entry_open_interpreter(9)

💅 entry_open_interpreter(9)

okay so bestie, welcome to the Kernel API Manual — yes we're reading kernel docs together, this is our bonding era 🫶. This one's called entry_open_interpreter, and it does exactly what it says on the tin: it opens the entry's interpreter so it can actually be executed. iconic behaviour, no notes ✨

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🌸 SYNOPSIS 🌸

struct file * entry_open_interpreter (const struct binfmt_misc_entry *e
, struct linux_binprm *bprm , const char *interpreter );

like, that's the whole vibe. one function, three args, returns a struct file * 💖

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🎀 ARGUMENTS 🎀

• e — the matched binary type handler. the handler that matched, bestie. it's giving "we found your type" 💅
• bprm — the binary that's being executed. like, the thing currently mid-exec, main character energy fr.
• interpreter — the interpreter that got selected for this exec. the chosen one 👑

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🦋 DESCRIPTION 🦋

okay so here's the tea ☕ — the behaviour depends entirely on what kind of entry you're holding, and honestly? it slays:

• an 'F' entry hands out a clone of the file it pre-opened back at registration ✨
• a 'B' entry does the exact same thing — but only if its load program selected one of the interpreters it bound 🔥
• any other entry? it just opens the selected path. simple. periodt 💅

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⭐ RETURN ⭐

• the opened interpreter on success 🎉
• an ERR_PTR on failure 😭 (yes, the sad path. it happens to the best of us)

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🌈 SEE ALSO 🌈

the whole friend group, assembled 🫶:

• Kernel file ./fs/binfmt_misc.c
• struct binfmt_misc_flag(9)
• search_binfmt_handler(9)
• get_binfmt_handler(9)
• binfmt_misc_find_interp(9)
• entry_attach_interpreter(9)
• put_binfmt_handler(9)
• current_binfmt_misc(9)
• entry_select_interpreter(9)
• entry_invocation_flags(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)

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and that's the whole page, bestie 💜 this little gem lives in ./fs and the version/date stamp on it is October 2026 — so yeah, it's from the future, we stay ahead of the curve 😌✨ go forth and open those interpreters 🦋💖