NAME

       aio_return - get return status of asynchronous I/O operation

SYNOPSIS

       #include <aio.h>

       ssize_t aio_return(struct aiocb *aiocbp);

       Link with -lrt.

DESCRIPTION

       The aio_return() function returns the final return status for the asynchronous I/O request
       with control block pointed to by aiocbp.  (See aio(7)  for  a  description  of  the  aiocb
       structure.)

       This function should be called only once for any given request, after aio_error(3) returns
       something other than EINPROGRESS.

RETURN VALUE

       If the asynchronous I/O operation has completed, this  function  returns  the  value  that
       would  have  been  returned  in  case  of  a  synchronous  read(2),  write(2), fsync(2) or
       fdatasync(2), call.  On error, -1 is returned, and errno is set appropriately.

       If the asynchronous I/O operation has not yet completed, the return value  and  effect  of
       aio_return() are undefined.

ERRORS

       EINVAL aiocbp  does  not point at a control block for an asynchronous I/O request of which
              the return status has not been retrieved yet.

       ENOSYS aio_return() is not implemented.

VERSIONS

       The aio_return() function is available since glibc 2.1.

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).

       ┌─────────────┬───────────────┬─────────┐
       │Interface    │ Attribute     │ Value   │
       ├─────────────┼───────────────┼─────────┤
       │aio_return() │ Thread safety │ MT-Safe │
       └─────────────┴───────────────┴─────────┘

CONFORMING TO

       POSIX.1-2001, POSIX.1-2008.

EXAMPLES

       See aio(7).

SEE ALSO

       aio_cancel(3),  aio_error(3),  aio_fsync(3),  aio_read(3),  aio_suspend(3),  aio_write(3),
       lio_listio(3), aio(7)

COLOPHON

       This  page  is  part of release 5.10 of the Linux man-pages project.  A description of the
       project, information about reporting bugs, and the latest version of  this  page,  can  be
       found at https://www.kernel.org/doc/man-pages/.

                                            2020-06-09                              AIO_RETURN(3)