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.Dd June 2, 1999
.Dt AIO_CANCEL 2
.Os
.Sh NAME
.Nm aio_cancel
.Nd cancel an outstanding asynchronus I/O operation (REALTIME)
.Sh SYNOPSIS
.Fd #include <aio.h>
.Ft int
.Fn aio_cancel "int something" "struct aiocb * iocb"
.Sh DESCRIPTION
The
.Fn aio_cancel
function is supposed to cancel the specified outstanding asynchronous
I/O request.
.Fn aio_cancel
is not implemented at this time, and always fails returning
.Dv ENOSYS .
.Sh RETURN VALUES
When
.Fn aio_cancel
inevitably fails, it returns
.Dv ENOSYS
to signify it is not supported.
.Sh SEE ALSO
.Xr aio_read 2 ,
.Xr aio_write 2 ,
.Xr aio_error 2 ,
.Xr aio_return 2 ,
.Xr aio_suspend 2 .
.Sh ERRORS
The
.Fn aio_cancel
function currently always fails, due to:
.Bl -tag -width Er
.It Bq Er ENOSYS
this operation is not implemented at this time.
.El
.Sh STANDARDS
.Nm
fails to conform to the
.St -p1003.2
standard.
.Sh HISTORY
The
.Nm
function first appeared in
.Fx 3.0 .
.Sh AUTHOR
This
manual page was written by
.An Wes Peters Aq wes@softweyr.com .
.Sh BUGS
Are now movie stars.