oc-rsync: Pure Rust Implementation of rsync

oc-rsync offers a comprehensive re-implementation of the classic rsync in pure Rust, ensuring wire compatibility with upstream rsync version 3.4.1 (protocol 32). As a drop-in replacement, it allows seamless integration alongside the system's existing rsync.

Key Features

• Fully Functional Transfers: Supports local, SSH, and daemon file transfers with a native delta algorithm.
• Metadata Preservation: Ensures that all core options, including metadata, are preserved during transfers.
• Interoperability: Tested against multiple upstream rsync versions, ensuring compatibility.

Performance

oc-rsync employs a threaded architecture, replacing the traditional fork-based pipeline used in upstream rsync. This design choice minimizes system call overhead and context switching, resulting in enhanced performance for local transfers.

Benchmark Results

Usage

The command-line interface is designed to be user-friendly, mirroring the functionality of rsync. Examples include:

# Local sync
oc-rsync -av ./source/ ./dest/

# Remote pull
oc-rsync -av user@host:/remote/path/ ./local/

# Remote push
oc-rsync -av ./local/ user@host:/remote/path/

# Daemon mode
oc-rsync --daemon --config=/etc/oc-rsyncd/oc-rsyncd.conf

For a full list of supported options, run oc-rsync --help.

Development

To contribute to the project, ensure the following prerequisites are in place:

• Rust version 1.88.0 or higher.
• Install cargo-nextest for enhanced testing capabilities.

Project Structure

The project is organized into several crates, each handling a specific functionality:

• cli/: Manages command-line flags and output formatting.
• core/: Facilitates orchestration and session management.
• daemon/: Handles the daemon mode operations, including access control.

For complete API documentation, refer to cargo doc --workspace --no-deps --open.

Security

oc-rsync adheres to strict security measures, enforcing safety across protocol parsing and minimizing the use of unsafe code. Known vulnerabilities from upstream rsync are addressed, ensuring a secure file transfer environment. For detailed security practices, refer to SECURITY.md.

Contributing

Contributions are encouraged; potential contributors should fork the repository, create a feature branch, and adhere to coding standards prior to submitting a pull request.