CappuccinOS

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CappuccinOS is a small next generation x86-64 operating system written from scratch in Rust. This README will guide you through the process of building and running CappuccinOS.

Warning

This project is in early development. Things will change.

Features

• Serial output
• Hardware interrupts
• Heap allocation
• Externalized kernel modules
  • Initramfs
    • Squashfs driver
      • Programmatic reads
      • Decompression
• PS/2 Keyboard support
• ANSI color codes in console
• SMP
  • Use APIC instead of PIC
• Pre-emptive multitasking
  • Scheduling
• File system
  • FAT file system (read-only rn)
  • Ext2 file system
• Block Device support
  • IDE device support
  • SATA device support
  • MMC/Nand device support
  • M.2 NVME device support
• Basic shell
  • Basic I/O
    • Executing Programs from disk
• Lua interpreter
• Memory management
• Network support
• GUI
• Device drivers
  • Native intel graphics
• User authentication
• Power management
• Paging
• RTC Clock

Setup

Before building CappuccinOS, make sure you have the following installed on your machine:

• rust
• python
• sgdisk
• dosfstools
• squashfs-tools
• qemu (optional)

Clone the repo:

git clone https://github.com/juls0730/CappuccinOS.git
cd CappuccinOS

Install rust, if you haven't already:

curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain none

Install the dependencies:

Arch

sudo pacman -S gptfdisk dosfstools squashfs-tools python
# Optionally
sudo pacman -S qemu-system-x86

Ubuntu

# Python should be installed by default, and if it's not, make an issue or a PR and I'll fix it

sudo apt install gdisk dosfstools squashfs-tools
# Optionally
sudo apt install qemu

Usage

Run CappuccinOS with QEMU:

make run

If you would like to just build CappuccinOS but not run it:

make build

If you would like to target another architecture other than x86_64, set the ARCH variable to the a supported architecture. CappuccinOS is also built in release mode by default, if you would like to build CappuccinOS in debug mode, set the MODE variable to debug.

Run on a bare metal machine by flashing to a USB stick or hard drive:

sudo dd if=bin/CappuccinOS.iso of=/dev/sdX bs=1M && sync

Be careful not to overwrite your hard drive when using dd!

Supported Architectures

• x86_64
• aarch64 not in scope might not build
• RISC-V64 not in scope might not build

Credits an attributions

Inspiration was mainly from JDH's Tetris OS, mixed with a growing interest in low level in general and an interest in learning rust (yeah, I started this project with not that much rust experience, maybe a CLI app or two, and trust me it shows).

Some Resources I used over the creation of CappuccinOS:

• OSDev wiki
• Wikipedia on various random things
• Squashfs Binary Format
• GRUB Mainly for Squashfs things, even though I later learned it does things incorrectly

And mostly for examples of how people did stuff I used these (projects made by people who might actually have a clue what they're doing):

• This is missing some entries somehow
• MOROS
• Felix
• mOS
• rust_os
• Lyre
• Limine as my paging implementation is largely a rust translation of its

Copyright (C) 2019-2024 mintsuki and contributors.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

License

CappuccinOS is license under the MIT License. Feel free to modify and distribute in accordance with the license.