vec_cmp(9)

💅 vec_cmp(9) — the Kernel API Manual page you didn't know you needed

okay so bestie, welcome to vec_cmp(9), straight out of the Kernel API Manual. this one is lowkey tiny but it's doing real work: it's the label comparison for set ordering. iykyk 🎀

---

✨ NAME ✨

vec_cmp — literally just label comparison for set ordering, no cap 🫶

---

🌸 SYNOPSIS 🌸

int vec_cmp (struct aa_profile * const *a , int an , struct aa_profile *
const *b , int bn );

yes the line break is right there in the signature, she's just like that 💅

---

🦋 ARGUMENTS 🦋

• a — the aa_profile you're comparing (and ngl bestie, this one is NOT NULL, so do not play with me 🙈)
• an — the length of a ✨
• b — the other aa_profile you're comparing (also NOT NULL — i said what i said 😭)
• bn — the length of b 🍓

---

👑 RETURN 👑

okay so the vibe check results, in order:

• <0 — if a < b 💀
• ==0 — if a == b 🎀
• >0 — if a > b 🔥

periodt. that's the whole return contract, she's not complicated.

---

🌈 SEE ALSO 🌈

this is the part where she lists everyone she knows, and bestie she knows a LOT of people — all of these live in the kernel file ./security/apparmor/label.c, so go say hi 👋

ns_cmp(9), profile_cmp(9), aa_vec_unique(9), aa_label_alloc(9), label_cmp(9), __aa_label_next_not_in_set(9), aa_label_is_subset(9), aa_label_is_unconfined_subset(9), __label_remove(9), __label_replace(9), __label_insert(9), __vec_find(9), __label_find(9), aa_label_remove(9), aa_label_replace(9), vec_find(9), aa_label_insert(9), aa_label_next_in_merge(9), label_merge_cmp(9), label_merge_insert(9), labelset_of_merge(9), __label_find_merge(9), aa_label_find_merge(9), aa_label_merge(9), label_compound_match(9), label_components_match(9), aa_label_match(9), aa_update_label_name(9), aa_profile_snxprint(9), aa_label_snxprint(9), aa_label_asxprint(9), aa_label_acntsxprint(9), aa_label_strn_parse(9), aa_labelset_destroy(9), __label_update(9), __labelset_update(9), __aa_labelset_update_subtree(9)

like, the whole friend group fr fr 🌸

---

and that's the page, bestie!! this icon dropped from ./security/apparmor back in October 2026, so jot that down in your notes app and go compare some labels 💖✨🦋