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io_setup(3) Library Functions Manual io_setup(3)

NAME

io_setup - create an asynchronous I/O context

LIBRARY

Asynchronous I/O library (libaio-laio)

SYNOPSIS

#include <libaio.h>
long io_setup(unsigned int n, io_context_t *ctx_idp);

DESCRIPTION

io_setup() creates an asynchronous I/O context suitable for concurrently processing n operations.

RETURN VALUE

On success, io_setup() returns 0. On error, a negative error code is returned to indicate the error.

ERRORS

See io_setup(2).

STANDARDS

libaio.

HISTORY

libaio.

SEE ALSO

io_setup(2), io(3), aio(7)

2026-04-11 Linux man-pages (unreleased)