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•11mo ago

Comments

DonHopkins•11mo 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•11mo ago
Awesome! That actually inspired me to code this: https://codeberg.org/mco-system/pooper
don-code•11mo ago
I challenge anyone to find another place on the Internet where one person's joke is another person's kernel module.
tanelpoder•11mo ago
Astute observation, but also CrowdStrike would like a word :-)
xerxes901•11mo 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•11mo 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•11mo ago
Thanks for clarifying, and implementing this essential feature!
DonHopkins•11mo 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•11mo ago
Easy to get an infinite stream of bell codes with: yes ^V^G
bitbang•11mo ago
Very nice, needs option for json/jsonl output.
tanelpoder•11mo 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•11mo ago
can we package this for Arch? Arch Defense Taskforce where you at?
tanelpoder•11mo 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•11mo 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•11mo 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•11mo 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•11mo 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•11mo 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•11mo 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•11mo ago
Rewrote most of the functionality in C as an exercise

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

The Cult of Meetings

https://yanmaani.net/on-the-cult-of-meetings/
1•yanmaani•1m ago•0 comments

What Claude Code Chooses

https://amplifying.ai/research/claude-code-picks/report
1•ville•7m ago•0 comments

Hand Paintings and Engravings in Rock Art

https://www.bradshawfoundation.com/hands/hand_paintings_world_rock_art/index.php
1•jruohonen•8m ago•0 comments

NSA using Anthropic's Mythos despite blacklist

https://www.axios.com/2026/04/19/nsa-anthropic-mythos-pentagon
2•jbegley•10m ago•0 comments

Show HN: NYC Guessr – GeoGuessr for NYC but with live video cam footage

https://nycguessr.vercel.app/
1•aldrinjenson•10m ago•0 comments

Blue Origin's rocket reuse achievement marred by upper stage failure

https://arstechnica.com/space/2026/04/errant-upper-stage-spoils-blue-origins-success-in-reusing-n...
1•rbanffy•11m ago•0 comments

Drawmode: MCP server for Excalidraw architecture diagrams with auto-layout

https://github.com/teamchong/drawmode
1•rahimnathwani•11m ago•0 comments

Should Your Patient Be on Statins? Maybe the Eyes Can Tell

https://www.medscape.com/viewarticle/should-your-patient-be-statins-maybe-eyes-can-tell-2026a1000avs
3•brandonb•11m ago•0 comments

Good APIs Age Slowly – Yusuf Aytas

https://yusufaytas.com/good-apis-age-slowly
12•kiyanwang•11m ago•0 comments

I saw MOVA's new 3D printer handle 36 colors without the waste

https://www.xda-developers.com/movas-3d-printer-handle-36-colors-without-waste-changes-everything/
1•rbanffy•13m ago•0 comments

Documentation Is a Leaking Pipe

https://medium.com/zenzic-engineering/your-documentation-is-a-leaking-pipe-7c1d6f4a84d0
2•PythonWoods•14m ago•1 comments

Hitachi Ltd, Part I – By Bradford Morgan White

https://www.abortretry.fail/p/hitachi-ltd-part-i
1•rbanffy•16m ago•0 comments

How Wales' most obese area is declaring war on junk food

https://www.bbc.co.uk/news/articles/c36r43zjzppo
1•mmarian•16m ago•0 comments

MAGA Is Winning Its War Against U.S. Science

https://paulkrugman.substack.com/p/maga-is-winning-its-war-against-us
21•devonnull•16m ago•0 comments

Open Standard for socketable CXL-based DDR

https://github.com/Luiguard/XMM-Standard
2•Luiguard•17m ago•1 comments

How Aesop and Jean de la Fontaine help us learn new languages

https://antipodeanodyssey.wordpress.com/
1•jruohonen•19m ago•0 comments

Light Phone III

https://www.thelightphone.com/lightiii
5•sssilver•19m ago•1 comments

The Economist who was terrified of AI just found a rare reason for hope

https://fortune.com/2026/04/19/alex-imas-human-jobs-ai-economy-chicago-economist-substack-doomsda...
1•Brajeshwar•22m ago•0 comments

Ancient-DNA Study Reveals Natural Selection Has Accelerated in Evolution

https://hms.harvard.edu/news/massive-ancient-dna-study-reveals-natural-selection-has-accelerated-...
3•consumer451•22m ago•0 comments

Show HN: EIDWTimes – Predicting airport wait times with ML for a school project

https://eidwtimes.xyz/
3•odig•22m ago•0 comments

Web Design Awards have been announced

2•Pyades•24m ago•0 comments

Show HN: YouDeserveNow, Justifications for Treating Yourself

https://www.youdeservenow.com
1•oneprofiledev•26m ago•0 comments

The LLM costs are not going up

https://simianwords.bearblog.dev/conclusive-proofs-that-llm-costs-are-going-down/
2•simianwords•26m ago•0 comments

The coming global food crisis

https://www.ft.com/content/36343e24-b06f-434d-a7e5-6046e7bcf3df
1•Anon84•26m ago•1 comments

Why was a plane too heavy for take-off at Southend Airport?

https://www.bbc.co.uk/news/articles/cn8dp480p0no
1•edward•28m ago•0 comments

I wrote a CHIP-8 emulator in my own programming language

https://github.com/navid-m/chip8emu
5•pizza_man•31m ago•0 comments

Show HN: LiteMarkup: Markdown parser with TypeScript AST, <3KB, no deps

https://github.com/tuures/LiteMarkup
2•ttts•31m ago•0 comments

10 years ago, someone wrote a test for servo that included an expiry in 2026

https://mastodon.social/@jdm_/116429380667467307
1•luu•32m ago•0 comments

Scientific datasets are riddled with copy-paste errors

https://www.sciencedetective.org/scientific-datasets-are-riddled-with-copy-paste-errors/
4•jruohonen•33m ago•0 comments

GEPA prompt optimization: Claude Code Haiku +20% solve rate on new bugs

https://tim.waldin.net/blog%20latest
2•twaldin•34m ago•0 comments