entry_attach_interpreter(9)

💅 entry_attach_interpreter(9) — like, the Kernel API Manual edition 🎀

okay bestie, so this is a page straight out of the Kernel API Manual and it's about entry_attach_interpreter(9) — the function that literally ties an opened interpreter to your entry. no cap, it's a small one but it's iconic 🦋

---

✨ NAME ✨

entry_attach_interpreter — bind an opened interpreter to @e. that's it. that's the whole vibe 💫

---

🌸 SYNOPSIS 🌸

int entry_attach_interpreter (struct binfmt_misc_entry *e , const char
*name , const char *path , struct file *f );

look at her go 😭 four args, one int back, absolute main character energy 👑

---

🫶 ARGUMENTS 🫶

• e — the entry being configured. she's getting ✨decorated✨ rn.
• name — the name the load program will select it by. it's empty for the fixed interpreter of a static entry (iykyk 🧚)
• path — the path that f was opened from. receipts matter, bestie 🧾
• f — the interpreter itself, opened for execution 🔥

---

💜 DESCRIPTION 💜

okay so here's the tea ☕ — every exec runs a clone of f. that means path only decided which file is bound and, like, nothing else. it is not resolved again. not in any namespace. periodt 💅 don't come for her.

and the caller? the caller has chores before this works, bestie:

• they have to have validated name and path ✅
• established that e cannot be matched yet 🚫
• and they own f until this whole thing succeeds 🫴

no skipping steps, fr fr 🙈

---

⭐ RETURN ⭐

• 0 on success — slay, we ate 🎉
• -ENOSPC if the entry is full or the binder is out of UCOUNT_BINFMT_MISC_INTERPRETERS budget 😭 (budget's gone, no cap)
• a negative errno on failure 💀

---

🌈 SEE ALSO 🌈

• Kernel file ./fs/binfmt_misc.c
• struct binfmt_misc_flag(9)
• search_binfmt_handler(9)
• get_binfmt_handler(9)
• binfmt_misc_find_interp(9)
• put_binfmt_handler(9)
• current_binfmt_misc(9)
• entry_select_interpreter(9)
• entry_invocation_flags(9)
• entry_open_interpreter(9)
• build_interp_argv(9)
• i_binfmt_misc(9)
• bm_evict_inode(9)
• unlink_binfmt_handler(9)
• remove_binfmt_handler(9)
• bm_unlink(9)
• bm_entry_add_interp(9)

like, the whole friend group showed up to the group chat 💖 go read them, they're all lowkey obsessed with each other 🧚‍♀️

---

ngl, if you forget the caller-side prep (validating name and path, making sure e can't be matched yet, and owning f until success), that's on you — the function is not doing your homework for you 😤

---

✨ that's the whole page, bestie — go forth and bind responsibly ✨

from the ./fs source, dated October 2026 — mwah, catch you in the next manpage 💋🎀🌷