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|AIO_CANCEL(2)||System Calls Manual||AIO_CANCEL(2)|
NAME¶aio_cancel — cancel an outstanding asynchronous I/O operation (REALTIME)
LIBRARY¶Standard C Library (libc, -lc)
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 fildes. If 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
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_NOTCANCELEDfor 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:
- All outstanding requests meeting the criteria specified were cancelled.
- Some requests were not cancelled, status for the requests should be checked with aio_error(2).
- All of the requests meeting the criteria have finished.
ERRORS¶An error return from aio_cancel() indicates:
- The fildes argument is an invalid file descriptor.
SEE ALSO¶aio_error(2), aio_read(2), aio_return(2), aio_suspend(2), aio_write(2), aio(4)
STANDARDS¶The aio_cancel() system call is expected to conform to the IEEE Std 1003.1 (“POSIX.1”) standard.
HISTORY¶The aio_cancel() system call first appeared in FreeBSD 3.0. The first functional implementation of aio_cancel() appeared in FreeBSD 4.0.
AUTHORS¶This manual page was originally written by Wes Peters ⟨email@example.com⟩. Christopher M Sedore ⟨firstname.lastname@example.org⟩ updated it when aio_cancel() was implemented for FreeBSD 4.0.
|January 19, 2000||Debian|