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Truly independent web browser
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Liav A 446200d6f3 Kernel+Services: Enable barebones hot-plug handling capabilities 
Userspace initially didn't have any sort of mechanism to handle
device hotplug (either removing or inserting a device).
This meant that after a short term of scanning all known devices, by
fetching device events (DeviceEvent packets) from /dev/devctl, we
basically never try to read it again after SystemServer initialization
code.

To accommodate hotplug needs, we change SystemServer by ensuring it will
generate a known set of device nodes at their location during the its
main initialization code. This includes devices like /dev/mem, /dev/zero
and /dev/full, etc.

The actual responsible userspace program to handle hotplug events is a
new userspace program called DeviceMapper, with following key points:
- Its current task is to to constantly read the /dev/devctl device node.
  Because we already created generic devices, we only handle devices
  that are dynamically-generated in nature, like storage devices, audio
  channels, etc.

- Since dynamically-generated device nodes could have an infinite minor
  numbers, but major numbers are decoded to a device type, we create an
  internal registry based on two structures - DeviceNodeFamily, and
  RegisteredDeviceNode. DeviceNodeFamily objects are attached in the
  main logic code, when handling a DeviceEvent device insertion packet.
  A DeviceNodeFamily object has an internal HashTable to hold objects of
  RegisteredDeviceNode class.

- Because some device nodes could still share the same major number (TTY
  and serial TTY devices), we have two modes of allocation - limited
  allocation (so a range is defined for a major number), or infinite
  range. Therefore, two (or more) separate DeviceNodeFamily objects can
  can exist albeit sharing the same major number, but they are required
  to allocate from a different minor numbers' range to ensure there are
  no collisions.

- As for KCOV, we handle this device differently. In case the user
  compiled the kernel with such support - this happens to be a singular
  device node that we usually don't need, so it's dynamically-generated
  too, and because it has only one instance, we don't register it in our
  internal registry to not make it complicated needlessly.

The Kernel code is modified to allow proper blocking in case of no
events in the DeviceControlDevice class, because otherwise we will need
to poll periodically the device to check if a new event is available,
which would waste CPU time for no good reason.
2023-09-07 11:50:50 -06:00
.devcontainer Meta: Switch to clang-format-16 as the standard formatter 2023-07-08 10:32:56 +01:00
.github CI: Specify SERENITY_CACHE_DIR for test262 job 2023-08-14 15:37:02 -04:00
AK AK: Add AK_OS_GNU_HURD :^) 2023-09-06 11:41:16 -06:00
Base Maps: Add Application Icons 2023-09-05 14:13:32 +02:00
Documentation Documentation: Fix ladybird executable path 2023-09-06 21:09:13 +02:00
gradle/wrapper Ladybird: Add new template Kotlin Android application without Qt 2023-09-03 11:38:51 +02:00
Kernel Kernel+Services: Enable barebones hot-plug handling capabilities 2023-09-07 11:50:50 -06:00
Ladybird LibWeb: Make FontPlugin::generic_font_name() return FlyString 2023-09-06 11:29:03 -04:00
Meta LibWeb: Port DOMException interface from DeprecatedString to String 2023-09-06 11:44:45 -04:00
Ports Ports: Add giflib 2023-09-07 19:35:54 +02:00
Tests Tests, LibTest: Implement disabling core dumps on GNU Hurd 2023-09-06 11:41:16 -06:00
Toolchain Toolchain: Add Toolchain/nix-profiles/ to .gitignore 2023-09-01 11:52:04 +02:00
Userland Kernel+Services: Enable barebones hot-plug handling capabilities 2023-09-07 11:50:50 -06:00
.clang-format Meta: Support using clang-format on Objective-C++ files 2023-08-22 21:36:19 -04:00
.clang-tidy Meta: Disable misc-use-anonymous-namespace clang-tidy warning 2023-08-23 12:25:40 +01:00
.editorconfig Meta: Add .editorconfig 2022-09-10 17:32:55 +01:00
.gitattributes Repository: Protect port patches from CRLF/LF normalization 2022-01-12 01:08:38 +01:00
.gitignore Ladybird: Add new template Kotlin Android application without Qt 2023-09-03 11:38:51 +02:00
.gn Meta: Add the start of a gn build based on the LLVM gn build 2023-07-09 16:22:58 -06:00
.mailmap Everywhere: Update copyrights with my new serenityos.org e-mail :^) 2023-07-15 16:21:29 +02:00
.pre-commit-config.yaml Meta: Add a post-commit commit message linter hook 2021-05-02 16:28:01 +02:00
.prettierignore LibJS: Add DisposableStack{, Prototype, Constructor} 2023-01-23 09:56:50 +00:00
.prettierrc Meta: Move prettier config files to the root of the repository 2020-08-24 18:21:33 +02:00
.ycm_extra_conf.py Meta: Remove i686 references in YCM configuration 2022-12-28 11:53:41 +01:00
azure-pipelines.yml CI: Remove extraneous toolchain job from Azure CI 2022-12-28 15:26:12 -05:00
build.gradle.kts Ladybird: Add new template Kotlin Android application without Qt 2023-09-03 11:38:51 +02:00
CMakeLists.txt CMake: Add UNDEFINED_BEHAVIOR_IS_FATAL configure option 2023-08-13 05:14:07 +02:00
CONTRIBUTING.md Docs: Use the term 'amend' instead of 'squash' in CONTRIBUTING.md 2023-08-09 07:28:06 -04:00
gradle.properties Ladybird: Add new template Kotlin Android application without Qt 2023-09-03 11:38:51 +02:00
gradlew Ladybird: Add new template Kotlin Android application without Qt 2023-09-03 11:38:51 +02:00
LICENSE Meta: Update the year range in LICENSE :^) 2023-01-01 09:38:07 +00:00
README.md Meta: Add Andi Gallo to the contributors list :^) 2023-08-14 13:10:08 -06:00
SECURITY.md Meta: Add a security policy 2022-06-29 03:29:27 +00:00
settings.gradle.kts Ladybird: Add new template Kotlin Android application without Qt 2023-09-03 11:38:51 +02:00

