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.Dd October 7, 2006 .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 n aio.h .Ft int .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 .
p 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 write 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: l -tag -width Er t Bq Er EINVAL The .Fa iocb argument does not reference a completed asynchronous I/O request. .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 wes@softweyr.com .