self_check_not_bad(9)

📦 version 7.3.1, in nixpkgs unstable

✨ self_check_not_bad(9) ✨

okay bestie, welcome to self_check_not_bad(9) — a tiny little function from the Kernel API Manual and honestly it's giving "small but mighty" 🫶. Its whole personality? Making sure a physical eraseblock is not bad. That's it. That's the vibe check. 💅

🌸 SYNOPSIS 🌸

int self_check_not_bad (const struct ubi_device *ubi , int pnum );

literally the whole signature, no cap. two args, one int coming back at you. 🎀

🦋 ARGUMENTS 🦋

  • ubi — the UBI device description object, aka the whole device's little info packet. you're basically handing it the receipts for the device you're poking at 📋
  • pnum — the physical eraseblock number you wanna check. like, "hey is block number this one okay?" 🔍

💖 DESCRIPTION 💖

okay so here's the tea ☕: this function returns zero if the physical eraseblock is good — slay, everything's fine, block is iconic 👑.

But if the block is bad? You get -EINVAL. Not a vibe. 😭

And if something else went wrong — like a genuine error situation — you get a negative error code back. so basically: 0 = good, -EINVAL = bad block, other negatives = oops something happened, check the error code bestie 💀

fr fr, keep those three outcomes straight in your head: 0 good, -EINVAL bad block, any other negative error code = an actual error occurred. don't conflate them, iykyk 🤞

🌈 SEE ALSO 🌈

go read these next, bestie, they're all in the same friend group 🧚✨:

okay that's the whole page, you ate that 💜 this lil gem lives over in ./drivers/mtd/ubi and the version vibes are dated October 2026 ⭐ go forth and check those eraseblocks, main character energy only 🦋🌸💖

📦 where this page comes from