focal (2) aio_return.2freebsd.gz

Provided by: freebsd-manpages_12.0-1_all bug

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@softweyr.com>.