README.md

SerenityOS

Graphical Unix-like operating system for x86-64 computers.

GitHub Actions Status Azure DevOps Status Fuzzing Status Sonar Cube Static Analysis Discord

FAQ | Documentation | Build Instructions

About

SerenityOS is a love letter to '90s user interfaces with a custom Unix-like core. It flatters with sincerity by stealing beautiful ideas from various other systems.

Roughly speaking, the goal is a marriage between the aesthetic of late-1990s productivity software and the power-user accessibility of late-2000s *nix. This is a system by us, for us, based on the things we like.

You can watch videos of the system being developed on YouTube:

Screenshot

Screenshot as of c03b788.png

Features

  • Modern x86 64-bit kernel with pre-emptive multi-threading
  • Browser with JavaScript, WebAssembly, and more (check the spec compliance for JS, CSS, and Wasm)
  • Security features (hardware protections, limited userland capabilities, W^X memory, pledge & unveil, (K)ASLR, OOM-resistance, web-content isolation, state-of-the-art TLS algorithms, ...)
  • System services (WindowServer, LoginServer, AudioServer, WebServer, RequestServer, CrashServer, ...) and modern IPC
  • Good POSIX compatibility (LibC, Shell, syscalls, signals, pseudoterminals, filesystem notifications, standard Unix utilities, ...)
  • POSIX-like virtual file systems (/proc, /dev, /sys, /tmp, ...) and ext2 file system
  • Network stack and applications with support for IPv4, TCP, UDP; DNS, HTTP, Gemini, IMAP, NTP
  • Profiling, debugging and other development tools (Kernel-supported profiling, detailed program analysis with software emulation in UserspaceEmulator, CrashReporter, interactive GUI playground, HexEditor, HackStudio IDE for C++ and more)
  • Libraries for everything from cryptography to OpenGL, audio, JavaScript, GUI, playing chess, ...
  • Support for many common and uncommon file formats (PNG, JPEG, GIF, MP3, WAV, FLAC, ZIP, TAR, PDF, QOI, Gemini, ...)
  • Unified style and design philosophy, flexible theming system, custom (bitmap and vector) fonts
  • Games (Solitaire, Minesweeper, 2048, chess, Conway's Game of Life, ...) and demos (CatDog, Starfield, Eyes, mandelbrot set, WidgetGallery, ...)
  • Every-day GUI programs and utilities (Spreadsheet with JavaScript, TextEditor, Terminal, PixelPaint, various multimedia viewers and players, Mail, Assistant, Calculator, ...)

... and all of the above are right in this repository, no extra dependencies, built from-scratch by us :^)

Additionally, there are over two hundred ports of popular open-source software, including games, compilers, Unix tools, multimedia apps and more.

How do I read the documentation?

Man pages are available online at man.serenityos.org. These pages are generated from the Markdown source files in Base/usr/share/man and updated automatically.

When running SerenityOS you can use man for the terminal interface, or help for the GUI.

Code-related documentation can be found in the documentation folder.

How do I build and run this?

See the SerenityOS build instructions. Serenity runs on Linux, macOS (aarch64 might be a challenge), Windows (with WSL2) and many other *Nixes with hardware or software virtualization.

Get in touch and participate!

Join our Discord server: SerenityOS Discord

Before opening an issue, please see the issue policy.

A general guide for contributing can be found in CONTRIBUTING.md.

Authors

And many more! See here for a full contributor list. The people listed above have landed more than 100 commits in the project. :^)

License

SerenityOS is licensed under a 2-clause BSD license.