RE: https://mastodon.social/@pitrh/116986659461433341

I wouldn't trust a word that guy says. Especially after lunch #eurobsdcon #NetBSD

Stefano Marinelli boosted

Peter N. M. Hansteen » 🌐 2026-07-26
@pitrh@mastodon.social

At EuroBSDcon 2026:
Linux emulation on NetBSD: How broken is it? https://events.eurobsdcon.org/2026/talk/WXCFYU/
Talk by Stephen Borrill
2026-09-12 13:00:00
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At EuroBSDcon 2026:
From Report to Patch, the OpenBSD Errata Process https://events.eurobsdcon.org/2026/talk/ZGDXQR/
Talk by Alexander Bluhm
2026-09-13 10:30:00
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About EuroBSDcon 2026: https://2026.eurobsdcon.org
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At EuroBSDcon 2026:
Input devices on OpenBSD for console, X11 and Wayland https://events.eurobsdcon.org/2026/talk/YMR3ZF/
Talk by Matthieu Herrb
2026-09-12 13:00:00
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About EuroBSDcon 2026: https://2026.eurobsdcon.org
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At EuroBSDcon 2026:
Using modern *BSD to get a 4.2BSD system from 1983 running https://events.eurobsdcon.org/2026/talk/YGCH9Y/
Talk by Walter Belgers
2026-09-13 15:15:00
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About EuroBSDcon 2026: https://2026.eurobsdcon.org
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At EuroBSDcon 2026:
Linux emulation on NetBSD: How broken is it? https://events.eurobsdcon.org/2026/talk/WXCFYU/
Talk by Stephen Borrill
2026-09-12 13:00:00
To register: https://tickets.eurobsdcon.org/eurobsdcon/brussels/
About EuroBSDcon 2026: https://2026.eurobsdcon.org
@eurobsdcon #eurobsdcon #freebsd #netbsd #openbsd #conference #brussels #bruxelles #freesoftware #libresoftware

At EuroBSDcon 2026:
Porting STUNMESH-go to FreeBSD and macOS: Building Peer-to-Peer WireGuard Networks https://events.eurobsdcon.org/2026/talk/WHGJBN/
Talk by Yu-Chiang (Date) Huang
2026-09-12 15:00:00
To register: https://tickets.eurobsdcon.org/eurobsdcon/brussels/
About EuroBSDcon 2026: https://2026.eurobsdcon.org
@eurobsdcon #eurobsdcon #freebsd #netbsd #openbsd #conference #brussels #bruxelles #freesoftware #libresoftware

At EuroBSDcon 2026:
Keeping up with language-based packaging systems in Ports (especially Python) https://events.eurobsdcon.org/2026/talk/VDQ3JL/
Talk by Charlie Li
2026-09-13 16:15:00
To register: https://tickets.eurobsdcon.org/eurobsdcon/brussels/
About EuroBSDcon 2026: https://2026.eurobsdcon.org
@eurobsdcon #eurobsdcon #freebsd #netbsd #openbsd #conference #brussels #bruxelles #freesoftware #libresoftware

