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-.Dd January 11, 2021
-.Dt AIO_RETURN 2
-.Os
-.Sh NAME
-.Nm aio_return
-.Nd retrieve return status of asynchronous I/O operation (REALTIME)
-.Sh LIBRARY
-.Lb libc
-.Sh SYNOPSIS
-.In aio.h
-.Ft ssize_t
-.Fn aio_return "struct aiocb *iocb"
-.Sh DESCRIPTION
-The
-.Fn aio_return
-system call returns the final status of the asynchronous I/O request
-associated with the structure pointed to by
-.Fa iocb .
-.Pp
-The
-.Fn aio_return
-system call
-should only be called once, to obtain the final status of an asynchronous
-I/O operation once it has completed
-.Xr ( aio_error 2
-returns something other than
-.Er EINPROGRESS ) .
-.Sh RETURN VALUES
-If the asynchronous I/O request has completed, the status is returned
-as described in
-.Xr read 2 ,
-.Xr readv 2 ,
-.Xr write 2 ,
-.Xr writev 2 ,
-or
-.Xr fsync 2 .
-Otherwise,
-.Fn aio_return
-returns \-1 and sets
-.Va errno
-to indicate the error condition.
-.Sh ERRORS
-The
-.Fn aio_return
-system call will fail if:
-.Bl -tag -width Er
-.It Bq Er EINVAL
-The
-.Fa iocb
-argument
-does not reference a completed asynchronous I/O request.
-.It Bq Er EINVAL
-The I/O operation was submitted with
-.Fn lio_listio ,
-and the value of the
-.Fa aio_lio_opcode
-is invalid.
-.El
-.Sh SEE ALSO
-.Xr aio_cancel 2 ,
-.Xr aio_error 2 ,
-.Xr aio_suspend 2 ,
-.Xr aio_waitcomplete 2 ,
-.Xr aio_write 2 ,
-.Xr fsync 2 ,
-.Xr read 2 ,
-.Xr write 2 ,
-.Xr aio 4
-.Sh STANDARDS
-The
-.Fn aio_return
-system call
-is expected to conform to the
-.St -p1003.1
-standard.
-.Sh HISTORY
-The
-.Fn aio_return
-system call first appeared in
-.Fx 3.0 .
-.Sh AUTHORS
-This
-manual page was written by
-.An Wes Peters Aq Mt wes@softweyr.com .