io_setup(3)

💖 io_setup(3) — the girlies' guide 💖

okay bestie, welcome to the io_setup(3) page, straight outta the Library Functions Manual ✨ this one's a libaio girlie through and through and she is lowkey the moment you meet before you get to do anything fun 🔥

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🌸 NAME 🌸

io_setup — create an asynchronous I/O context ✨

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🎀 LIBRARY 🎀

Asynchronous I/O library (libaio, -laio) — so when you compile, you're gonna want the -laio flag, no cap 💅

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🦋 SYNOPSIS 🦋

#include <libaio.h>

long io_setup(unsigned int n, io_context_t *ctx_idp);

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✨ DESCRIPTION ✨

okay so here's the tea ☕ — io_setup() creates an asynchronous I/O context that's suitable for concurrently processing n operations. that's it. that's the whole vibe. it's giving "set up the stage so the async drama can begin" 👑

the context gets handed back to you through ctx_idp, and that's the little handle you're gonna pass around everywhere after this. main character energy fr fr 🫶

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💜 RETURN VALUE 💜

On success, io_setup() returns 0. 🎉 slay.

On error, a negative error code gets returned to indicate the error 😭 (yes, negative — not errno, bestie, read it carefully, iykyk).

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💀 ERRORS 💀

See io_setup(2). that's where the actual ✨error lore✨ lives, go look it up 💅

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🌈 STANDARDS 🌈

libaio. 💖

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🧚 HISTORY 🧚

libaio. 🎀 that's literally the whole history entry, she's mysterious like that 🙈

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⭐ SEE ALSO ⭐

• io_setup(2)
• io(3)
• aio(7)

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🌸 pspsps reminder: io_setup(3) is the library wrapper. the syscall lore is over in io_setup(2). don't mix them up, bestie, it's giving embarrassing 💅

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okay and for the sign-off 🎀 this page is part of Linux man-pages 6.20, dated 2026-04-11 — so when you see that footer at the bottom, that's just her legal name and birthday, periodt 💖