At EuroBSDcon 2026:
Supporting hibernate (S4) on FreeBSD https://events.eurobsdcon.org/2026/talk/TXRZP7/
Talk by Olivier Certner
2026-09-13 11:30:00
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About EuroBSDcon 2026: https://2026.eurobsdcon.org
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At EuroBSDcon 2026:
Reducing the headache of VPNs with routing domains https://events.eurobsdcon.org/2026/talk/TUT8LU/
Talk by Martin Vahlensieck
2026-09-12 14:00:00
To register: https://tickets.eurobsdcon.org/eurobsdcon/brussels/
About EuroBSDcon 2026: https://2026.eurobsdcon.org
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At EuroBSDcon 2026:
BSD as a Foundational Platform for Nationwide Semiconductor Education in Japan https://events.eurobsdcon.org/2026/talk/TDELZJ/
Talk by Hiroki Sato
2026-09-12 16:00:00
To register: https://tickets.eurobsdcon.org/eurobsdcon/brussels/
About EuroBSDcon 2026: https://2026.eurobsdcon.org
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At EuroBSDcon 2026:
A Noob Goes OpenBSD https://events.eurobsdcon.org/2026/talk/T3MDAC/
Talk by Kent Inge Fagerland Simonsen
2026-09-12 15:00:00
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About EuroBSDcon 2026: https://2026.eurobsdcon.org
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At EuroBSDcon 2026:
FreeBSD on ARM64: A User's Perspective https://events.eurobsdcon.org/2026/talk/SKHWVL/
Talk by Michael Dexter
2026-09-12 16:00:00
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At EuroBSDcon 2026:
Managing FreeBSD jails with Sylve and Ansible https://events.eurobsdcon.org/2026/talk/S3ULVJ/
Tutorial Half Day by Patrick M. Hausen
2026-09-11 10:30:00
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About EuroBSDcon 2026: https://2026.eurobsdcon.org
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At EuroBSDcon 2026:
An Introduction to the Filesystems and Networking in the FreeBSD Open-Source Operating System https://events.eurobsdcon.org/2026/talk/RNEMNV/
Tutorial Full Day by Kirk McKusick
2026-09-10 10:30:00
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About EuroBSDcon 2026: https://2026.eurobsdcon.org
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At EuroBSDcon 2026:
Network Management with the PF Packet Filter Toolset on OpenBSD and FreeBSD https://events.eurobsdcon.org/2026/talk/RKCHRW/
Tutorial Full Day by Peter N. M. Hansteen, Massimiliano Stucchi and Tom Smyth
2026-09-11 10:30:00
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At EuroBSDcon 2026:
The night before CRAmas - why EU regulations are a gift to open source https://events.eurobsdcon.org/2026/talk/RER8UZ/
Tutorial Full Day by Alice Sowerby, Peter N. M. Hansteen and Pierre Pronchery
2026-09-10 10:30:00
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At EuroBSDcon 2026:
Hotplugging adventures in the bhyve hypervisor https://events.eurobsdcon.org/2026/talk/QVRGB9/
Talk by Bojan Novković
2026-09-13 11:30:00
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About EuroBSDcon 2026: https://2026.eurobsdcon.org
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At EuroBSDcon 2026:
rcd(8): modern service manager the FreeBSD way https://events.eurobsdcon.org/2026/talk/QTAQKG/
Talk by bapt
2026-09-12 16:00:00
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At EuroBSDcon 2026:
Incident Response done the FreeBSD way https://events.eurobsdcon.org/2026/talk/PBHXXC/
Talk by Maciej Jan Broniarz
2026-09-12 14:00:00
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At EuroBSDcon 2026:
GEFS: The File Shredder of the Future. https://events.eurobsdcon.org/2026/talk/NVMSCJ/
Talk by Ori Bernstein
2026-09-13 11:30:00
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At EuroBSDcon 2026:
Introduction to TUI Programming with bsddialog https://events.eurobsdcon.org/2026/talk/MGL8PR/
Tutorial Half Day by Benedict Reuschling
2026-09-11 14:30:00
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At EuroBSDcon 2026:
Unix Manpages, Then and Now https://events.eurobsdcon.org/2026/talk/MDEE9H/
Talk by Kristaps Dzonsons
2026-09-12 17:00:00
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At EuroBSDcon 2026:
Base system packages in Production: A Practical Overview https://events.eurobsdcon.org/2026/talk/MBEDBM/
Talk by Lukas Engelhardt
2026-09-12 15:00:00
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At EuroBSDcon 2026:
OpenNTPD - 20 years and a few milliseconds later https://events.eurobsdcon.org/2026/talk/MAHMBQ/
Talk by Henning Brauer
2026-09-13 16:15:00
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About EuroBSDcon 2026: https://2026.eurobsdcon.org
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At EuroBSDcon 2026:
nuageinit(7): make FreeBSD cloud native https://events.eurobsdcon.org/2026/talk/LZUXZ8/
Talk by bapt
2026-09-12 17:00:00
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At EuroBSDcon 2026:
How Fast Can We Patch? https://events.eurobsdcon.org/2026/talk/LSR7EX/
Talk by Dave Cottlehuber (dch)
2026-09-13 14:15:00
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At EuroBSDcon 2026:
FreeBSD Ports Any% Speedrun 180min https://events.eurobsdcon.org/2026/talk/KHHBZE/
Tutorial Half Day by Mateusz Piotrowski
2026-09-11 14:30:00
To register: https://tickets.eurobsdcon.org/eurobsdcon/brussels/
About EuroBSDcon 2026: https://2026.eurobsdcon.org
@eurobsdcon #eurobsdcon #freebsd #netbsd #openbsd #conference #brussels #bruxelles #freesoftware #libresoftware

