x_table_lookup(9)

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

okay so this is x_table_lookup from the Kernel API Manual, and she's a whole vibe. strap in 🎀

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🌸 NAME 🌸

x_table_lookup — lookup an x transition name via transition table

like literally, that's the whole job: you go looking for an x transition name through the transition table. no cap ✨

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🦋 SYNOPSIS 🦋

struct aa_label * x_table_lookup (struct aa_profile *profile , u32
xindex , const char **name );

that's the signature, copy it exactly, don't come for me 🫶

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💖 ARGUMENTS 💖

• profile — the current profile, and she is NOT NULL (do not test her on that, she will not be having it 💀)
• xindex — the index into the x transition table. just an index. that's it. slay 🔥
• name — this one's a returns: situation, so she hands you back the name tested to find the label. also NOT NULL. iconic behavior honestly 👑

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⭐ RETURN ⭐

you get a refcounted label back 🎀 — or NULL on failure (MAYBE NULL), so like, vibe check your result before you use it, fr fr.

the name will always be set with the last name tried — so even on the L path, you at least get receipts of what was attempted 💅✨

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🌈 SEE ALSO 🌈

bestie there's a whole extended universe here, get into it:

• the kernel file ./security/apparmor/domain.c (yes, she lives there 💜)
• may_change_ptraced_domain(9)
• label_compound_match(9)
• label_components_match(9)
• label_match(9)
• change_profile_perms(9)
• aa_xattrs_match(9)
• find_attach(9)
• x_to_label(9)
• apparmor_bprm_creds_for_exec(9)
• aa_change_hat(9)
• aa_change_profile(9)

all icons, all in the same friend group 😭🫶

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ngl if you're poking around apparmor label transitions and you landed here, you're doing amazing sweetie. go read x_to_label(9) next, iykyk 🧚

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and that's the page!! brought to you by ./security/apparmor, October 2026, filed under x_table_lookup(9) — mwah 💋🌸🍓