| .TH aio_error 3 2002-09-12 "Linux 2.4" Linux AIO" |
| .SH NAME |
| aio_error \- Getting the Status of AIO Operations |
| .SH SYNOPSYS |
| .nf |
| .B #include <errno.h> |
| .sp |
| .br |
| .B #include <aio.h> |
| .sp |
| .br |
| .BI "int aio_error (const struct aiocb *aiocbp)" |
| .fi |
| .SH DESCRIPTION |
| The function |
| .IR aio_error |
| determines the error state of the request described by the |
| .IR "struct aiocb" |
| variable pointed to by |
| .I aiocbp |
| . |
| |
| When the operation is performed truly asynchronously (as with |
| .IR "aio_read" |
| and |
| .IR "aio_write" |
| and with |
| .IR "lio_listio" |
| when the mode is |
| .IR "LIO_NOWAIT" |
| ), one sometimes needs to know whether a |
| specific request already terminated and if so, what the result was. |
| When the sources are compiled with |
| .IR "_FILE_OFFSET_BITS == 64" |
| this function is in fact |
| .IR "aio_error64" |
| since the LFS interface transparently replaces the normal implementation. |
| .SH "RETURN VALUES" |
| If the request has not yet terminated the value returned is always |
| .IR "EINPROGRESS" |
| . Once the request has terminated the value |
| .IR "aio_error" |
| returns is either |
| .I 0 |
| if the request completed successfully or it returns the value which would be stored in the |
| .IR "errno" |
| variable if the request would have been done using |
| .IR "read" |
| , |
| .IR "write" |
| , or |
| .IR "fsync" |
| . |
| .SH ERRORS |
| .TP |
| .IR "ENOSYS" |
| if it is not implemented. It |
| could also return |
| .TP |
| .IR "EINVAL" |
| if the |
| .I aiocbp |
| parameter does not |
| refer to an asynchronous operation whose return status is not yet known. |
| .SH "SEE ALSO" |
| .BR aio(3), |
| .BR aio_cancel(3), |
| .BR aio_cancel64(3), |
| .BR aio_error64(3), |
| .BR aio_fsync(3), |
| .BR aio_fsync64(3), |
| .BR aio_init(3), |
| .BR aio_read(3), |
| .BR aio_read64(3), |
| .BR aio_return(3), |
| .BR aio_return64(3), |
| .BR aio_suspend(3), |
| .BR aio_suspend64(3), |
| .BR aio_write(3), |
| .BR aio_write64(3), |
| .BR errno(3), |
