Fuchsia distributes software in packages, which are hermetically sealed bundles of components, related files, and dependencies. Fuchsia packages are designed to be updated independently or even delivered ephemerally, which means they can come and go from the device as needed and the software is always up to date, like a web page.
Fuchsia aims to provide drivers with a binary-stable interface. In the future, drivers compiled for one version of Fuchsia will continue to work in future versions of Fuchsia without needing to be modified or even recompiled. This approach means that Fuchsia devices will be able to update to newer versions of Fuchsia seamlessly while keeping their existing drivers.
The component framework makes it easier to update the system as new software is created
The kernel has a minimal set of responsibilities, nearly everything else is in a user space component. Components are identified by URLs and can be resolved, downloaded, and executed on demand like the web. They are governed by the same mechanisms and they all work together. Hermetic packaging of components leads to more portable software.
Fuchsia Interface Definition Language (FIDL) enables loose coupling between components
Components exchange capabilities as defined by FIDL protocols. Software is composed at runtime through protocols rather than through static composition of libraries. Fuchsia has no system libraries. Even the C standard library (libc) is expressed as a dependency, delivered only when software needs it. Components can be swapped with another implementation as long they express the same FIDL protocol.
Fuchsia packages are the units of software distribution
All software is delivered in packages that can be updated independently and delivered on demand, like the web. This enables a vulnerability patch to be pushed to all Fuchsia products at once without the need for individual product coordination.
This section covers features on Fuchsia's roadmap.
Drivers and system services are designed as user space components that can be updated independently of the core OS
We are designing the system so that Fuchsia products can receive system updates without having to modify or recompile drivers. Drivers, system services, and end-user applications would be updated independently through the same mechanism, reducing the maintenance burden. Device owners could receive Fuchsia updates without having to update their drivers.