At EuroBSDcon 2026:
The night 142 of my servers went up in the clouds. Physically. https://events.eurobsdcon.org/2026/talk/KAEQA8/
Talk by Stefano Marinelli
2026-09-12 11:15:00
To register: https://tickets.eurobsdcon.org/eurobsdcon/brussels/
About EuroBSDcon 2026: https://2026.eurobsdcon.org
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At EuroBSDcon 2026:
Looney Tunes: FreeBSD, rsync, and ZFS https://events.eurobsdcon.org/2026/talk/JURFDY/
Talk by Mateusz Piotrowski
2026-09-13 17:15:00
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About EuroBSDcon 2026: https://2026.eurobsdcon.org
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At EuroBSDcon 2026:
The current state of "Green AI" https://events.eurobsdcon.org/2026/talk/JP73CG/
Talk by Anne Currie
2026-09-13 09:30:00
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At EuroBSDcon 2026:
Introduction to the Game of Trees version control system https://events.eurobsdcon.org/2026/talk/JJLZXQ/
Tutorial Half Day by Stefan Sperling and Omar Polo
2026-09-10 10:30:00
To register: https://tickets.eurobsdcon.org/eurobsdcon/brussels/
About EuroBSDcon 2026: https://2026.eurobsdcon.org
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At EuroBSDcon 2026:
Running BSD workloads in Linux environments as OCI containers https://events.eurobsdcon.org/2026/talk/JHXWDC/
Talk by Charalampos Mainas
2026-09-12 17:00:00
To register: https://tickets.eurobsdcon.org/eurobsdcon/brussels/
About EuroBSDcon 2026: https://2026.eurobsdcon.org
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At EuroBSDcon 2026:
Confidential VMs on FreeBSD: A Complete AMD SEV Host Stack for bhyve, with Attestation https://events.eurobsdcon.org/2026/talk/HSMCFS/
Talk by Zhen-Rong Wu
2026-09-13 10:30:00
To register: https://tickets.eurobsdcon.org/eurobsdcon/brussels/
About EuroBSDcon 2026: https://2026.eurobsdcon.org
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At EuroBSDcon 2026:
The Realities of Enterprise FreeBSD https://events.eurobsdcon.org/2026/talk/HRXAHF/
Talk by Allan Jude
2026-09-12 11:15:00
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At EuroBSDcon 2026:
Advances in OpenBSD's pkg_add https://events.eurobsdcon.org/2026/talk/HFYB3N/
Talk by Marc Espie
2026-09-13 14:15:00
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At EuroBSDcon 2026:
Getting Extended Error Messages from the FreeBSD Kernel https://events.eurobsdcon.org/2026/talk/HA8JTA/
Talk by Kirk McKusick
2026-09-13 16:15:00
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At EuroBSDcon 2026:
I/O and theorems and barriers, oh my https://events.eurobsdcon.org/2026/talk/FQJSPU/
Talk by Taylor R Campbell
2026-09-12 14:00:00
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At EuroBSDcon 2026:
Low friction temporary VMs on FreeBSD https://events.eurobsdcon.org/2026/talk/FMAKRV/
Talk by Martin Vahlensieck
2026-09-13 17:15:00
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At EuroBSDcon 2026:
An Introduction to the Kernel Services and I/O System of the FreeBSD Open-Source Operating System https://events.eurobsdcon.org/2026/talk/EYQSJR/
Tutorial Full Day by Kirk McKusick
2026-09-11 10:30:00
To register: https://tickets.eurobsdcon.org/eurobsdcon/brussels/
About EuroBSDcon 2026: https://2026.eurobsdcon.org
@eurobsdcon #eurobsdcon #freebsd #netbsd #openbsd #conference #brussels #bruxelles #freesoftware #libresoftware

At EuroBSDcon 2026:
ELKE - Encrypted & Lovely Kage Environment, using FreeBSD https://events.eurobsdcon.org/2026/talk/EXHKSR/
Talk by Vinícius Z.
2026-09-13 15:15:00
To register: https://tickets.eurobsdcon.org/eurobsdcon/brussels/
About EuroBSDcon 2026: https://2026.eurobsdcon.org
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At EuroBSDcon 2026:
make buildworld && make install-future: Why FreeBSD's Adoption Story Runs Through Continuous Integration https://events.eurobsdcon.org/2026/talk/EA98CK/
Talk by Moin Rahman
2026-09-13 10:30:00
To register: https://tickets.eurobsdcon.org/eurobsdcon/brussels/
About EuroBSDcon 2026: https://2026.eurobsdcon.org
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At EuroBSDcon 2026:
Highly Available DNS via BGP
Talk by Beni Keller
2026-09-12 10:30:00
To register: https://tickets.eurobsdcon.org/eurobsdcon/brussels/
About EuroBSDcon 2026: https://2026.eurobsdcon.org
@eurobsdcon #eurobsdcon #freebsd #netbsd #openbsd #conference #brussels #bruxelles #freesoftware #libresoftware

