x_to_label(9)

📦 version 7.3.1, in nixpkgs unstable

💅 x_to_label(9) — like, the Kernel API Manual, bestie ✨

okay so real talk, we're in the <pink>Kernel API Manual</pink> today and the page is literally called x_to_label(9). no cap, that's the whole vibe. it's giving kernel-internals-girlie and honestly? iconic. 🎀

🌸 NAME 🌸

x_to_label — get target label for a given xindex

like, you hand it an xindex and it hands you back the target label. that's the whole job. slay. 💅

✨ SYNOPSIS ✨

struct aa_label * x_to_label (struct aa_profile *profile , const struct
path *path , const char *name , u32 xindex , const char **lookupname ,
const char **info );

literally copy it exactly like that, don't @ me, the spacing is part of the aesthetic (it's not, but also don't touch it 🙈).

🦋 ARGUMENTS 🦋

so here's who's invited to the function call:

  • profile — the current profile, and bestie it is NOT NULL. it's the main character, it HAS to be there. 👑
  • path — the path of the file in question. literally just which file we're talking about. 🍓
  • name — the name to look up, and yes, also NOT NULL. no nulls allowed at this party. 🚫
  • xindex — the index into the x transition table. it's a u32, it's the lookup key, it's the moment. ⭐
  • lookupname — this one returns stuff: the name used in the lookup, but only if one was specified. also NOT NULL. 🫶
  • info — returns the info message if there was an error. and yup — NOT NULL too. 😭
ngl, three whole NOT NULLs in one signature. the function is highkey strict and honestly? respect. 💀

💖 DESCRIPTION 💖

find label for a transition index.

that's it. that's the description. short, sweet, ate, left no crumbs. 🔥

🌈 RETURN 🌈

returns a refcounted label, or NULL if it's not found / not available.

so like — if you get a label back, mind your refcounts, bestie, that's your responsibility now. if you get NULL, it just wasn't there. no drama. 🧚

🎀 SEE ALSO 🎀

the whole friend group, fr fr — and allegedly they all live in the kernel file ./security/apparmor/domain.c:

iykyk. go read them too, they're all on the same wavelength. 💜

and that's the page!! this one's straight out of ./security/apparmor, dated October 2026, and it belongs to x_to_label(9) — so if you see her in the wild, say hi for me 🫶✨ bye bestie!! 🌸

📦 where this page comes from