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)

Zircon Core

• Device Manager & Device Hosts
• Device Driver Model (DDK)
• C Library (libc)
• POSIX I/O (libfdio)
• Process Creation

Framework

• Core Libraries
• Application model
  • Interface definition language (FIDL)
  • Services
  • Environments
• Boot sequence
• Components
• Sessions
• Namespaces
• Sandboxing

Storage

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

Networking

• Ethernet
• Wireless
• Bluetooth
• Telephony
• Sockets
• HTTP

Graphics

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

Components

• Component framework

Media

• Audio
• Video
• DRM

Backwards compatibility

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

Update and recovery

• Software Update System
• Verified boot
• Updater

USB

• USB Request Life cycle
• USB mass storage driver
• Testing
• Getting descriptors and endpoints

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