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Manual Pages  — AIO_RETURN

NAME

aio_return – retrieve return status of asynchronous I/O operation (REALTIME)

CONTENTS

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <aio.h>

ssize_t
aio_return(struct aiocb *iocb);

DESCRIPTION

The aio_return() system call returns the final status of the asynchronous I/O request associated with the structure pointed to by iocb.

The aio_return() system call should only be called once, to obtain the final status of an asynchronous I/O operation once it has completed ((aio_error) 2 returns something other than EINPROGRESS).

RETURN VALUES

If the asynchronous I/O request has completed, the status is returned as described in read(2), readv(2), write(2), writev(2), or fsync(2). Otherwise, aio_return() returns -1 and sets errno to indicate the error condition.

ERRORS

The aio_return() system call will fail if:
[EINVAL]
  The iocb argument does not reference a completed asynchronous I/O request.
[EINVAL]
  The I/O operation was submitted with lio_listio(), and the value of the aio_lio_opcode is invalid.

SEE ALSO

aio_cancel(2), aio_error(2), aio_suspend(2), aio_waitcomplete(2), aio_write(2), fsync(2), read(2), write(2), aio(4)

STANDARDS

The aio_return() system call is expected to conform to the IEEE Std 1003.1 ("POSIX.1") standard.

HISTORY

The aio_return() system call first appeared in FreeBSD 3.0 .

AUTHORS

This manual page was written by Wes Peters <Mt wes@softweyr.com>.
AIO_RETURN (2) January 11, 2021
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