ubifs_prepare_auth_node(9)

📦 version 7.3.1, in nixpkgs unstable

💅 ubifs_prepare_auth_node(9) — like, the Kernel API Manual era 🎀

okay so bestie, welcome to ubifs_prepare_auth_node(9) ✨ this is a little function page from the Kernel API Manual, and honestly? it's short, it's sweet, and it's lowkey doing cryptography for you. let's get into it 🫶

🌸 SYNOPSIS 🌸

int ubifs_prepare_auth_node (struct ubifs_info *c , void *node , struct
shash_desc *inhash );

literally the whole signature, character for character, no notes 💅

🦋 ARGUMENTS 🦋

  • c — your UBIFS file-system description object. it's giving "main character struct", everything flows through it 💖
  • node — the node we're calculating a hash for. yes, that node 🎀
  • inhash — the input hash of previous nodes. it's the ✨lore✨ carried over from before 😭

🔥 DESCRIPTION 🔥

so what does this actually do? <pink>it prepares an authentication node for writing onto flash.</pink> 🧚 that's the whole vibe.

it creates a HMAC from the given input hash and writes it to the node. no cap, that's it — HMAC in, node out, iconic behaviour 🌈

returns 0 for success or a negative error code otherwise. so like, if you see 0 you're slaying 👑, and if you see a negative number... that's the error code telling you it did not eat 💀

ngl bestie, keep an eye on the return value. a negative error code is not a vibe check you want to fail 🙈

⭐ SEE ALSO ⭐

the whole friend group, fr fr 💜 — all of these live in the kernel file ./fs/ubifs/auth.c:

and that's the page!! 🍓 this little gem comes to you from ./fs/ubifs, dated October 2026 — mwah, sending you the biggest kiss, go hash something pretty 💋✨

📦 where this page comes from