aio_cancel
- cancel an outstanding asynchronous I/O operation (REALTIME)
LIBRARY
Lb libc
SYNOPSIS
#include <aio.h> int
aio_cancel (int fildes struct aiocb * iocb);
DESCRIPTION
The
aio_cancel ();
system call cancels the outstanding asynchronous
I/O request for the file descriptor specified in
Fa fildes .
If
Fa iocb
is specified, only that specific asynchronous I/O request is cancelled.
Normal asynchronous notification occurs for cancelled requests.
Requests complete with an error result of
Er ECANCELED .
RESTRICTIONS
The
aio_cancel ();
system call does not cancel asynchronous I/O requests for raw disk devices.
The
aio_cancel ();
system call will always return
AIO_NOTCANCELED
for file descriptors associated with raw disk devices.
RETURN VALUES
The
aio_cancel ();
system call returns -1 to indicate an error, or one of the following:
Bq AIO_CANCELED
All outstanding requests meeting the criteria specified were cancelled.
Bq AIO_NOTCANCELED
Some requests were not cancelled, status for the requests should be
checked with
aio_error2.
Bq AIO_ALLDONE
All of the requests meeting the criteria have finished.
ERRORS
An error return from
aio_cancel ();
indicates:
Bq Er EBADF
The
Fa fildes
argument
is an invalid file descriptor.
The
aio_cancel ();
system call is expected to conform to the
St -p1003.1
standard.
HISTORY
The
aio_cancel ();
system call first appeared in
Fx 3.0 .
The first functional implementation of
aio_cancel ();
appeared in
Fx 4.0 .
AUTHORS
An -nosplit
This
manual page was originally written by
An Wes Peters Aq wes@softweyr.com .
An Christopher M Sedore Aq cmsedore@maxwell.syr.edu
updated it when
aio_cancel ();
was implemented for
Fx 4.0 .
