findstr(9)

📦 version 7.3.1, in nixpkgs unstable

💅 findstr — like, the safest little needle-hunter in the kernel 🪡✨

okay so before we even start: this page lives in the Kernel API Manual (section 9, kernel-space girlies only 💖), and honestly? she's a tiny function with main character energy. let's get into it.

✨ NAME ✨

findstr — Safely find needle in haystack. 🧵🌾

like literally that's the whole gig. needle. haystack. no cap.

🦋 SYNOPSIS 🦋

char * findstr (char *haystack , int hlen , char *needle , int nlen );

that's her. she's short. she's sweet. she takes four things and she does not elaborate 💅

🎀 ARGUMENTS 🎀

  • haystack — Buffer to look in. 🥅 this is the big pile bestie, the place you're searching.
  • hlen — Number of bytes in haystack. 📏 yes you have to tell her how big the pile is, she's not gonna guess.
  • needle — Buffer to find. 🪡 the lil thing you're hunting for.
  • nlen — Number of bytes in needle. 📐 and yes, the needle gets a size too. equal opportunity measurements.

🌈 RETURN 🌈

Pointer into haystack where the needle was found — or NULL if not found. 🫶

so like, it points into your haystack, it doesn't copy anything. if it comes back NULL she just didn't see it fr fr. no error, no drama, just NULL. 😭

💜 SEE ALSO 💜

bestie she has a whole friend group and they're all in the DVB-CA world. buckle up 👑

Kernel file: ./drivers/media/dvb-core/dvb_ca_en50221.c

and the whole squad, in order, no skips (i would never):

twenty-four icons. she knows people. iykyk 💅💖

ngl the whole "safely" in the NAME is doing a lot of heavy lifting up there — that's straight from the page bestie, i'm just the messenger 🧚

mwah 💋 that's the page! this lil beauty ships out of ./drivers/media/dvb-core and it's dated October 2026 — mark your calendars, she's a findstr(9) girlie forever 🎀⭐🦋

📦 where this page comes from