1999-07-01 19:58:12 +00:00
|
|
|
.\" Copyright (c) 1999 Softweyr LLC.
|
|
|
|
|
.\" All rights reserved.
|
|
|
|
|
.\"
|
|
|
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
|
|
|
.\" modification, are permitted provided that the following conditions
|
|
|
|
|
.\" are met:
|
|
|
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
|
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
|
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
|
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
|
|
|
.\"
|
|
|
|
|
.\" THIS SOFTWARE IS PROVIDED BY Softweyr LLC AND CONTRIBUTORS ``AS IS'' AND
|
|
|
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
|
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
|
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL Softweyr LLC OR CONTRIBUTORS BE LIABLE
|
|
|
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
|
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
|
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
|
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
|
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
|
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
|
|
|
.\" SUCH DAMAGE.
|
|
|
|
|
.\"
|
1999-08-28 00:22:10 +00:00
|
|
|
.\" $FreeBSD$
|
1999-07-01 19:58:12 +00:00
|
|
|
.\"
|
2000-03-21 10:25:22 +00:00
|
|
|
.Dd January 19, 2000
|
1999-07-01 19:58:12 +00:00
|
|
|
.Dt AIO_CANCEL 2
|
|
|
|
|
.Os
|
|
|
|
|
.Sh NAME
|
|
|
|
|
.Nm aio_cancel
|
1999-07-01 21:09:57 +00:00
|
|
|
.Nd cancel an outstanding asynchronous I/O operation (REALTIME)
|
2000-04-21 09:42:15 +00:00
|
|
|
.Sh LIBRARY
|
|
|
|
|
.Lb libc
|
1999-07-01 19:58:12 +00:00
|
|
|
.Sh SYNOPSIS
|
|
|
|
|
.Fd #include <aio.h>
|
|
|
|
|
.Ft int
|
2000-03-21 10:25:22 +00:00
|
|
|
.Fn aio_cancel "int fildes" "struct aiocb * iocb"
|
1999-07-01 19:58:12 +00:00
|
|
|
.Sh DESCRIPTION
|
|
|
|
|
The
|
|
|
|
|
.Fn aio_cancel
|
2000-03-21 10:25:22 +00:00
|
|
|
function cancels the outstanding asynchronous
|
|
|
|
|
I/O request for the file descriptor specified in
|
2000-06-23 05:05:44 +00:00
|
|
|
.Fa fildes .
|
2000-03-21 10:25:22 +00:00
|
|
|
If
|
2000-06-23 05:05:44 +00:00
|
|
|
.Fa iocb
|
2000-03-21 10:25:22 +00:00
|
|
|
is specified, only that specific asynchronous I/O request is cancelled.
|
|
|
|
|
.Pp
|
2000-11-24 10:48:02 +00:00
|
|
|
Normal asynchronous notification occurs for cancelled requests.
|
|
|
|
|
Requests complete with an error result of
|
2000-11-22 16:02:00 +00:00
|
|
|
.Er ECANCELED .
|
2000-03-21 10:25:22 +00:00
|
|
|
.Sh RESTRICTIONS
|
|
|
|
|
The
|
|
|
|
|
.Fn aio_cancel
|
2000-11-24 10:48:02 +00:00
|
|
|
function does not cancel asynchronous I/O requests for raw disk devices.
|
|
|
|
|
The
|
1999-07-01 19:58:12 +00:00
|
|
|
.Fn aio_cancel
|
2000-03-21 10:25:22 +00:00
|
|
|
function will always return
|
|
|
|
|
.Dv AIO_NOTCANCELED
|
|
|
|
|
for file descriptors associated with raw disk devices.
