPC code that still reaches native OS capabilities when you need them.

What You Get

• Cross-platform local sockets addressed by path instead of TCP port
• Unnamed pipes for private one-directional parent/child process communication
• Unix FIFO (named pipe) file support
• A uniform interface with both synchronous and Tokio async implementations

Common Use Cases

• Communicating between a desktop app and a helper or background process
• Coordinating a child process with its parent over a private pipe
• Building a single-instance app or daemon that accepts connections over a local socket

Under The Hood

Architecture - The crate layers portable abstractions over per-OS backends: src/local_socket defines the cross-platform local-socket API (name types, listeners, streams) that dispatches to Windows named pipes or Unix domain sockets under src/os, while src/unnamed_pipe and Unix FIFO support provide lower-level primitives. Shared plumbing lives in helpers like try_clone.rs, bound_util.rs, atomic_enum.rs, and a macros module (src/macros) that generates the parallel sync and async surfaces from common definitions; platform_check.rs guards target-specific compilation.

Tech Stack - Rust with an MSRV of 1.75, using raw OS handles/file descriptors through the standard library and platform crates, with optional Tokio integration to provide async listeners and streams. There is no native build step beyond conditional compilation per target under src/os.

Code Quality - The project is mature and heavily documented on docs.rs, with CI running checks and tests and a large single-maintainer commit history (nearly a thousand commits). It carries a dedicated error module and a passive-but-stable maintenance posture, and its scale of downloads (millions) reflects broad production use.

API Design - Local sockets intentionally mirror the standard library’s TCP socket ergonomics, so developers familiar with std::net can pick them up quickly. The uniform interface hides substantial platform divergence, and the parallel sync/async APIs let users choose a runtime model without learning a different shape; the main learning cost is understanding which primitive (local socket vs unnamed pipe vs FIFO) fits a given scenario.