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A simple "Unix-like" kernel trying to be POSIX compliant

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BeeOS

A simple and minimal "Unix-like" kernel trying to be POSIX compliant.

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 OS projects.

Building

Prerequisites

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

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, devfs
  • SLAB allocator
  • Buddy allocator
  • Timer queues

IPC

  • Signals
  • Pipes

Synchronization

  • Spinlocks
  • Wait queues

Drivers

  • TTY
  • Screen
  • Ramdisk
  • Keyboard
  • PRNG

Other

  • Multi TTY console

Contributions

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

Licensing

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

Content

  • ChangeLog: Version history
  • COPYING: Distribution and modification conditions and terms.
  • kernel/: BeeOS kernel sources.
  • libc/: BeeOS standard C library.
  • libu/: Common userland functions.
  • user/: Various user applications and test programs.