RIM Pre-release Engine 15 Crates
Disk synthesis from browser to bare metal.
Build Linux in your browser. Then boot it. RIM is a portable, pure-Rust storage engine that formats partition tables (GPT) and genuine filesystems (FAT, EXT, NTFS, exFAT, TAR, ZIP, ISO) entirely in memory. Zero mkfs, zero mount, and zero server-side generation.
⚡ 100% In-Memory (No root/mount)
🦀 Pure Rust (
no_std + alloc)
🌐 WebAssembly Client-Side
🖥️ In-Browser x86_64 UEFI Boot
Current Engine Surface
15 crates · shared test spine
Disk Layout
GPT synthesis, validation, and host/browser/UEFI I/O backends.
Filesystems
FAT, EXT, NTFS, exFAT, TAR, ZIP, and ISO engines.
Lazy Access
Extent-backed file reads avoid materializing archive and disk payloads up front.
Quality Gate
Common filesystem tests, corruption tripwires, examples, benches, Clippy.
Interactive Storage Synthesizer
WASM Linear Memory Heap
Instant in-memory synthesis of a dual-partition GPT disk image with FAT32 and EXT4 in ~20 milliseconds.
Target Disk Layout: 64 MiB GPT
2 Partitions
| Partition | Filesystem | Size | Injected Payloads |
|---|---|---|---|
| ESP (Boot) | FAT32 |
32 MiB | /README.TXT |
| data | EXT4 |
24 MiB | /hello.txt, /etc/rim.conf, /hello_link (symlink) |
Live Engine Log
Initializing RIM WebAssembly module...
Unified Architecture: Host, Browser & Firmware
RIM decouples raw I/O execution from partition and filesystem layout logic. The exact same synthesis engine runs across native host CLI, in-browser WebAssembly, and bare-metal UEFI firmware:
HOST OS ───> FileRimIO / MmapRimIO ───┐
BROWSER ───> MemRimIO (WebAssembly) ───┼──> rimgen (build_on_io) ──> rimpart (GPT) + rimfs-* (FAT/EXT/NTFS/exFAT/TAR/ZIP/ISO)
UEFI FIRMWARE ───> UefiRimIO (Block I/O) ───┘
| Filesystem | Target Formats | Capabilities | Status |
|---|---|---|---|
| FAT | FAT12, FAT16, FAT32, RimFAT | VBR, FSInfo, FAT tables, LFN, 64-bit clusters | VALIDATED |
| EXT | EXT2, EXT3, EXT4 | Superblock, BGDT, 48-bit extents, fast/slow symlinks, flex_bg | VALIDATED |
| NTFS | NTFS 3.1 | $Boot, $MFT, $LogFile, non-resident $UpCase, $Secure, B-tree $I30 | VALIDATED |
| exFAT | exFAT 1.00 | VBR, Main/Backup boot, UpCase table, Allocation bitmap | VALIDATED |
| TAR | POSIX UStar | 512B headers, octal encoding, streaming injection & extraction | VALIDATED |
| ZIP | ZIP / ZIP64 | Central Directory, CRC-32, Store/Deflate plumbing, POSIX metadata | VALIDATED |
| ISO | ISO 9660, Joliet, Rock Ridge, El Torito | Optical and hybrid disk images with lazy extent-backed reads | VALIDATED |