openwrt/package/utils/busybox/files/sysntpd
Piotr Dymacz a49503bbc7 sysntpd: restore support for peer-less (standalone) mode
ntpd from Busybox supports peer-less (standalone) mode when it's started
with option -l and without any peer provided with option -p. In this
mode ntpd uses local time as reference and acts as stratum 1 server.

This mode can be used in isolated networks, where Internet access and/or
other NTP server/s are not available, but the device has some other way
of getting correct time, like e.g. GPS (ugps supports setting local time
by default).

Support for this mode was incorrectly disabled/removed in:
1527f96ca6

Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>
Acked-by: Jo-Philipp Wich <jo@mein.io>
2017-04-02 15:09:09 +02:00

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#!/bin/sh /etc/rc.common
# Copyright (C) 2011 OpenWrt.org
START=98
USE_PROCD=1
PROG=/usr/sbin/ntpd
HOTPLUG_SCRIPT=/usr/sbin/ntpd-hotplug
get_dhcp_ntp_servers() {
local interfaces="$1"
local filter="*"
local interface ntpservers ntpserver
for interface in $interfaces; do
[ "$filter" = "*" ] && filter="@.interface='$interface'" || filter="$filter,@.interface='$interface'"
done
ntpservers=$(ubus call network.interface dump | jsonfilter -e "@.interface[$filter]['data']['ntpserver']")
for ntpserver in $ntpservers; do
local duplicate=0
local entry
for entry in $server; do
[ "$ntpserver" = "$entry" ] && duplicate=1
done
[ "$duplicate" = 0 ] && server="$server $ntpserver"
done
}
validate_ntp_section() {
uci_validate_section system timeserver "${1}" \
'server:list(host)' 'enabled:bool:1' 'enable_server:bool:0' 'use_dhcp:bool:1' 'dhcp_interface:list(string)'
}
start_service() {
local server enabled enable_server use_dhcp dhcp_interface peer
validate_ntp_section ntp || {
echo "validation failed"
return 1
}
[ $enabled = 0 ] && return
[ $use_dhcp = 1 ] && get_dhcp_ntp_servers "$dhcp_interface"
[ -z "$server" -a "$enable_server" = "0" ] && return
procd_open_instance
procd_set_param command "$PROG" -n -N
[ "$enable_server" = "1" ] && procd_append_param command -l
[ -x "$HOTPLUG_SCRIPT" ] && procd_append_param command -S "$HOTPLUG_SCRIPT"
for peer in $server; do
procd_append_param command -p $peer
done
procd_set_param respawn
procd_close_instance
}
service_triggers() {
local script name use_dhcp
script=$(readlink -f "$initscript")
name=$(basename ${script:-$initscript})
procd_add_config_trigger "config.change" "system" /etc/init.d/$name reload
config_load system
config_get use_dhcp ntp use_dhcp 1
[ $use_dhcp = 1 ] && {
local dhcp_interface
config_get dhcp_interface ntp dhcp_interface
if [ -n "$dhcp_interface" ]; then
for n in $dhcp_interface; do
procd_add_interface_trigger "interface.*" $n /etc/init.d/$name reload
done
else
procd_add_raw_trigger "interface.*" 1000 /etc/init.d/$name reload
fi
}
procd_add_validation validate_ntp_section
}