50-ntp.conf revision e95877ecfa1170d77b1ec1f66752725cdda01b64 
1# Sample dhcpcd hook script for ntp
2
3# Detect OpenRC or BSD rc
4# Distributions may want to just have their command here instead of this
5if type rc-service >/dev/null 2>&1 && rc-service --exists ntpd; then
6	ntpd_restart_cmd="rc-service ntpd -- --ifstarted --quiet restart"
7elif [ -x /etc/rc.d/ntpd ]; then
8	ntpd_restart_cmd="/etc/rc.d/ntpd restart"
9elif [ -x /usr/local/etc/rc.d/ntpd ]; then
10	ntpd_restart_cmd="/usr/local/etc/rc.d/ntpd restart"
11fi
12
13make_ntp_conf()
14{
15	[ -z "${new_ntp_servers}" ] && return 0
16	local cf=/etc/ntp.conf."${interface}" x=
17	echo "${signature}" > "${cf}"
18	echo "restrict default noquery notrust nomodify" >> "${cf}"
19	echo "restrict 127.0.0.1" >> "${cf}"
20	for x in ${new_ntp_servers}; do
21		echo "restrict ${x} nomodify notrap noquery" >> "${cf}"
22		echo "server ${x}" >> "${cf}"
23	done
24	if [ ! -e /etc/ntp.conf ]; then
25		false	
26	elif type cmp >/dev/null 2>&1; then
27		cmp -s /etc/ntp.conf "${cf}"
28	elif type diff >/dev/null 2>&1; then
29		diff -q /etc/ntp.conf "${cf}" >/dev/null
30	else
31		false
32	fi
33	if [ $? = 0 ]; then
34		rm -f "${cf}"
35	else
36		save_conf /etc/ntp.conf
37		mv -f "${cf}" /etc/ntp.conf
38		[ -n "${ntpd_restart_cmd}" ] && ${ntpd_restart_cmd}
39	fi
40}
41
42restore_ntp_conf()
43{
44	restore_conf /etc/ntp.conf || return 0
45	[ -n "${ntpd_restart_cmd}" ] && ${ntpd_restart_cmd}
46}
47
48case "${reason}" in
49BOUND|INFORM|REBIND|REBOOT|RENEW|TIMEOUT)	make_ntp_conf;;
50EXPIRE|FAIL|IPV4LL|RELEASE|STOP)		restore_ntp_conf;;
51esac
52