=== 用于启动 cvsupd 的示范 RCng 脚本 ===

注意：下列脚本假定在 /usr/local/etc/cvsup 中存在所需要的sup目录等辅助设置。将脚本放到 /usr/local/etc/rc.d/ 中，并在 /etc/rc.conf[.local|.base] 中加入：

{{{cvsupd_enable="YES"}}}

就会在系统启动时自动运行cvsupd服务了。

{{{#!/bin/sh
#
# Copyright (c) 2005 Xin LI
# 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 THE AUTHOR 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 THE AUTHOR 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.
#
# $FreeBSD$
#

# PROVIDE: cvsupd
# REQUIRE: SERVERS cleanvar
# BEFORE:  DAEMON
# KEYWORD: shutdown

. /etc/rc.subr

name="cvsupd"
rcvar=`set_rcvar`
command="/usr/local/sbin/${name}"
start_precmd="cvsupd_precmd"
evalargs="rc_flags=\"\`set_daemonargs\` \$rc_flags\""
required_dirs="/usr/local/etc/cvsup/sup"

cvsupd_precmd()
{
	eval ${evalargs}
	return 0
}

set_daemonargs()
{
	_daemonargs="-e -C 100 -l @daemon -b /usr/local/etc/cvsup/"
	echo $_daemonargs
}

load_rc_config $name
run_rc_command "$1"
}}}

如果要调试rcNG 脚本可以'''rc_debug=yes -> /etc/rc.conf''' 就可以看到屏幕输出

进一步的man 可以询问`rc.subr`

[[http://cnsnap.cn.freebsd.org/doc/zh_CN.GB2312/books/handbook/configtuning-starting-services.html|FreeBSD-扩展应用程序配置]] 有尽一步的说明…………