AIO_CANCEL(3) Linux Programmer's Manual AIO_CANCEL(3)NAMEaio_cancel - cancel an outstanding asynchronous I/O request
SYNOPSIS
#include <aio.h>
int aio_cancel(int fd, struct aiocb *aiocbp);
DESCRIPTION
The aio_cancel() function attempts to cancel outstanding asynchronous
I/O requests for the file descriptor fd. If aiocbp is NULL, all such
requests are cancelled. Otherwise, only the request described by the
control block pointed to by aiocbp is cancelled.
Normal asynchronous notification occurs for cancelled requests. The
request return status is set to -1, and the request error status is set
to ECANCELED. The control block of requests that cannot be cancelled
is not changed.
If aiocbp is not NULL, and fd differs from the file descriptor with
which the asynchronous operation was initiated, unspecified results
occur.
Which operations are cancelable is implementation-defined.
RETURN VALUE
This function returns AIO_CANCELED if all requests were successfully
cancelled. It returns AIO_NOTCANCELED when at least one of the requests
specified was not cancelled because it was in progress. In this case
one may check the status of individual requests using aio_error(3).
This function returns AIO_ALLDONE when all requests had been completed
already before this call. When some error occurs, -1 is returned, and
errno is set appropriately.
ERRORS
EBADF fd is not a valid file descriptor.
CONFORMING TO
POSIX.1-2001
SEE ALSOaio_error(3), aio_fsync(3), aio_read(3), aio_return(3), aio_suspend(3),
aio_write(3)
2003-11-14 AIO_CANCEL(3)