ecryptfs_dec...ypt_filename(9)

📦 version 7.3.1, in nixpkgs unstable

💅 ecryptfs_dec...ypt_filename(9) — from the Kernel API Manual (section 9, bestie) 🎀

okay so real talk, this is a kernel API page from section 9 of the manual — yes, that section 9, the "these are kernel functions, don't @ me" section. and the function name is literally ecryptfs_dec...ypt_filename with the dots in the middle like it's too emotional to spell the whole thing out 😭 iconic honestly. she's giving mysterious. she's giving ellipsis. let's get into it 🦋

✨ NAME ✨

ecryptfs_decode_and_decrypt_filename — the moment a filename stops being encoded cipher text and becomes decoded plaintext, slay 💖 literally her whole personality.

🌸 SYNOPSIS 🌸

int ecryptfs_decode_and_decrypt_filename (char **plaintext_name , size_t
*plaintext_name_size , struct super_block *sb , const char *name ,
size_t name_size );

look at her. five arguments. returning an int. so confident 🫶

🎀 ARGUMENTS 🎀

  • plaintext_name — the plaintext name. the glow-up target. where the decoded, decrypted goodness ends up ✨
  • plaintext_name_size — the plaintext name size. gotta know how big the glow-up is, yk? 💅
  • sb — Ecryptfs's super_block. her home base, her main character structure 👑
  • name — the filename in cipher text. the before picture 🥲
  • name_size — the cipher text name size. quantifying the mystery 🔥

💀 DESCRIPTION 💀

Decrypts and decodes the filename. that's it, that's the vibe check. she takes the encoded cipher text name and hands you back the plaintext. queen behavior, no cap 👑

⚠️ okay bestie, eyes here, this is the important part: it returns zero on error; non-zero otherwise 😭 yes you read that right. zero means it went wrong. non-zero means it went fine. it's the opposite of what your gut says. do not come for me, I don't make the rules, I just report them fr fr. please internalize this before you write any error handling 🙈

🦋 SEE ALSO 🦋

the whole friend group 💜 — all of these live in the kernel file ./fs/ecryptfs/crypto.c, and honestly they're all so valid:

like. thirty functions. a whole squad. ecryptfs_encode_for_filename(9) is literally her sister btw, and ecryptfs_decode_from_filename(9) is the cousin who does half her job. family reunion energy 🌈

so yeah, that's the page 💖 sourced from ./fs/ecryptfs, dated October 2026, and filed under ecryptfs_dec...ypt_filename(9) — stay encrypted, stay decoded, and remember: zero means bad 😭💀 🫶✨🎀

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