Fuchsia is not Linux

A modular, capability-based operating system

This document is a collection of articles describing the Fuchsia operating system, organized around particular subsystems. Sections will be populated over time.

Zircon Kernel

Zircon is the microkernel underlying the rest of Fuchsia. Zircon also provides core drivers and Fuchsia's libc implementation.

• Concepts
• System Calls / VDSO (libzircon)
• Boot Sequence

Zircon Core

• Device Manager & Device Hosts
• Device Driver Model (DDK)
• C Library (libc)
• POSIX I/O (libfdio)
• Process Start / ELF Loading (liblaunchpad)

Framework

• Core Libraries
• Application model
  • Interface definition language (FIDL)
  • Services
  • Environments
• Boot sequence
• Device, user, and story runners
• Components
• Namespaces
• Sandboxing
• Story
• Module
• Agent
• Links

Storage

• Block devices
• File systems
• Directory hierarchy
• Ledger
• Document store
• Application cache

Networking

• Ethernet
• Wireless
• Bluetooth
• Sockets
• HTTP

Graphics

• Magma (vulkan driver)
• Escher (physically-based renderer)
• Scenic (compositor)
• Input manager
• View manager
• Flutter (UI toolkit)

Media

• Audio
• Video
• DRM

Intelligence

• Context
• Agent Framework
• Suggestions

User interface

• Device, user, and story shells
• Stories and modules

Backwards compatibility

• POSIX lite (what subset of POSIX we support and why)
• Web runtime

Update and recovery

• Verified boot
• Updater