|
1999-07-01 19:58:12 +00:00
|
|
|
.Sh RETURN VALUES
|
2000-03-21 10:25:22 +00:00
|
|
|
The
|
1999-07-01 19:58:12 +00:00
|
|
|
.Fn aio_cancel
|
2000-03-21 10:25:22 +00:00
|
|
|
function returns -1 to indicate an error, or one of the following:
|
|
|
|
|
.Bl -tag -width Dv
|
|
|
|
|
.It Bq Dv AIO_CANCELED
|
|
|
|
|
All outstanding requests meeting the criteria specified were cancelled.
|
|
|
|
|
.It Bq Dv AIO_NOTCANCELED
|
|
|
|
|
Some requests were not cancelled, status for the requests should be
|
2000-05-31 21:12:08 +00:00
|
|
|
checked with
|
|
|
|
|
.Xr aio_error 2 .
|
2000-03-21 10:25:22 +00:00
|
|
|
.It Bq Dv AIO_ALLDONE
|
|
|
|
|
All of the requests meeting the criteria have finished.
|
|
|
|
|
.El
|
1999-07-01 19:58:12 +00:00
|
|
|
.Sh SEE ALSO
|
|
|
|
|
.Xr aio_error 2 ,
|
1999-08-15 09:51:25 +00:00
|
|
|
.Xr aio_read 2 ,
|
1999-07-01 19:58:12 +00:00
|
|
|
.Xr aio_return 2 ,
|
1999-08-15 09:51:25 +00:00
|
|
|
.Xr aio_suspend 2 ,
|
2000-11-15 14:40:14 +00:00
|
|
|
.Xr aio_write 2
|
1999-07-01 19:58:12 +00:00
|
|
|
.Sh ERRORS
|
2000-03-21 10:25:22 +00:00
|
|
|
An error return from
|
1999-07-01 19:58:12 +00:00
|
|
|
.Fn aio_cancel
|
2000-03-21 10:25:22 +00:00
|
|
|
indicates:
|
1999-07-01 19:58:12 +00:00
|
|
|
.Bl -tag -width Er
|
2000-03-21 10:25:22 +00:00
|
|
|
.It Bq Er EBADF
|
2000-06-23 05:05:44 +00:00
|
|
|
.Fa fildes
|
2000-03-21 10:25:22 +00:00
|
|
|
is an invalid file descriptor.
|
1999-07-01 19:58:12 +00:00
|
|
|
.El
|
|
|
|
|
.Sh STANDARDS
|
2000-03-21 10:25:22 +00:00
|
|
|
The
|
|
|
|
|
.Fn aio_cancel
|
|
|
|
|
function is expected to conform to the
|
1999-07-01 19:58:12 +00:00
|
|
|
.St -p1003.2
|
|
|
|
|
standard.
|
|
|
|
|
.Sh HISTORY
|
|
|
|
|
The
|
2000-03-21 10:25:22 +00:00
|
|
|
.Fn aio_cancel
|
1999-07-01 19:58:12 +00:00
|
|
|
function first appeared in
|
|
|
|
|
.Fx 3.0 .
|
2000-11-24 10:48:02 +00:00
|
|
|
The first functional implementation of
|
2000-03-21 10:25:22 +00:00
|
|
|
.Fn aio_cancel
|
|
|
|
|
appeared in
|
|
|
|
|
.Fx 4.0 .
|
1999-08-15 09:51:25 +00:00
|
|
|
.Sh AUTHORS
|
2000-11-22 09:23:54 +00:00
|
|
|
.An -nosplit
|
1999-07-01 19:58:12 +00:00
|
|
|
This
|
2000-03-21 10:25:22 +00:00
|
|
|
manual page was originally written by
|
1999-07-01 19:58:12 +00:00
|
|
|
.An Wes Peters Aq wes@softweyr.com .
|
2000-03-21 10:25:22 +00:00
|
|
|
.An Christopher M Sedore Aq cmsedore@maxwell.syr.edu
|
|
|
|
|
updated it when
|
|
|
|
|
.Fn aio_cancel
|
2000-06-23 03:50:32 +00:00
|
|
|
was implemented for
|
|
|
|
|
.Fx 4.0 .
|
