Lmst

As a side project, I am working on a deep redesign of the C standard library and am contemplating blogging about it to give myself some motivation, as well as hopefully getting helpful feedback from interested enthusiasts or experienced programmers. Feel free to share this thread and ask questions, I'll be happy to answer them in my next blog post if this gets enough traction (I will post the link here on mastodon).

#programming #c #libc #c23 #c2y #clang #gcc #unix #windows #macos #plan9 #blog

Hey #Linux #Developer,
is there some #libc API that I can query on a file descriptor to get the sector size of a filesystem?

#Cpp #CSharp

🎩 Oh joy, another riveting tale about "practical modular inversion" that nobody asked for! 🤓 Lemire's mind-boggling #algorithms are back, now with #binary #flair, to solve problems no one knew existed. Meanwhile, #libc yawns while waiting for someone to care. 🚀
https://purplesyringa.moe/blog/faster-practical-modular-inversion/ #practicalmodularinversion #techhumor #HackerNews #ngated

I generated a testset of roughly 2 million patterns and respective matches to test the glob matcher of #sydbox. The glob matching code was inherited from #rsync and was first written in 1986(!). In the process I have noticed 5 divergences between the fnmatch(3) implementations of glibc vs. musl and reported it to musl devs. Here are the divergences: https://dpaste.com/44XJS89XM.txt curious to hear inputs from #regex wizards as to whether #glibc or #musl is correct! TYVMIA! #linux #libc

Unloading LD_PRELOADed libraries.

#C #ASM #LowLevel #DynamicLinker #libC #ld_preload #programming #programacion #hacking

https://ibolcode.net/dmo-blog/2025-11-how-to-unload-a-ld-preload-library-the-hard-way

🎉 systemd Lands Experimental Support For musl libc - Phoronix

｢ Systemd today finally merged support for building against and using the musl libc library. This is a win for Linux distributions like postmarketOS, Alpine Linux, and others that use musl by default as their standard C library or offer it as an option. ｣

https://www.phoronix.com/news/systemd-musl-libc

#systemd #musl #libc #postmarketOS #opensource

Коробка багов (взрывается): кроссплатформенное коварство

В сентябре мы рассматривали релиз 86Box v5.0, приуроченный к тридцати годам со дня выхода в розничную продажу Windows 95, и пообещали показать ещё кое-что. О чём мы сознательно умолчали, и почему оставили находку для отдельной статьи? Что осталось в "коробке"?

https://habr.com/ru/companies/pvs-studio/articles/963286/

#pvsstudio #86box #libc #glibc #freebsd #c11 #эмуляция #совершенный_код #стандарты_кодирования

This is freaking GENIOUS! I'd say the holy grail of both #static and #dynamic #linking, providing the benefits of both. Can't wait to test it in some real projects.

#detour #libc #dlopen #elf #executable

https://github.com/graphitemaster/detour

Oh, look! Another "groundbreaking" static version of adb for the elite #Linux crowd 😏. Because who wouldn’t want to clog their #GitHub feed with a static build powered by #musl libc? 🚀 Meanwhile, the GitHub #AI is desperately trying to make it all sound useful. 😂
https://github.com/kiddlu/adb-static #staticadb #libc #developerhumor #HackerNews #ngated

Thomas WEISSSCHUH presented at kernel recipe 2025 #nolibc a minimalist #libc included in kernel. Headers files are in the kernel source tree and it grown a lot since linux-5.1 initial version, but not installed in system (at least on Arch Linux).

Presentation at Kernel Recipes 2025 in Paris: https://kernel-recipes.org/en/2025/schedule/nolibc-a-userspace-libc-in-the-kernel-tree/
There is an [article about it on LWN][https://lwn.net/Articles/920158/)

Example given during the conference:
__
hello.c:

#include <stdio.h>

int main(void)
{
  printf("Hello World!\n");

  return 0;
}

To compile it (you can notice relative path for includes here, I stll have to add `-I/usr/include as last -I` (include path) to have it working (from root of Linux source tree):

cc -nostdinc -nostdlib -static -Iusr/include -Itools/include/nolibc/ -I/usr/include hello.c -o hello

./hello 
Hello World!

🎉 Hold the front page! 📰 Two years of #suspense for a terminal emulator just ended...🙄 drumroll please... with a #roadmap update! 🤦‍♂️ But wait, it's #zero-dependency... because, who needs #libc these days, right? 🚀
https://mitchellh.com/writing/libghostty-is-coming #terminalemulator #update #technews #HackerNews #ngated

So … are any #FreeBSD developers up to reinstating John Baldwin's change from 2008 and bringing FreeBSD back to parity with #OpenBSD?

https://cgit.freebsd.org/src/commit/include/stdio.h?id=c17bf9a9a5a3b59e03108b785f6b15070ff25651

https://news.ycombinator.com/item?id=44628639

#stdio #StandardC #OpaqueTypes #libc

Belle météo pour décoller de aéroport de Crotone (Italie) “LIBC 150750Z 05007KT 360V090 CAVOK 31/16 Q1014” : Ce que ça signifie sur https://www.bigorre.org/aero/meteo/libc/fr #crotone #italie #aeroportdecrotone #libc #crv #metar #aviation #meteoaero #avgeek #aeroport vl

Uff!

"jemalloc Postmortem", Jason Evans (https://jasone.github.io/2025/06/12/jemalloc-postmortem/).

Via HN: https://news.ycombinator.com/item?id=44264958

On Lobsters: https://lobste.rs/s/thpska/jemalloc_postmortem

#Malloc #Libc #jemalloc #MemoryManagement #Retrospective #OpenSource #FOSS #Facebook #Meta #FreeBSD #Linux #Windows #Allocators

folks who do smart things with multiprocessing models like Go and Chromium usually don't want C libraries potentially stepping on their toes. Oh gosh threads. The day I figure out how to do those, will be day the whole world will want to use this thing. But I want people who use Cosmopolitan #Libc to know what value it's providing them. I think the best way to do that is by raising awareness of the systems engineering fundamentals like this. Because that's something you're right to point out that the #Linux community leadership has room for improvement on.
https://news.ycombinator.com/item?id=26290723

@MichaelRoss something I have been trying to look for is a #Linux #ls that isn't depending on #glibc or another #libc implementation, the reason is there was some malware that attached itself to glibc and prevented you to see the directories and files it used and also the process directory in /proc
Had you a ls that wasn't built with glibc, then all the files and directories would be listed.

#BSI WID-SEC-2025-1089: [NEU] [hoch] #GNU #libc: Schwachstelle ermöglicht Codeausführung

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in GNU libc ausnutzen, um beliebigen Programmcode auszuführen.

https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2025-1089

Comparison of C/POSIX standard library implementations for Linux

https://www.etalabs.net/compare_libcs.html

#HackerNews #C #POSIX #Linux #Comparison #Libc #Implementations #Programming

(bits) of a Libc, Optimized for Wasm

https://github.com/ncruces/go-sqlite3/tree/main/sqlite3/libc

#HackerNews #Libc #Wasm #Optimization #WebAssembly #GoSQLite3

[Перевод] Ужасное состояние двоичной совместимости Linux (и что с ним делать)

Двоичная совместимость в Linux омрачена одним аспектом, который часто упускаю из виду при рассмотрении выпуска ПО для Linux. В этой статье я расскажу, как можно увидеть этот аспект, как решать эту проблему при выпуске современного ПО и что же именно нужно сделать, чтобы устранить её полностью.

https://habr.com/ru/articles/893720/

#двоичная_совместимость #дистрибутивы_linux #linux #libc #стандартная_библиотека

#LibC

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