BeeOS

README

A simple and minimal "Unix-like" kernel trying to be POSIX compliant. (at least with regard to the implemented services).

The kernel is NOT STABLE and is a discontinuous work mainly used as a didactical tool for operating systems and low level programming.

Because of it's simplicity it can be used as a trampoline to start digging with common operating system problems. Once you've mastered the BeeOS sources it will be a lot easier to start hacking with more complex projects like Linux.

Prerequisites

• gcc
• binutils
• make
• qemu (qemu-system-x86)

Quickstart

1. make all

   This command will build the kernel, standard library (libc), user utility library (libu) and user applications.

2. (cd misc && sudo ./mkfs.sh)

   Creates the root filesystem ramdisk with the user applications.

3. (cd misc && ./qemu.sh)

   Starts qemu and BeeOS.

Implemented Milestones

Supported Architectures

- x86

Core

- Multitasking
- Syscalls
- Virtual Memory
- Virtual File System (ext2 and custom initrd)
- SLAB  allocator
- Buddy allocator
- Timer queues

IPC

- Signals
- Pipes
- System V messages

Synchronization

- Spinlocks
- Wait queues

Drivers

- TTY
- Screen
- Ramdisk
- Keyboard

Other

- Multi TTY console

CONTRIBUTIONS

All contributions to the project will be listed in the AUTHORS document.

CONTACT

Davide Galassi <[email protected]>

LICENSING

BeeOS is free software. See the file COPYING for licensing conditions.

CONTENTS

ChangeLog
  Version history

COPYING
  Copying, distribution and modification conditions and terms.

kernel/
  BeeOS kernel sources.

libc/
  BeeOS standard C library.

libu/
  Common user level functionalities.

user/
  Various user applications and test programs.