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NetBSD: clean code, portability

K.I.A.Derouiche

March 31, 2018 Free Dejlfa

Djelfa, Algerie

About me

Architect R&D at ADGON Solutions
Student futur developer NetBSD Project
Membre de l'association A2DMETI
GitHub

Contact

A History of BSD

MULTICS
UNIX (Bell Labs)
Berkeley Tools Tapes
- ex/vi
- Pascal Compiler
A branch off the original Unix software tree
- ARPA funded development of TCP/IP at Berkeley
- Much TCP/IP research/development still around BSD’s (KAME, etc).
4.2 & 4.3 BSD used by Sun/Digital as a base for SunOS4/Ultrix, etc.
BSD is Free

Modern BSD History

Copyright problems (Tainted source code).
Branches of BSD since Net/2

Flavors and Branch Dates

NetBSD Broad platforms support (1993)
FreeBSD Rock Solid Performance (1993)
OpenBSD Security (1996)
PC-BSD Desktop (2006)
DragonFlyBSD (2003)
MiroBSD
ekkoBSD
DeforaOS
EdgeBSD
SmartOS
... more

What is NetBSD?

Complete Operating System.
Compatibility.
Many archiecture and platform support.
Tools and Source.
An Open Source Community.
Small community.
NetBSD Foundation (https://www.netbsd.org/foundation/)

Windows

Linux

OpenSuse, Debian, Fedora, Ubuntu

NetBSD

Who uses NetBSD?

NASA Lewis Research Center
Apple
Dell
SmartOS
Yahoo
Wasabi Storage
intel
Panasonic
Wasabi storage

Why?

History of innovation
High Portable
Great Tools
Security
Really Unixoid
Mature release model
Documentation
Business Friendly License

The NetBSD Philosophy

code quality/clean and correctness.
machine-dependent and machine-independent code.
Portability to a wide range of hardware.
- Supported > 57 platforms
Research and innovation.
Admin Friendly.

Résumé -;)

Produce a Whole System

Operating System
Drivers
Compilers and associated Tools
Packaging System
Ready for Coding when Install is Done
Jibbed LiveCD(old project)

Some Recent Features and Innovations

UFS2
ZFS
rumpkern
Lua(Kernel)
DTrace (import/GeSoc)
LLVM/Clang/LLDB
MAC Framework
netmap/VALE
Binary emulation

Filesystems

FFS(Default)
LFS
UFS
- Traditional Unix Filesystem
- High Performance
- Snapshots
- Journaled Soft Updates
ZFS(wip)
- Zetabyte Filesystem
- Volume Manager
- RAID
- Fully up to date in NetBSD

Security Features

NetBSD (Packet Filter)
PaX
kauth
The cryptographic device driver(CGD)
Veriexec

Tools

LLVM/Clang
Kernel Lua
sqlite
DTrace (import to FreeBSD)
more...

Software Distributions

pkgsrc Framework

Other philosphy on FreeBSD ports and Debian packages
NetBSD packaging system for 3rd party applications
Documentation and many tools pkgsrc/pkgtools
Based on makefile (BSD Make)

Supported Operating Systems

GNU/Linux
IBM AIX
Solaris,
DragonFlyBSD
OpenBSD
Haiku
... more

Package example (BSD Make)

installation, remove and update package

\$ make (fetch, configure)

\$ make install

\$ make deinstall

\$ make update (eg. replace)

pkgsrc other project

pkgin (similar apt)

Advantages/disadvantages

advantages
- easy environement, powerfull, highlly configuration
- very open project
disadvantages
- Small community
- not default desktop (pkgsrc-desktop dead)
- not user freindly

NetBSD it's not GNU/Linux

Kernel is not maintained separately.
Base OS already contains many of the required tools such as /bin/ls
BSD groups have development teams.
- Members have read-write access to entire CVS tree.
device: NetBSD by device name, Linux
Linux source code is controlled centrally.
- Utilities from diverse sources.
Coding style
- NetBSD KNF(Kernel Normal Form)
shutdown -h now for NetBSD, poweroff not functional in NetBSD
path root, /usr/pkg(NetBSD)

NetBSD vs FreeBSD

Goals and philosophy
ports
- Hardware archiecture(NetBSD)
- packages (FreeBSD)
packages systems
community number: (FreeBSD > NetBSD)
Marketing and publicity (example: https://www.netbsd.org/foundation/, https://www.freebsdfoundation.org/)

Feature NetBSD

https://wiki.netbsd.org
http://wiki.netbsd.org/projects/all/ (This page contains the list of all available projects,)
https://blog.netbsd.org/
http://www.pkgsrc.se/
@Twitter:NetBSD/foundation/pkgsrc

Questions ?