What is Hackers' Pub?

Hackers' Pub is a place for software engineers to share their knowledge and experience with each other. It's also an ActivityPub-enabled social network, so you can follow your favorite hackers in the fediverse and get their latest posts in your feed.

防衛省・文科省レクに行ったのですが「(子供向けの防衛白書が学校に配布され、仮想敵国として中国・ロシア・北朝鮮の地図が載ってる件について)これって外国籍の子どもになにかあったら誰が責任取るのですか?」という質問について
防衛省「自衛隊を広く知っていただくために作ったものですので(なんかあったところで責任とか知りません)」
文科省「あくまで各県の教育委員会が判断されて配布されたことですので」
私「じゃー県の教育委員会が責任を取るんですね?」
文科省「各県の教育委員会が判断されて配布されたことですので」
なんなんこれ

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We (SCI Semiconductor) are about to hire some folks in the next couple of months (probably starting in January, since we're about to hit Christmas):

We're aiming to hire 1-3 FAEs, who can build out the open-source bits of the software stack (including drivers / various communication stacks), build demos, and work with customers on use-case bringup.

We also want to hire someone else on the toolchain side. Primarily + , but also working with our (and ) folks.

Let me know if you're interested!

EDIT: We are a full-remote company. It's easiest for us to hire people in the UK (and one of our investors would really like us to hire more people in Sheffield), but elsewhere is possible (though might, for tax purposes, require you to be officially a contractor for a while).

We're also going to be hiring people for our hardware verification and RTL teams soon (more on the verification side than design at the moment, I think). I'm not responsible for them, but I can find out more details if anyone is interested. Our first CHERIoT chip is nearly finished, we're starting to work on the second.

EDIT 2: Thanks to all of the people who have expressed interest (in public and private posts). I'll try to get back to you all next week!

EDIT 3: I hope I've replied to everyone now! If I missed you (there were more replies than I expected!) please let me know. I think we'll aim to do another hiring round over the summer next year, so if the current timeline doesn't work out for you, please still let me know and I'll keep you in mind next time!

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왔도다 보았도다 흔적 남겼도다(?) 1일마다 오는 블친소~(사실 1일마다도 아님 🌙 성인 논바이너리 🌙 취업준비생으로 현재 IT 과정을 배우고 있습니다~ 그래서 학원 언급이 되게 많습니다 🌙 일상, 덕질, 헛소리가 주류를 이루며 가끔 제 개인적인 생각이 담긴 사회/정치 관련 언급을 할 때도 있습니다 🌙 모든 소수자와 사회적 약자 혐오에 반대합니다. 🌙 기력 이슈로 열정적으로 덕질하는 것은 없지만 가끔 여러가지 장르 언급을 합니다. 진짜 잡탕계입니다. 🌙 드림이나 남의 덕질 보는거 좋아합니다 제발 보여주세요 핥핥

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Day 1 of Advent of Compiler Optimisations!

Why do compilers love `xor eax, eax` for zeroing registers? It's brilliant: saves bytes compared to `mov eax, 0`, AND x86 CPUs recognise this "zeroing idiom" early in the pipeline—breaking register dependencies and removing it from execution entirely. Even better: writing to `eax` zeroes the top 32 bits of `rax` for free, handling 64-bit longs in one instruction.

Read more: xania.org/202512/01-xor-eax-eax
Watch: youtu.be/eLjZ48gqbyg

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☝️マイナ保険証は任意だよ
 取得しなくても資格確認書がもらえるから無保険にはならないよ。
 マイナ保険証を登録しちゃった人も解除すればもらえるよ。

『マイナ保険証の解除申請、累計で5万8000件に 1月は1万件超える』
毎日新聞 2月の記事
mainichi.jp/articles/20250218/

   

厚生労働省のチラシ。
マイナ保険証をお持ちでなくても
資格確認書により
これまで通り医療にかかれます。

健康保険証の有効期限が切れる前に
「資格確認書」が無償で申請によらず交付されます。

マイナ保険証の利用登録をしていても、
マイナンバーカードでの受診などが困難なかた (75歳以上の高齢者、障害者など) は申請すれば無償で交付されます。
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Prezident Petr Pavel v pondělí přijal další tři kandidáty do vlády za hnutí ANO – na ministryni financí Alenu Schillerovou, na ministra práce a sociálních věcí Aleše Juchelku na šéfa resortu průmyslu a obchodu Karla Havlíčka.
🌐 Více na webu ČT24.

