aio_return - get return status of asynchronous I/O operation

       For an explanation of the terms used in this section, see attributes(7).
       ┌─────────────────────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                                                                   │ Attribute     │ Value   │
       ├─────────────────────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │ aio_return()                                                                │ Thread safety │ MT-Safe │
       └─────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘

       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.

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

       ENOSYSaio_return() is not implemented.

       See aio(7).

       glibc 2.1.  POSIX.1-2001.

       Real-time library (librt, -lrt)

       aio_return - get return status of asynchronous I/O operation

       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 to indicate the error.

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

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

Linux man-pages 6.9.1                              2024-05-02                                      aio_return(3)

       POSIX.1-2008.

#include<aio.h>ssize_taio_return(structaiocb*aiocbp);