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AIO_RETURN(3) Linux Programmer's Manual 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 asyn-
     chronous 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.

EXAMPLE

     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 4.16 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/.

                                2017-09-15                     AIO_RETURN(3)