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PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
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AIO_RETURN(3P) POSIX Programmer's Manual AIO_RETURN(3P)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior), or
the interface may not be implemented on Linux.
aio_return — retrieve return status of an asynchronous I/O
operation
#include <aio.h>
ssize_t aio_return(struct aiocb *aiocbp);
The aio_return() function shall return the return status
associated with the aiocb structure referenced by the aiocbp
argument. The return status for an asynchronous I/O operation is
the value that would be returned by the corresponding read(),
write(), or fsync() function call. If the error status for the
operation is equal to [EINPROGRESS], then the return status for
the operation is undefined. The aio_return() function may be
called exactly once to retrieve the return status of a given
asynchronous operation; thereafter, if the same aiocb structure is
used in a call to aio_return() or aio_error(), an error may be
returned. When the aiocb structure referred to by aiocbp is used
to submit another asynchronous operation, then aio_return() may be
successfully used to retrieve the return status of that operation.
If the asynchronous I/O operation has completed, then the return
status, as described for read(), write(), and fsync(), shall be
returned. If the asynchronous I/O operation has not yet completed,
the results of aio_return() are undefined.
If the aio_return() function fails, it shall return -1 and set
errno to indicate the error.
The aio_return() function may fail if:
EINVAL The aiocbp argument does not refer to an asynchronous
operation whose return status has not yet been retrieved.
The following sections are informative.
None.
None.
None.
None.
aio_cancel(3p), aio_error(3p), aio_fsync(3p), aio_read(3p),
aio_write(3p), close(3p), exec(1p), exit(3p), fork(3p),
lio_listio(3p), lseek(3p), read(3p)
The Base Definitions volume of POSIX.1‐2017, aio.h(0p)
Portions of this text are reprinted and reproduced in electronic
form from IEEE Std 1003.1-2017, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The
Open Group Base Specifications Issue 7, 2018 Edition, Copyright
(C) 2018 by the Institute of Electrical and Electronics Engineers,
Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard,
the original IEEE and The Open Group Standard is the referee
document. The original Standard can be obtained online at
http://www.opengroup.org/unix/online.html .
Any typographical or formatting errors that appear in this page
are most likely to have been introduced during the conversion of
the source files to man page format. To report such errors, see
https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2017 AIO_RETURN(3P)
Pages that refer to this page: aio.h(0p), aio_error(3p), aio_fsync(3p), aio_read(3p), aio_write(3p), lio_listio(3p)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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