.. BSD from scratch - from source to OS with ease on NetBSD slides file, created by
   hieroglyph-quickstart on Fri Feb  2 05:55:13 2018.


========================================================
BSD from scratch - from source to OS with ease on NetBSD
========================================================
Sevan Janiyan - sevan @ {pkgsrc,NetBSD,FreeBSD}.org

https://www.geeklan.co.uk/files/fosdem2018-bsd

Intro / History
===============

- http://oshug.org/event/46
- http://oshug.org/event/57
- http://oshug.org/event/58

.. image:: /_static/oshug.png
   :align: center

Chiphack 2013
=============

- http://chiphack.org/
- No shout out to Altera

.. image:: /_static/chiphack.png
   :align: center

myStorm
=======

- Shout out to myStorm https://mystorm.uk
- http://www.clifford.at/icestorm/

.. image:: /_static/mystorm.jpg
   :align: center

Situation doesn't get better
============================

.. image:: /_static/xilinx.png
   :align: center

Why
===

.. rst-class:: build

- To raise expectations
- To demontstrate respect by saving time

Steep learning curve
====================

.. image:: /_static/fullstack.png
   :align: center

https://twitter.com/kevinbowling1/status/889003434967355393

Resources are available
=======================

- Stevens series (APUE, TCP/IP Illustrated...)
- K&R - The C Programming Language 
- Design and Implementation of BSD / FreeBSD
- CS631 - Advanced Programming in the UNIX Environment
- Teaching Operating Systems with Tracing - teachbsd.org

Brittle tools
=============

.. rst-class:: build

- Brendan Gregg - Shouting in the Datacentre
- Bret Victor - Inventing on Principle.
- Bryan Cantrill - Visualizing DTrace: Sun Storage 7000 Analytics, LISA '09

:)
==

.. figure:: /_static/nested.png
   :class: centre

   https://twitter.com/colinstrickland/status/866697367009071104

Poor tools harbor bad habbits
=============================

- Fear of restarting?
- Fear of change / feature creep
- Fear to explore ideas
- No room to manoeuvre (redundancy a licensed feature?)

Manifest drastic measures
=========================

.. rst-class:: build

- serverless
- eunuch kernel
- no-ops
- antikernel
- Popping Kernels, Choosing between programming in the kernel or in user space
  https://queue.acm.org/detail.cfm?id=3180444
- A Generation Lost in the Bazaar
  https://queue.acm.org/detail.cfm?id=2349257

What
====
.. rst-class:: build

- Constraint is how do you make someone's life easier who is not interested in software
- Ignore the software internal features and present ideas which benefit a user without detailed context

How
===

.. rst-class:: build

- Explore documentation
- Explore source repo
- Cross compilation with ease
- Highlevel language interface to system, in this case Lua
- Rapid prototyping on desktop with rump
- Working locally using simulation
- Tamper resistance

Clumsiness
==========

.. rst-class:: build

- Ditch serial access
  On Linux, install UUCP package for cu(1)

  chown uucp:uucp /dev/ttyUSB0

- Can be worse on OS X (install unsigned kexts)

- Building GCC with Clang
  HOST_CXXFLAGS="-fbracket-depth=512 -O2"

- Switch to network access with mDNS discovery

Bugs
====

.. rst-class:: build

- Autoconf hell
- Unbootable images
- Driver bug fixes
- Variations in kernel configuration
- Broken u-boot scripts

New changes since started
==========================

.. rst-class:: build

- Lua subsystem improvements - Marc Balmer (mbalmer)
- u-boot packages in pkgsrc/sysutils/u-boot-* - Jared McNeill (jmcneill)
- Veriexec improvements

Todo
====

.. rst-class:: build

- Improve documentation
- Extend lua & rump examples
- Implement a mechanism to add a user for network access
- luaunix - A Lua binding for various Unix functions and system calls
  https://github.com/arcapos/luaunix
- Add a testing exercise? (ATF / Anita)

Thanks to
=========

- Andrew Back (@9600)
- Open Source Hardware User Group (OSHUG)
- BCS Open Soure Special Interest Group (BCS OSSG)
- London Hack Space

NetBSD developers:

- Marc Balmer (mbalmer)
- Paul Goyette (pgoyette)
- Nick Hudson (skrll)
- Jared McNeill (jmcneill)

Questions
=========

"Do Microsoft users get to go where they want today?" - Bruce Sterling