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中国で売ってる3輪EVで二人乗りできるように法律改正して売ってくれれば、ダイハツは寝てていいです。トヨタだし

っていうか、ずっと言ってるけど3輪EVにドアをつければミニカー扱いで一人しか乗れないのに、ドアを取ればサイドカー扱いになって二人乗りできる時点で法律がバグってるし、日本の法律がクソすぎるんだよ!こういうところ是正しろよ!

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At this weekend I finally established another network in my home — a ZigBee network. A looong time ago (in 2010 year) I touched the ZigBee networking in my university (ITMO, previously IFMO, in Saint-Petersburg) — these times it was a new technology, not used widely. And as a student I have some fun time playing with ZigBee main router, supplemental router and end-devices. You can view old photos and screenshots of old software on a my extremely old blog: h0rr0rr-drag0n.blogspot.com/20 (and read a blogpost, if you understand Russian).

It is kindly fascinating, that now, after 15 years, I can just buy some ZigBee-powered devices from AliExpress (using Black Friday discounts) and connect them to the network inside my house right in the way I did it in the university 15 years ago!

Sadly, although I bought native supported main router device, based on the EFR32MG2 with some software from Ember (EZSP v8) inside, the OpenHAB doesn't support this device natively — it supports it, but since my server is running NetBSD, I got problems with some bundled with OpenHAB things. Looks like some native libraries (rxtx-java) don't have bundled NetBSD versions. And the same library in the repository built for Java 8, not for Java 17.

So, I decided to use Zigbee2MQTT, not to build the necessary Java library myself. It was kinda scary — use program, which connects my ZigBee network via ZigBee USB-dongle to the MQTT server — which is written on JavaScript :drgn_hide: . Not on the C (as I can totally understand, for a such low-level program, operating with embedded devices) or at least on the C++/Perl/Python/whatever. But, looks like it works good enough, if I don't try to pair the device in wrong mode (my window sensors has two modes to pair them with network: first "common" mode causes zigbee2mqtt to silently crash and the second "compatible" mode works without problems).

And I could understand now, why people has so much problems with smart home security. Installed MQTT server mosquitto — it allows unauthenticated connections by default. Installed zigbee2mqtt — it allow connections to frontend without any password by default :drgn_sigh:

At least these two services don't each much memory: 1.2 Mb for Mosquitto and 75.6 Mb for ZigBee2MQTT.

For now, my ZigBee sensors works pretty well and robust, like these devices from university 15 years ago :drgn_aww:

OpenHAB main page with some labels in it. Labels divided into two parts: "Weather" and "Home".

On the "Weather" part there are labels with the next contents:
1) Temperature (-0.1°C) with temperature graph on the background.
2) Textual description of the weather (cloudy)
3) Pressure (759,062 mmHg) with pressure graph on the background
4) Humidity (93%)
5) Wind speed (18,7 km/h)

On the "Home" part there are the next labels with data from my ZigBee sensors:
1) Temperature in the living room (23.3°C) with temperature graph on the background.
2) Temperature in the kitchen (22.4°C) with temperature graph on the background.
3) Humidity in the living room (23.0%) with humidity graph on the background.
4) Humidity in the kitchen (29.0%) with humidity graph on the background.
5) State of the window in the living room (window opened).Zigbee2MQTT dashboard with three devices in it:
1) Temperature sensor in kitchen. It exposes the temperature, humidity, signal level and battery level. Also it provides controls to set temperature units, and to calibrate readings of temperature/humidity.
2) Temperature sensor in living room. It has the same controls.
3) Sensor with magnet contact, installed on the window in the living room. It exposes, set of contact, "low battery" signal, battery level and signal level.
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Day 1 of Advent of Compiler Optimisations!

Why do compilers love `xor eax, eax` for zeroing registers? It's brilliant: saves bytes compared to `mov eax, 0`, AND x86 CPUs recognise this "zeroing idiom" early in the pipeline—breaking register dependencies and removing it from execution entirely. Even better: writing to `eax` zeroes the top 32 bits of `rax` for free, handling 64-bit longs in one instruction.

Read more: xania.org/202512/01-xor-eax-eax
Watch: youtu.be/eLjZ48gqbyg

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의료차별 맞서고, 열무김치 나누고… HIV 감염인이 감염인 돌보는 ‘서로돌봄’ 12월1일 세계 에이즈의 날 듣는 돌봄 이야기 “우리에게 돌봄은 인생의 문제 해결하고 삶을 놀이같이 만드는 실뜨기같아” 수정 2025-12-01 16:16 h21.hani.co.kr/arti/society...

의료차별 맞서고, 열무김치 나누고… HIV 감염인이 감...

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