entry_invocation_flags(9)

💅 entry_invocation_flags(9) — the girlies' guide to the Kernel API Manual ✨

okay so bestie, this is a page from the Kernel API Manual, section 9, and it's all about entry_invocation_flags — the invocation flags that are in effect for this exec. no cap, that's the whole NAME section, we're moving. 🎀

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✨ SYNOPSIS ✨

unsigned long entry_invocation_flags (const struct binfmt_misc_entry *e
, struct linux_binprm *bprm );

like, it takes two things and gives you back an unsigned long. that's it. that's the vibe. 🦋

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🌸 ARGUMENTS 🌸

• e — the matched binary type handler, aka the one who got picked for this exec. main character energy fr. 👑
• bprm — the binary that is being executed. the actual thing going vroom. 🔥

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💖 DESCRIPTION 💖

so here's the tea ☕: a static entry locks in its flags at registration time. done. frozen. it said "this is who i am" and never looked back. periodt.

but a 'B' entry? different story entirely. its load program gets to pick the flags per exec using bpf_binprm_set_flags. so it's out here choosing fresh every single time. iconic, honestly. ✨

and what this function does is translate that latter situation into the former — implications included, no skipping the fine print — so that the dispatch has one single set of flags to act on. one set. one vibe. one truth. 🌈

lowkey it's just making sure everybody's on the same page before the dispatch does its thing. 🫶

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⭐ RETURN ⭐

the invocation flags for this exec. 💅 that's it, that's the return value, go off.

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🎀 SEE ALSO 🎀

the whole friend group, gathered for you 🫶 — starting with the Kernel file ./fs/binfmt_misc.c, then:

• 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_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)

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ngl bestie, if you're reading this page you're already deep in ./fs territory. iykyk. 🙈

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and that's the whole page! 🍓 big kisses from ./fs, dated October 2026 — that's where this little beauty lives and when it was stamped. go forth and read your flags, you absolute icon 💜🧚‍♀️