1999-07-01 19:58:12 +00:00
|
|
|
.\" Copyright (c) 1999 Softweyr LLC.
|
|
|
|
.\" All rights reserved.
|
|
|
|
.\"
|
|
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
|
|
.\" modification, are permitted provided that the following conditions
|
|
|
|
.\" are met:
|
|
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
|
|
.\"
|
|
|
|
.\" THIS SOFTWARE IS PROVIDED BY Softweyr LLC AND CONTRIBUTORS ``AS IS'' AND
|
|
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL Softweyr LLC OR CONTRIBUTORS BE LIABLE
|
|
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
|
|
.\" SUCH DAMAGE.
|
|
|
|
.\"
|
1999-08-28 00:22:10 +00:00
|
|
|
.\" $FreeBSD$
|
1999-07-01 19:58:12 +00:00
|
|
|
.\"
|
2020-12-11 00:28:28 +00:00
|
|
|
.Dd October 23, 2017
|
1999-07-01 19:58:12 +00:00
|
|
|
.Dt AIO_SUSPEND 2
|
|
|
|
.Os
|
|
|
|
.Sh NAME
|
|
|
|
.Nm aio_suspend
|
1999-07-01 21:09:57 +00:00
|
|
|
.Nd suspend until asynchronous I/O operations or timeout complete (REALTIME)
|
2000-04-21 09:42:15 +00:00
|
|
|
.Sh LIBRARY
|
|
|
|
.Lb libc
|
1999-07-01 19:58:12 +00:00
|
|
|
.Sh SYNOPSIS
|
2001-10-01 16:09:29 +00:00
|
|
|
.In aio.h
|
1999-07-01 19:58:12 +00:00
|
|
|
.Ft int
|
2008-04-03 02:41:54 +00:00
|
|
|
.Fn aio_suspend "const struct aiocb *const iocbs[]" "int niocb" "const struct timespec *timeout"
|
1999-07-01 19:58:12 +00:00
|
|
|
.Sh DESCRIPTION
|
|
|
|
The
|
|
|
|
.Fn aio_suspend
|
2002-12-18 09:22:32 +00:00
|
|
|
system call suspends the calling process until at least one of the
|
1999-09-20 18:30:55 +00:00
|
|
|
specified asynchronous I/O requests have completed, a signal is
|
|
|
|
delivered, or the
|
2000-06-23 05:05:44 +00:00
|
|
|
.Fa timeout
|
1999-07-01 19:58:12 +00:00
|
|
|
has passed.
|
1999-09-20 18:30:55 +00:00
|
|
|
.Pp
|
2002-12-19 09:40:28 +00:00
|
|
|
The
|
2000-06-23 05:05:44 +00:00
|
|
|
.Fa iocbs
|
2002-12-19 09:40:28 +00:00
|
|
|
argument
|
1999-07-01 19:58:12 +00:00
|
|
|
is an array of
|
2000-06-23 05:05:44 +00:00
|
|
|
.Fa niocb
|
2004-07-02 23:52:20 +00:00
|
|
|
pointers to asynchronous I/O requests.
|
|
|
|
Array members containing
|
2004-12-23 23:45:25 +00:00
|
|
|
null pointers will be silently ignored.
|
1999-10-09 01:35:58 +00:00
|
|
|
.Pp
|
|
|
|
If
|
2000-06-23 05:05:44 +00:00
|
|
|
.Fa timeout
|
2004-12-23 23:45:25 +00:00
|
|
|
is not a null pointer, it specifies a maximum interval to suspend.
|
1999-10-09 01:35:58 +00:00
|
|
|
If
|
2000-06-23 05:05:44 +00:00
|
|
|
.Fa timeout
|
2004-12-23 23:45:25 +00:00
|
|
|
is a null pointer, the suspend blocks indefinitely.
