AIO_RETURN(3)             (2020-06-09)              AIO_RETURN(3)

     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 func-
          tion 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 asyn-
               chronous 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).  allbox; lb lb lb l l l.
          Interface Attribute Value T{ aio_return() T}   Thread
          safety  MT-Safe

     CONFORMING TO
          POSIX.1-2001, POSIX.1-2008.

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     AIO_RETURN(3)             (2020-06-09)              AIO_RETURN(3)

     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/.

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