linux man page for aio_cancel

AIO_CANCEL(3)						     Linux Programmer's Manual						     AIO_CANCEL(3)

NAME
       aio_cancel - cancel an outstanding asynchronous I/O request

SYNOPSIS
       #include <aio.h>

       int aio_cancel(int fd, struct aiocb *aiocbp);

       Link with -lrt.

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 canceled.  Otherwise, only the request described by the control block pointed to by aiocbp is canceled.

       Normal asynchronous notification occurs for canceled 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 canceled 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 cancellable is implementation-defined.

RETURN VALUE
       This function returns AIO_CANCELED if all requests were successfully canceled.  It  returns  AIO_NOTCANCELED  when  at  least  one  of  the
       requests  specified  was  not  canceled	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 ALSO
       aio_error(3), aio_fsync(3), aio_read(3), aio_return(3), aio_suspend(3), aio_write(3)

COLOPHON
       This  page is part of release 3.27 of the Linux man-pages project.  A description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

								    2003-11-14							     AIO_CANCEL(3)