1.\" Copyright (c) 1999 Softweyr LLC. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY Softweyr LLC AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL Softweyr LLC OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD: src/lib/libc/sys/aio_error.2,v 1.18 2003/01/13 10:37:11 tjr Exp $ 26.\" 27.Dd June 2, 1999 28.Dt AIO_ERROR 2 29.Os 30.Sh NAME 31.Nm aio_error 32.Nd retrieve error status of asynchronous I/O operation (REALTIME) 33.Sh LIBRARY 34.Lb libc 35.Sh SYNOPSIS 36.In aio.h 37.Ft int 38.Fo aio_error 39.Fa "const struct aiocb *aiocbp" 40.Fc 41.Sh DESCRIPTION 42The 43.Fn aio_error 44system call returns the error status of the asynchronous I/O request 45associated with the structure pointed to by 46.Fa aiocbp . 47.Sh RETURN VALUES 48If the asynchronous I/O request has completed successfully, 49.Fn aio_error 50returns 0. If the request has not yet completed, 51.Er EINPROGRESS 52is returned. 53If the request has completed unsuccessfully, 54the error status is returned as described in 55.Xr read 2 , 56.Xr write 2 , 57or 58.Xr fsync 2 59is returned. 60On failure, 61.Fn aio_error 62returns 63.Dv -1 64and sets 65.Dv errno 66to indicate the error condition. 67.Sh ERRORS 68The 69.Fn aio_error 70system call will fail if: 71.Bl -tag -width Er 72.\" ========== 73.It Bq Er EINVAL 74The 75.Fa aiocbp 76argument 77does not reference an outstanding asynchronous I/O request. 78.El 79.Sh SEE ALSO 80.Xr aio_cancel 2 , 81.Xr aio_read 2 , 82.Xr aio_return 2 , 83.Xr aio_suspend 2 , 84.Xr aio_write 2 , 85.Xr fsync 2 , 86.Xr read 2 , 87.Xr write 2 , 88.Xr aio 4 89.Sh STANDARDS 90The 91.Fn aio_error 92system call 93is expected to conform to the 94.St -p1003.1 95standard. 96.Sh HISTORY 97The 98.Fn aio_error 99system call first appeared in 100.Fx 3.0 . 101.Sh AUTHORS 102This 103manual page was written by 104.An Wes Peters Aq [email protected] . 105