frontpage.
newsnewestaskshowjobs

Made with ♥ by @iamnishanth

Open Source @Github

fp.

Open in hackernews

New Tool: lsds – List All Linux Block Devices and Settings in One Place

https://tanelpoder.com/posts/lsds-list-linux-block-devices-and-their-config/
101•mfiguiere•9mo ago

Comments

DonHopkins•9mo ago
I always wanted the /dev/zero character device driver, which you can map into memory to clear it, or use as an infinite source of nulls, to use the minor node number as the value that got mapped into memory or produced, so you could make an infinite source of beeps with:

mknod /dev/seven c 1 7

I wonder what would happen if you made a /dev/seven device in your http servers public_html directory? Would it dutifully serve it up?

Better yet, support for utf-8 unicode, so you can make an infinite source of poo emojis.

The "Everything Is A File" philosophy should be taken to its logical conclusion.

dlt713705•9mo ago
Awesome! That actually inspired me to code this: https://codeberg.org/mco-system/pooper
don-code•9mo ago
I challenge anyone to find another place on the Internet where one person's joke is another person's kernel module.
tanelpoder•9mo ago
Astute observation, but also CrowdStrike would like a word :-)
xerxes901•9mo ago
Question: what actually reads /etc/pooper to configure the character? I can’t work out how that file’s contents ends up as module parameters and I’d love to know!
dlt713705•9mo ago
You are absolutely right, the /etc/pooper file was never loaded.

The code has been updated and now you can change the pooped char on the fly with something like :

`echo "<WHATEVER UTF-8 CHAR>" | sudo tee /sys/module/pooper/parameters/char_utf8`

/etc/pooper file and module unload/reload are no more needed :)

xerxes901•9mo ago
Thanks for clarifying, and implementing this essential feature!
DonHopkins•9mo ago
Finally somebody who gives a shit! Thank you for dropping that generous contribution.

Now I can use that device as an RSS feed! That puts the log into blog.

I haven't seen that much shit emerge from a wormhole since the Ed the Happy Clown episode of Yummy Fur comics:

https://everything2.com/node/1485685?bookmark_site=twitter&o...

>We now skip back in time a little, where we find Ronald Reagan before his mysterious transformation. He presides over an America that has no concept of toilets, and piles of feces on every street corner are becoming a serious problem. Fortunately, science can help; a farmer has stumbled across a small portal to another dimension. The solution is clear; push America's mounting shit through the portal via a huge funnel. The exit point for the portal is in fact the anus of the gentleman who couldn't stop shitting back in the prison in Ed's world; so there is at least a good scientific explanation for that little episode.

>During the official opening of the shit disposer, Reagan tragically falls into the giant collection of pending waste. His body blocks the funnel, but not before his head has gone through the portal; a headless president is recovered. A scientist heads though the portal on a rescue mission.

>(Now, I know what you're thinking, and I've no idea how Reagan's head became attached to the end of Ed's penis. It makes no sense, even within the logic of Ed's universe, and it's not explained. If you have any notions, please let me know - but for now, we'll just have to accept that somehow, it happened...)

The Chester Brown Interview:

https://www.tcj.com/the-chester-brown-interview/3/

Best NSFW Ronald Reagan Quote Ever:

https://the-comics-journal.sfo3.digitaloceanspaces.com/wp-co...

Support Indie Comics!

anonymousiam•9mo ago
Easy to get an infinite stream of bell codes with: yes ^V^G
bitbang•9mo ago
Very nice, needs option for json/jsonl output.
tanelpoder•9mo ago
Thanks! Yep I was thinking of doing that next, will be very easy as under the hood the data is stored in Python dictionaries.
appleaday1•9mo ago
can we package this for Arch? Arch Defense Taskforce where you at?
tanelpoder•9mo ago
I just added a little comment/errata regarding the NVME_QDEPTH column to the post (search for errata). I should probably rename that column to emphasize that (for now) it’s the Linux nvme module level max QD and not the hardware one (it’s complicated…)
nerflad•9mo ago
If you came to represent... https://wiki.archlinux.org/title/Creating_packages

Maintaining an AUR package can be great fun and an instructive glimpse into what FLOSS maintainers go through.

jayofdoom•9mo ago
I'll note, lsblk can return a heck of a lot more data than it does by default (and nvme drives show up there). lsblk -H will list for your system, and you can specify columns. You can also adjust output.

I guess with this in mind, I'm curious how this is different?

tanelpoder•9mo ago
Hi, yep lsblk targets a wider area of functionality, like showing mountpoints, device UUIDs, while lsds focuses only on block device settings.

Maybe the latest Linux versions have lsblk versions that support these columns, but in RHEL9 at least I don't see equivalents to lsds'es WBT_LAT, QDEPTH (not the same as lsblk's RQ-SIZE), WCACHE, FUA and some others. But these 4 are which I regularly need (especially when troubleshooting a yet another slow fsync() issue etc). I did and do use lsblk all the time too, but still end up catting and grepping various additional files and correlating the results, sometimes on systems with 100+ multipath block devices.

The other reason was that I wanted a tool that shows me where it gets these values too (for myself and sometimes for explaining stuff to others).

Edit: That being said, it shouldn't be hard at all to add the said extra fields to lsblk too.

strunz•9mo ago
Would be worth adding this as an FAQ on the page. Great job btw.

EDIT: Would also be really cool to define what each field means, if you're gonna reimplement everything anyways, why not make it as user friendly as possible.

tanelpoder•9mo ago
Thanks. Yep I have to revamp the whole 0x.tools webpage, right now it's a mix of older tools & prototypes and the "final stuff" and it's confusing what's what.

