AIOSUSPEND(2)              BSD System Calls Manual             AIOSUSPEND(2)

NAME
     aiosuspend -- suspend until asynchronous I/O operations or timeout com-
     plete (REALTIME)

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     ##include <>

     int
     aiosuspend(const struct aiocb * const iocbs[], int niocb,
         const struct timespec * timeout);

DESCRIPTION
     The aiosuspend() system call suspends the calling process until at least
     one of the specified asynchronous I/O requests have completed, a signal
     is delivered, or the timeout has passed.

     The iocbs argument is an array of niocb pointers to asynchronous I/O
     requests.  Array members containing NUL will be silently ignored.

     If timeout is a non-nil pointer, it specifies a maximum interval to sus-
     pend.  If timeout is a nil pointer, the suspend blocks indefinitely.  To
     effect a poll, the timeout should point to a zero-value timespec struc-
     ture.

RETURN VALUES
     If one or more of the specified asynchronous I/O requests have completed,
     aiosuspend() returns 0.  Otherwise it returns -1 and sets errno to indi-
     cate the error, as enumerated below.

ERORS
     The aiosuspend() system call will fail if:

     [EAGAIN]           the timeout expired before any I/O requests completed.

     [EINVAL]           The iocbs argument contains more than AIOLISTIOMAX
                        asynchronous I/O requests, or at least one of the
                        requests is not valid.

     [EINTR]            the suspend was interrupted by a signal.

SEE ALSO
     aiocancel(2), aioerror(2), aioreturn(2), aiowrite(2), aio(4)

STANDARDS
     The aiosuspend() system call is expected to conform to the IE Std
     1003.1 (``POSIX.1'') standard.

HISTORY
     The aiosuspend() system call first appeared in FreeBSD 3.0.

AUTHORS
     This manual page was written by Wes Peters .

BSD                              June 2, 1999                              BSD