aio_return(3) Library Functions Manual aio_return(3) NAME aio_return - get return status of asynchronous I/O operation LIBRARY Real-time library (librt, -lrt) SYNOPSIS #include <aio.h> ssize_t aio_return(struct aiocb *aiocbp); 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 to indicate the error. 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 re‐ trieved 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 │ └─────────────────────────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘ STANDARDS 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) Linux man-pages 6.03 2022-12-15 aio_return(3)