The lsds verbose option shows where in the Linux /sys fs each individual field comes from (lsds -lpv) so that's the ultimate source of what each field means. But I could pull each sysfs file's description from docs into a table on the webpage (I'm probably too lazy to create a manpage for now - help is appreciated)

Edit: Since there are not that many fields, it would be possible to add a -d option in addition to -v to get a human readable description for each field too. One of the main sources of confusion is the "queue_depth" vs. "nr_requests" fields. My ideal (which I usually don't reach) is to make these tools "explainable", so that they tell you from where they got their input data (and what basic math was applied).

jayofdoom•9mo ago
Thank you for the detailed response, even if I'm reading it late! This is exactly what I was trying to learn; what this tool exposed that lsblk is missing.
trillic•9mo ago
Rewrote most of the functionality in C as an exercise

https://gist.github.com/grahameger/2507019334f07036f84080a87...

Ghostty – Terminal Emulator

https://ghostty.org/docs
351•oli5679•6h ago•161 comments

Microgpt

http://karpathy.github.io/2026/02/12/microgpt/
1438•tambourine_man•17h ago•253 comments

Why XML Tags Are So Fundamental to Claude

https://glthr.com/XML-fundamental-to-Claude
72•glth•4h ago•34 comments

Decision trees – the unreasonable power of nested decision rules

https://mlu-explain.github.io/decision-tree/
293•mschnell•10h ago•50 comments

I built a demo of what AI chat will look like when it's "free" and ad-supported

https://99helpers.com/tools/ad-supported-chat
319•nickk81•7h ago•208 comments

Flightradar24 for Ships

https://atlas.flexport.com/
108•chromy•8h ago•25 comments

Python Type Checker Comparison: Empty Container Inference

https://pyrefly.org/blog/container-inference-comparison/
13•ocamoss•4d ago•6 comments

We do not think Anthropic should be designated as a supply chain risk

https://twitter.com/OpenAI/status/2027846016423321831
723•golfer•21h ago•392 comments

Interview with Øyvind Kolås, GIMP developer (2017)

https://www.gimp.org/news/2026/02/22/%C3%B8yvind-kol%C3%A5s-interview-ww2017/
76•ibobev•3d ago•32 comments

Lil' Fun Langs' Guts

https://taylor.town/scrapscript-001
19•surprisetalk•3h ago•2 comments

10-202: Introduction to Modern AI (CMU)

https://modernaicourse.org
169•vismit2000•11h ago•41 comments

How Dada Enables Internal References

https://smallcultfollowing.com/babysteps/blog/2026/02/27/dada-internal-references/
7•vrnvu•2d ago•0 comments

New iron nanomaterial wipes out cancer cells without harming healthy tissue

https://www.sciencedaily.com/releases/2026/02/260228093456.htm
111•gradus_ad•3h ago•33 comments

Aromatic 5-silicon rings synthesized at last

https://cen.acs.org/materials/inorganic-chemistry/Aromatic-5-silicon-rings-synthesized/104/web/20...
52•keepamovin•2d ago•24 comments

The real cost of random I/O

https://vondra.me/posts/the-real-cost-of-random-io/
67•jpineman•3d ago•8 comments

Show HN: Audio Toolkit for Agents

https://github.com/shiehn/sas-audio-processor
13•stevehiehn•3h ago•1 comments

Switch to Claude without starting over

https://claude.com/import-memory
451•doener•11h ago•216 comments

Why is the first C++ (m)allocation always 72 KB?

https://joelsiks.com/posts/cpp-emergency-pool-72kb-allocation/
99•joelsiks•9h ago•19 comments

January in Servo: preloads, better forms, details styling, and more

https://servo.org/blog/2026/02/28/january-in-servo/
14•birdculture•1h ago•1 comments

An ode to houseplant programming (2025)

https://hannahilea.com/blog/houseplant-programming/
106•evakhoury•2d ago•19 comments

Obsidian Sync now has a headless client

https://help.obsidian.md/sync/headless
545•adilmoujahid•1d ago•182 comments

When does MCP make sense vs CLI?

https://ejholmes.github.io/2026/02/28/mcp-is-dead-long-live-the-cli.html
76•ejholmes•2h ago•57 comments

Robust and efficient quantum-safe HTTPS

https://security.googleblog.com/2026/02/cultivating-robust-and-efficient.html
77•tptacek•2d ago•14 comments

Rydberg atoms detect clear signals from a handheld radio

https://phys.org/news/2026-02-rydberg-atoms-handheld-radio.html
62•Brajeshwar•2d ago•20 comments

The happiest I've ever been

https://ben-mini.com/2026/the-happiest-ive-ever-been
599•bewal416•3d ago•329 comments

Show HN: Vertex.js – A 1kloc SPA Framework

https://lukeb42.github.io/vertex-manual.html
20•LukeB42•8h ago•15 comments

Pigeons and Planes Has a Website Again

https://www.pigeonsandplanes.com/read/pigeons-and-planes-has-a-website-again
39•herbertl•3d ago•5 comments

I Built a Scheme Compiler with AI in 4 Days

https://matthewphillips.info/programming/posts/i-built-a-scheme-compiler-with-ai/
17•MatthewPhillips•2h ago•16 comments

Hardwood: A New Parser for Apache Parquet

https://www.morling.dev/blog/hardwood-new-parser-for-apache-parquet/
91•rmoff•3d ago•10 comments

H-Bomb: A Frank Lloyd Wright typographic mystery

https://www.inconspicuous.info/p/h-bomb-a-frank-lloyd-wright-typographic
129•mrngm•3d ago•35 comments