NAME
aio_return —
retrieve return status of asynchronous
I/O operation (REALTIME)
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include
<aio.h>
ssize_t
aio_return(struct aiocb
*aiocbp);
DESCRIPTION
The
aio_return()
system call returns the final status of the asynchronous I/O request
associated with the structure pointed to by
aiocbp.
The
aio_return()
system call should only be called once, to obtain the final status of an
asynchronous I/O operation (once
aio_error(2) returns something other than
EINPROGRESS) and to clean up system resources.
However, if aio_return() is not called at all,
aio(4) will leak
resources.
RETURN VALUES
If the asynchronous I/O request has completed, the status is
returned as described in read(2), write(2), or fsync(2). On failure, aio_return()
returns -1 and sets errno to
indicate the error condition.
ERRORS
The aio_return() system call will fail
if:
- [
EINVAL] - The aiocbp argument does not reference an outstanding asynchronous I/O request.
- [
EINPROGRESS] - The asynchronous I/O request is still in progress.
LEGACY SYNOPSIS
#include
<aio.h>
int
aio_return(struct
aiocb *aiocbp);;
The type of the return value has changed.
SEE ALSO
aio_cancel(2), aio_error(2), aio_suspend(2), aio_write(2), fsync(2), read(2), write(2), aio(4), compat(5)
STANDARDS
The aio_return() system call is expected
to conform to the IEEE Std 1003.1
(“POSIX.1”) standard.
HISTORY
The aio_return() system call first
appeared in FreeBSD 3.0.
AUTHORS
This manual page was written by Wes Peters ⟨wes@softweyr.com⟩.