ecryptfs_de...rom_filename(9)

📦 version 7.3.1, in nixpkgs unstable

💅 ecryptfs_decode_from_filename(9) — Kernel API Manual ✨

Okay bestie, so picture this: you're deep in the kernel, you got a filename that's been encoded, and you need to decode those octets back into something real. That's literally this function. It's the ecryptfs_decode_from_filename girlie, and she's living her best life in the eCryptfs crypto corner of the kernel. 🎀

She's from the Kernel API Manual, and honestly? Iconic. 💖

🌸 NAME 🌸

ecryptfs_decode_from_filename — no cap, that's the whole name. The original doesn't give her a one-line tagline, she just is. Main character energy, honestly. 👑

🦋 SYNOPSIS 🦋

void ecryptfs_decode_from_filename (unsigned char *dst , size_t
*dst_size , const unsigned char *src , size_t src_size );

That's the whole signature, verbatim, slay. Note she returns void — she's not here to give you feedback, she's here to do the thing. 💀

✨ ARGUMENTS ✨

  • dst — okay so this is the destination, and she's got a mood. If you pass NULL, the function is like "k, I'm just gonna set dst_size and dip" — that's it, it only sets dst_size and returns. But if it's non-NULL? Then she actually decodes the encoded octets in src into the memory that dst points to. So dst is like, the vibe check: NULL means "just tell me the size," non-NULL means "we're doing this for real." 🫶
  • dst_size — this gets set to the size of the decoded string. She's telling you how big the decoded result is, bestie. Lowkey the whole point of the NULL branch. ✨
  • src — the encoded set of octets to decode. This is the input, the raw material, the encoded girliepop going in. 🌈
  • src_size — the size of the encoded set of octets to decode. You gotta tell her how many octets you're handing over, fr fr. 📏

💜 SEE ALSO 💜

So there's a whole kernel file involved — it lives at ./fs/ecryptfs/crypto.c — and then a massive friend group of functions, all (9) section because they're kernel API besties. Here's the full squad, no one gets left out:

Like, that's the whole group chat. Go read them too, iykyk. 📚💅

Side note bestie: ecryptfs_encode_for_filename(9) is literally her mirror twin — the encode girlie to this decode girlie — and ecryptfs_decode_and_decrypt_filename(9) is the next-level combo move. Obsessed. 🧚

Later bestie! This page comes straight out of ./fs/ecryptfs and it's dated October 2026 — so yeah, she's from the future, and she ate. 💅✨🦋 No cap, periodt. 🎀

📦 where this page comes from