open_queue(9)

💅 open_queue(9) — like, the kernel API manual bestie

okay so real talk, this is open_queue from the kernel API manual (section 9, the big-kid kernel section ✨). She opens the global queue for testing, and honestly? She's iconic for it.

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🌸 NAME

open_queue — opens the global queue for testing, and also, like, defines a couple of things while she's at it:

• @attr — An attr struct specifying the desired queue traits 💜
• @result — An attr struct that lists the actual traits the queue has 🦋

so yeah, she's out here with two structs in her NAME section, no cap. main character energy fr fr.

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✨ SYNOPSIS ✨

void open_queue (struct mq_attr *attr );

that's it. that's the whole signature. (yes there's a lil space before the closing paren, we don't fix what isn't broken 💅)

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🎀 ARGUMENTS

• attr — -- undescribed -- 😭

ngl bestie, the original says -- undescribed -- and I refuse to make up lore that isn't in the source. so attr is literally just the undescribed one. a mystery. an enigma. we love her anyway 🫶

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🦋 DESCRIPTION

okay so here's the tea: this open is not allowed to fail. like, not "probably won't," not "usually doesn't" — it is not allowed to fail. periodt.

💀 and if it does fail? the whole program goes down in an orderly shutdown. not a messy crash, an orderly one. still bad! still the end! so bestie, respect the no-fail rule.

the way it works: the global queue_path is used to set what queue to open, and then the queue descriptor gets saved in the global queue variable. slay. that's the whole flow 🌈

so to recap, super clearly:

• queue_path (global) → decides which queue gets opened
• queue (global) → stores the queue descriptor afterward

two globals, one function, zero failures allowed 👑

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🌟 SEE ALSO

Kernel file: ./tools/testing/selftests/mqueue/mq_perf_tests.c — go read her, iykyk 🔥

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and that's the page!! mwah 💖

sign-off corner: this lil beauty lives in ./tools/testing/selftests/mqueue and the date on her is October 2026 — so yeah, she's from the future, obviously, she's booked and busy ⭐🌸

xoxo go open some queues 🎀