AIO_RETURN(2) FreeBSD System Calls Manual AIO_RETURN(2)
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 *iocb);
DESCRIPTION
The aio_return() system call returns the final status of the asynchronous
I/O request associated with the structure pointed to by iocb.
The aio_return() system call should only be called once, to obtain the
final status of an asynchronous I/O operation once it has completed
(aio_error(2) returns something other than EINPROGRESS).
RETURN VALUES
If the asynchronous I/O request has completed, the status is returned as
described in read(2), readv(2), write(2), writev(2), or fsync(2).
Otherwise, aio_return() returns -1 and sets errno to indicate the error
condition.
ERRORS
The aio_return() system call will fail if:
[EINVAL] The iocb argument does not reference a completed
asynchronous I/O request.
[EINVAL] The I/O operation was submitted with lio_listio(), and
the value of the aio_lio_opcode is invalid.
SEE ALSO
aio_cancel(2), aio_error(2), aio_suspend(2), aio_waitcomplete(2),
aio_write(2), fsync(2), read(2), write(2), aio(4)
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 <
[email protected]>.
FreeBSD 14.1-RELEASE-p8 January 11, 2021 FreeBSD 14.1-RELEASE-p8