psntpdate.8

sntp 根据简单网络时间同步协议实现的客户端和服务器程序.

.\"
.\" Copyright(C) 2003 by Kimura Fuyuki <[e-mail]>
.\"
.\" Permission is hereby granted, free of charge, to any person
.\" obtaining a copy of this software and associated documentation
.\" files (the "Software"), to deal in the Software without restriction,
.\" including without limitation the rights to use, copy, modify,
.\" merge, publish, distribute, sublicense, and/or sell copies of
.\" the Software, and to permit persons to whom the Software is
.\" furnished to do so, subject to the following conditions:
.\"
.\" The above copyright notice and this permission notice shall be
.\" included in all copies or substantial portions of the Software.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
.\" EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
.\" OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
.\" NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
.\" BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
.\" AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
.\" OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
.\" IN THE SOFTWARE.
.\"
.\"  $Id: psntpdate.8,v 1.2 2003/04/18 00:42:41 fuyuki Exp $
.\"
.Dd April 14, 2003
.Dt PSNTPDATE 8
.Sh NAME
.Nm psntpdate
.Nd Simple Network Time Protocol (SNTP) client
.Sh SYNOPSIS
.Nm
.Op Fl 46afr
.Ar server
.Sh DESCRIPTION
.Nm
emits an SNTP (RFC 2030) query to the
.Ar server
and print the obtained time or set it to the system clock.
.Pp
The following options may be passed to
.Nm :
.Bl -tag -width indent
.It Fl 4
Forces
.Nm
to only use IPv4 addresses.
.It Fl 6
Forces
.Nm
to only use IPv6 addresses.
.It Fl a
Adjusts the system clock using adjtime(2).
.It Fl f
Forces the clock setting by the
.Fl r
option.
.It Fl r
Resets the system clock using settimeofday(2).
.El
.Sh SEE ALSO
.Xr adjtime 2 ,
.Xr settimeofday 2
.Sh BUGS
The
.Fl f
option combined with the
.Fl a
option is currently just ignored because of its troubling nature.