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ChangeLog
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ChangeLog
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# BeeOS Change Log
All notable changes to this project will be documented in this file.
This project adheres to "Semantic Versioning" (http://semver.org)
################################################################################
[ Version 0.2.0 - 2018-04-06 ]
Features
- VFS mount syscall implementation
- VFS trafersing is now performed via (cached) dentries.
- DEVFS implementation
- Pseudo random number generator device driver
Improvements
- General code cleanup as the result of coding standards analysis
- MISRA C 2012
- MISRA C 2004
- SEI CERT C
Full report publication: https://datawok.net/articles/2018/beeos_static
The analysis produced a lot of code refactory. Only mahor changes are
listed here.
- Better context switch code using the stack.
- Dead code removal
Bugfix
- TTY driver fix in the get current process group controlling terminal
- Set kernel process0 task parent of itself
- VFS iget/iput fix
################################################################################
[ Version 0.1.1 - 2018-01-23 ]
Features
- VFS: devfs, allow to open initrd from user space
- mknod syscall
- gethostname library function (reads from "/etc/hostname")
- First sys_mount implementation. Not exposed to the userspace yet.
Improvements
- Infamous 'dev_io' function has been removed.
- Drivers calls directly reads and writes, eventually passing the dev_t value.
Bugfix
- Critical fix in the sys_execve. Init process was started with a null
'environ' causing issues in case it decides to use getenv/setenv/putenv calls.
User
- Better shell that prints user and host using environment variables
- 'env' program to display the environment variables.
- 'init' creates devices in 'dev' filesystem mounted in '/dev' directory using
the mknod syscall: zero,tty1,tty2,tty3,tty4,initrd.
################################################################################
[ Version 0.1.0 - 2018-01-12 ]
Features
- Multi-tty terminal (Alt-Fn to switch).
- Screen timed refresh and only on dirty backbuffers.
Bugfix
- Remove task from conditional variables wait queue before send signals.
- Wake up readers (writers) waiting on a pipe without writers (readers) to
avoid starvation.
################################################################################
[ Version 0.0.2 - 2018-01-05 ]
Features
- Independent kernel stacks virtual addresses
- Better getcwd syscall
- tcgetpgrp and tcsetpgrp syscalls
- getpgid and setpgid syscalls
- CTRL-C to send SIGINT to foreground process group
- Process vertical (parent/child) and horizontal (sibling) relationships
- Eclipse IDE projects
User
- Ignore SIGINT in the shell prompt
Fix
- Swapper task switch only if not alredy running
################################################################################
[ Version 0.0.1 - 2017-09-14 ]
First (and last?) almost stable release.
Features
- Multitasking
- Syscalls
- Virtual Memory
- Virtual File System (ext2 and custom initrd)
- SLAB memory allocator
- Buddy memory allocator
- Timer queues
- Signals
- Pipes
- System V messages
- Spinlocks
- Wait queues
- TTY
- Ramdisk
- Keyboard