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(freebsd section 2)
man page for aio_return

AIO_RETURN(2)						      BSD System Calls Manual						     AIO_RETURN(2)

aio_return -- retrieve return status of asynchronous I/O operation (REALTIME) LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <aio.h> int 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 <>. BSD
October 7, 2006 BSD

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