Hadris

A Rust workspace for working with partition tables, filesystems, and disk images. Designed for no-std compatibility, embedded systems, and bootloaders.

Workspace Crates

Core Libraries

• hadris-io - No-std I/O abstraction layer (Read, Write, Seek traits)
• hadris-common - Shared utilities (endian types, CRC, UTF-16 strings)

Partition Tables

• hadris-part - Partition table support
  • MBR (Legacy BIOS partition tables)
  • GPT (Modern UEFI partition tables)
  • Hybrid MBR (Combined MBR+GPT for dual BIOS/UEFI boot)

Filesystems

• hadris-iso - ISO 9660 filesystem implementation

  • ISO 9660 Level 1-3 and ISO 9660:1999 (long filenames)
  • Joliet extension (UTF-16 Unicode filenames)
  • Rock Ridge (RRIP) and SUSP (POSIX semantics, symlinks)
  • El-Torito bootable CD/DVD images

• hadris-fat - FAT filesystem implementation

  • FAT12, FAT16, FAT32 support
  • Long filename support (VFAT/LFN)
  • FAT sector caching for performance
  • Analysis and verification tools
  • ExFAT support (experimental)

CLI Tools

• hadris-iso-cli - Command-line tool for ISO operations
• hadris-fat-cli - Command-line tool for FAT operations
• hadris-cli - General-purpose disk utility CLI (WIP)

Meta-crate

• hadris - Re-exports all filesystem implementations

Key Features

• No-std compatible - Use in bootloaders, kernels, and embedded systems
• Configurable - Feature flags for read-only, write support, and extensions
• Comprehensive - Support for multiple partition schemes and filesystem extensions
• Standards compliant - Follows ECMA-119, IEEE P1282, El-Torito, and Microsoft FAT specifications

Quick Start

Add dependencies to your Cargo.toml:

[dependencies]
hadris-iso = "0.2"
hadris-fat = "0.3"
hadris-part = "0.2"

For no-std environments:

[dependencies]
hadris-iso = { version = "0.2", default-features = false, features = ["read"] }
hadris-fat = { version = "0.3", default-features = false, features = ["read"] }

Building

# Build entire workspace
cargo build --workspace

# Run tests
cargo test --workspace

# Build for no-std (example)
cargo build -p hadris-fat --no-default-features --features "read"

See CLAUDE.md for detailed build instructions and architecture notes.

License

Licensed under the MIT license.