Show HN: Munal OS: a graphical experimental OS with WASM sandboxing

a year ago

Munal OS is an experimental operating system written entirely in Rust with a unikernel design.
It features a fully graphical interface in HD resolution with mouse and keyboard support.
Applications are sandboxed using WASM, ensuring security and memory separation.
The OS includes a network driver, TCP stack, and a customizable UI toolkit.
Embedded applications include a web browser, text editor, and Python terminal.
Munal OS does not implement traditional OS features like bootloaders, page mapping, virtual address space, or interrupts.
It runs as a single EFI binary, utilizing UEFI boot services minimally.
The OS relies on VirtIO drivers for input, network, and GPU, making it currently limited to QEMU.
Performance is monitored via a global event loop, with cooperative scheduling for applications.
The UI toolkit, Uitk, supports immediate mode rendering and basic widgets with customizable styling.
Munal OS uses Wasmi for WASM execution, providing a custom system call API instead of WASI standards.
The project is built with Rust Nightly 2025-06-01 and requires specific Rust components for compilation.
Acknowledgments include Philipp Oppermann's Rust OS tutorial and various open-source projects.

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