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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
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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
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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
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38.Fo aio_error
39.Fa "const struct aiocb *aiocbp"
40.Fc
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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
2d21ac55 46.Fa aiocbp .
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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
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52is returned.
53If the request has completed unsuccessfully,
54the error status is returned as described in
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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
2d21ac55 72.\" ==========
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73.It Bq Er EINVAL
74The
2d21ac55 75.Fa aiocbp
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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 wes@softweyr.com .