|
2004-07-02 23:52:20 +00:00
|
|
|
To effect a
|
1999-10-09 01:35:58 +00:00
|
|
|
poll, the
|
2000-06-23 05:05:44 +00:00
|
|
|
.Fa timeout
|
1999-10-09 01:35:58 +00:00
|
|
|
should point to a zero-value timespec structure.
|
1999-07-01 19:58:12 +00:00
|
|
|
.Sh RETURN VALUES
|
1999-09-20 18:30:55 +00:00
|
|
|
If one or more of the specified asynchronous I/O requests have
|
|
|
|
completed,
|
1999-07-01 19:58:12 +00:00
|
|
|
.Fn aio_suspend
|
2004-07-02 23:52:20 +00:00
|
|
|
returns 0.
|
|
|
|
Otherwise it returns -1 and sets
|
1999-09-20 18:30:55 +00:00
|
|
|
.Va errno
|
|
|
|
to indicate the error, as enumerated below.
|
1999-07-01 19:58:12 +00:00
|
|
|
.Sh ERRORS
|
|
|
|
The
|
|
|
|
.Fn aio_suspend
|
2002-12-18 09:22:32 +00:00
|
|
|
system call will fail if:
|
1999-07-01 19:58:12 +00:00
|
|
|
.Bl -tag -width Er
|
1999-09-20 18:30:55 +00:00
|
|
|
.It Bq Er EAGAIN
|
|
|
|
the
|
2000-06-23 05:05:44 +00:00
|
|
|
.Fa timeout
|
1999-09-20 18:30:55 +00:00
|
|
|
expired before any I/O requests completed.
|
1999-07-01 19:58:12 +00:00
|
|
|
.It Bq Er EINVAL
|
2002-12-19 09:40:28 +00:00
|
|
|
The
|
2000-06-23 05:05:44 +00:00
|
|
|
.Fa iocbs
|
2002-12-19 09:40:28 +00:00
|
|
|
argument
|
2017-10-23 23:12:01 +00:00
|
|
|
contains more asynchronous I/O requests than the
|
|
|
|
.Va vfs.aio.max_aio_queue_per_proc
|
|
|
|
.Xr sysctl 8
|
|
|
|
variable, or at least one of the requests is not valid.
|
1999-07-01 19:58:12 +00:00
|
|
|
.It Bq Er EINTR
|
|
|
|
the suspend was interrupted by a signal.
|
|
|
|
.El
|
2002-10-22 16:12:27 +00:00
|
|
|
.Sh SEE ALSO
|
|
|
|
.Xr aio_cancel 2 ,
|
|
|
|
.Xr aio_error 2 ,
|
|
|
|
.Xr aio_return 2 ,
|
|
|
|
.Xr aio_waitcomplete 2 ,
|
|
|
|
.Xr aio_write 2 ,
|
2002-10-24 12:57:05 +00:00
|
|
|
.Xr aio 4
|
1999-07-01 19:58:12 +00:00
|
|
|
.Sh STANDARDS
|
2002-12-18 09:22:32 +00:00
|
|
|
The
|
1999-07-01 19:58:12 +00:00
|
|
|
.Fn aio_suspend
|
2002-12-18 09:22:32 +00:00
|
|
|
system call
|
1999-07-01 19:58:12 +00:00
|
|
|
is expected to conform to the
|
2003-01-13 10:37:11 +00:00
|
|
|
.St -p1003.1
|
1999-07-01 19:58:12 +00:00
|
|
|
standard.
|
|
|
|
.Sh HISTORY
|
|
|
|
The
|
2002-12-18 09:22:32 +00:00
|
|
|
.Fn aio_suspend
|
|
|
|
system call first appeared in
|
1999-07-01 19:58:12 +00:00
|
|
|
.Fx 3.0 .
|
1999-08-15 09:51:25 +00:00
|
|
|
.Sh AUTHORS
|
1999-07-01 19:58:12 +00:00
|
|
|
This
|
|
|
|
manual page was written by
|
2014-06-23 08:25:03 +00:00
|
|
|
.An Wes Peters Aq Mt wes@softweyr.com .
|