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.