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# Luna
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A simple POSIX-based operating system for personal computers, written in C++.
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## Another UNIX clone?
[Yes, another UNIX clone ](https://wiki.osdev.org/User:Sortie/Yes_Another_Unix_Clone ).
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## Features
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- x86_64-compatible lightweight [kernel ](kernel/ ).
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- Simple round-robin [scheduler ](kernel/src/thread/ ).
- Read-only [ext2 ](kernel/src/fs/ext2/ ) filesystem.
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- Can [load ELF programs ](kernel/src/binfmt/ELF.cpp ), [shebang scripts ](kernel/src/binfmt/Script.cpp ) or [arbitrary binary formats ](kernel/src/binfmt/BinaryFormat.h ) (registered through kernel modules, which are not supported yet =D).
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- [C Library ](libc/ ), aiming for POSIX compatibility, with many features such as local domain sockets, signals, and shared memory.
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- Support for [several third-party programs ](ports/ ), including the [GNU binutils ](ports/binutils/PACKAGE ) suite of utilities.
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- Designed to be [portable ](kernel/src/arch ), no need to be restricted to x86_64.
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- Everything is designed around [UTF-8 ](libluna/include/luna/Utf8.h ).
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- Environment-agnostic [utility library ](libluna/ ), which can be used in both kernel and userspace.
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- An extensive set of [standard Unix utilities ](apps/ ), from [ls ](apps/ls.cpp ) to [uname ](apps/uname.cpp ) to [base64 ](apps/base64.cpp ). Written in modern C++ and very small amounts of code, using Luna's practical [OS library ](libos/ ).
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- A simple and efficient [windowing system ](wind/ ), providing a lightweight GUI environment (still in development, not many GUI apps exist).
## Screenshot
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## Setup
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To build and run Luna, you will need to build a [cross-compiler ](https://wiki.osdev.org/Why_do_I_need_a_Cross_Compiler ) and cross-binutils for `x86_64-luna` .
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For this, you should start by installing the [required dependencies ](https://wiki.osdev.org/GCC_Cross_Compiler#Installing_Dependencies ).
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Then, run `tools/setup.sh` to build the toolchain.
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Please beware that building GCC and Binutils can take some time, depending on your machine.
## Running
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To run Luna in a virtual machine, you should have [QEMU ](https://www.qemu.org/ ) installed.
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Additionally, the build process needs some extra dependencies to run: `cmake` , `ninja` , `nasm` , `fakeroot` and `genext2fs` .
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`tools/run.sh` is the script you should use in most cases. It will build changed files, install, make an ISO image, and run Luna in QEMU.
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If you have no toolchain set up, `run.sh` will build it automatically, which means that you don't necessarily have to run `setup.sh` manually since `run.sh` does it for you.
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## Prebuilt images
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Prebuilt ISO images for every release version can be found at [pub.cloudapio.eu ](https://pub.cloudapio.eu/luna/releases ).
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## Is there third-party software I can use on Luna?
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Yes! A ports system is in place, and you can use the build scripts to add some ports to your image. More information in the [Ports ](ports/README.md ) page.
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## License
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Luna is open-source and free software under the [BSD-2-Clause License ](LICENSE ).
