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AIO_CANCEL(3) Library Functions Manual AIO_CANCEL(3)

aio_cancelcancel an outstanding asynchronous I/O operation (REALTIME)

library “librt”

#include <aio.h>

int
aio_cancel(int fildes, struct aiocb * aiocbp);

The () system call cancels the outstanding asynchronous I/O request for the file descriptor specified in fildes. If aiocbp 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 ECANCELED.

The aio_cancel() system call returns -1 to indicate an error, or one of the following:

[AIO_CANCELED]
All outstanding requests meeting the criteria specified were cancelled.
[AIO_NOTCANCELED]
Some requests were not cancelled, status for the requests should be checked with aio_error(3).
[AIO_ALLDONE]
All of the requests meeting the criteria have finished.

An error return from aio_cancel() indicates:

[]
The fildes argument is an invalid file descriptor.

aio(3)

The aio_cancel() system call is expected to conform to the IEEE Std 1003.1-2001 (“POSIX.1”) standard.

The aio_cancel() system call first appeared in NetBSD 5.0.

May 17, 2010 NetBSD-9.2