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27 .\" $FreeBSD: /repoman/r/ncvs/src/lib/libc/sys/aio_cancel.2,v 1.22 2003/01/13 10:37:11 tjr Exp $
34 .Nd cancel an outstanding asynchronous I/O operation (REALTIME)
40 .Fn aio_cancel "int fildes" "struct aiocb * aiocbp"
44 system call cancels the outstanding asynchronous
45 I/O request for the file descriptor specified in
49 is specified, only that specific asynchronous I/O request is cancelled.
51 Normal asynchronous notification occurs for cancelled requests.
52 Requests complete with an error result of
57 system call does not cancel asynchronous I/O requests for raw disk devices.
60 system call will always return
62 for file descriptors associated with raw disk devices.
66 system call returns \-1 to indicate an error, or one of the following:
68 .It Bq Dv AIO_CANCELED
69 All outstanding requests meeting the criteria specified were cancelled.
70 .It Bq Dv AIO_NOTCANCELED
71 Some requests were not cancelled, status for the requests should be
75 All of the requests meeting the criteria have finished.
85 argument is an invalid file descriptor.
96 system call is expected to conform to the
102 system call first appeared in