At EuroBSDcon 2026:
PFWall: building firewall images to run at scale https://events.eurobsdcon.org/2026/talk/DZ9GE3/
Talk by Pierre Emeriaud
2026-09-13 17:15:00
To register: https://tickets.eurobsdcon.org/eurobsdcon/brussels/
About EuroBSDcon 2026: https://2026.eurobsdcon.org
@eurobsdcon #eurobsdcon #freebsd #netbsd #openbsd #conference #brussels #bruxelles #freesoftware #libresoftware

At EuroBSDcon 2026:
Run Time Reoptimization for Modern Heterogenous Systems https://events.eurobsdcon.org/2026/talk/CPAE7W/
Talk by George Neville-Neil
2026-09-12 13:00:00
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About EuroBSDcon 2026: https://2026.eurobsdcon.org
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At EuroBSDcon 2026:
FreeBSD in Bioinformatics: The Good, The Bad and The Ugly https://events.eurobsdcon.org/2026/talk/CEZMMY/
Talk by Varinka Ohanyan
2026-09-13 15:15:00
To register: https://tickets.eurobsdcon.org/eurobsdcon/brussels/
About EuroBSDcon 2026: https://2026.eurobsdcon.org
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At EuroBSDcon 2026:
Bringing memory safety to BSD with CHERI https://events.eurobsdcon.org/2026/talk/AU3F7S/
Talk by Brooks Davis
2026-09-13 14:15:00
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About EuroBSDcon 2026: https://2026.eurobsdcon.org
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At EuroBSDcon 2026:
What has (can) the EU Cyber Resilience Act done (do) for you? https://events.eurobsdcon.org/2026/talk/9NVQAD/
Talk by Peter N. M. Hansteen
2026-09-12 10:30:00
To register: https://tickets.eurobsdcon.org/eurobsdcon/brussels/
About EuroBSDcon 2026: https://2026.eurobsdcon.org
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At EuroBSDcon 2026:
Hands On experience Chaos Education: Challenge your FreeBSD sysadmin skills by solving real world scenarios https://events.eurobsdcon.org/2026/talk/7KWLK9/
Tutorial Half Day by Andreas Kirchner 2026-09-11 10:30:00
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About EuroBSDcon 2026: https://2026.eurobsdcon.org
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At EuroBSDcon 2026:
Running stock FreeBSD on Windows Subsystem for Linux 2 https://events.eurobsdcon.org/2026/talk/39G3BV/
Talk by Balaje Sankar 2026-09-12 11:15:00
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Whilst researching this, I had a look at some of the libraries out there to see how they do it on different operating systems.

Microsoft Windows and Apple MacOS X provide system APIs for doing this.
On Linux, some libraries go poking around in `/dev/serial/*`, others go nosing through `/sys/class/tty/*`. Some just look for specific names in `/dev` and hope for the best. `pyserial` also checks `/proc/tty/drivers` on Linux, but everywhere else in POSIX land it uses `glob`.

Most do not consider BSD at all. You're on your own to learn what serial ports your computer has. It's a mess.

#NetBSD has a `/kern` virtual filesystem which is similar to `/sys` in Linux… so there *is* scope there to maybe put some sort of virtual text file that dumps a mapping of devices and what device nodes they're at. My mind also thinks about OpenFirmware's DeviceTree.

BSD in general, has the same problem Linux had years ago: it assumed the hardware never changed. In the 80s and 90s, that was mostly true, your devices were hard-wired into "busses". You mostly ignored that there was a ISA bus, you just "knew" you had a device at address 0x300 and "talked" to it. It was there at power on, and there at shutdown.

SCSI was a little more complicated, you spoke to your disk drive *through* this HBA card.

Then came along Firewire, USB and Bluetooth. Devices could come and go as they pleased. Moreover, USB is a tree structure and Bluetooth is a mesh radio network. A flat structure doesn't quite describe the situation. I'm seeing a lot of wisdom behind the idea of Open Firmware's DeviceTree… and it seems to me, the kernel of a modern OS needs to track a live changing representation of this. A big part of keeping track will be providing a mechanism for the userspace to learn of changes in this tree, and to find where things are.

While I don't expect them to wholesale copy Linux, I think there is merit in the kernel calling a userspace application to "set up" devices when they are detected, and "tear down" those devices when they are removed.

This is `udev` in Linux and it is very handy even if it can be a pain in the bum to debug.

I've also seen the virtual `/dev` filesystem route used. Linux used to have `devfs`, and SyllableOS also used such a system. Not saying that's the best approach, but it is another way of exposing this information to the system.

Not sure which is the "right" approach, but I don't think a static "nothing ever changes" approach is viable here.