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AIO_RETURN(2) BSD 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), write(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.

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 <wes [AT] softweyr.com>.

BSD March 21, 2016 BSD

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