NAME
aio_cancel —
cancel an outstanding asynchronous I/O
operation (REALTIME)
LIBRARY
library “librt”
SYNOPSIS
#include
<aio.h>
int
aio_cancel(int
fildes, struct aiocb *
aiocbp);
DESCRIPTION
Theaio_cancel()
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.
RETURN VALUES
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.
ERRORS
An error return from aio_cancel()
indicates:
- [
EBADF] - The fildes argument is an invalid file descriptor.
SEE ALSO
STANDARDS
The aio_cancel() system call is expected
to conform to the IEEE Std 1003.1-2001
(“POSIX.1”) standard.
HISTORY
The aio_cancel() system call first
appeared in NetBSD 5.0.