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AIO_CANCEL(3) Library Functions Manual AIO_CANCEL(3) NAME aio_cancel - cancel an outstanding asynchronous I/O operation (REALTIME) LIBRARY POSIX Real-time Library (librt, -lrt) SYNOPSIS #include <aio.h> int aio_cancel(int fildes, struct aiocb * aiocbp); DESCRIPTION The aio_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 aio(3) 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. NetBSD 8.0 May 17, 2010 NetBSD 8.0