[packages] ntpclient: add option to bind ntpclient to a specific interface (#6470)
[openwrt/svn-archive/archive.git] / net / ntpclient / files / ntpclient.hotplug
1 #!/bin/sh
2 # Copyright (C) 2006 OpenWrt.org
3
4 . /etc/functions.sh
5
6 unset SERVER
7 unset PORT
8 unset INTERVAL
9 unset COUNT
10 unset INTERFACE_GLOBAL
11
12 NTPC=`which ntpclient`
13
14 check_server() {
15 local hostname
16 local port
17 local interface
18 [ -n "$SERVER" ] && return
19 config_get hostname $1 hostname
20 config_get port $1 port
21 config_get interface $1 interface
22
23 [ -z "$interface" ] && interface=$INTERFACE_GLOBAL
24
25 [ -n "$interface" ] && {
26 # $INTERFACE is passed from hotplug event
27 [ "$interface" = "$INTERFACE" ] || return
28 }
29
30 [ -z "$hostname" ] && return
31 $NTPC -c 1 -p ${port:-123} -i 2 -h $hostname > /dev/null && { SERVER=$hostname; PORT=${port:-123}; }
32 }
33
34 set_drift() {
35 config_get freq $1 freq
36 [ -n "$freq" ] && adjtimex -f $freq >/dev/null
37 }
38
39 start_ntpclient() {
40 config_foreach set_drift ntpdrift
41 config_foreach check_server ntpserver
42 [ -z "$SERVER" ] && exit 0
43 logger starting ntpclient
44 $NTPC ${COUNT:+-c $COUNT} ${INTERVAL:+-i $INTERVAL} -s -l -D -p $PORT -h $SERVER 2> /dev/null
45 }
46
47 stop_ntpclient() {
48 logger stopping ntpclient
49 killall ntpclient
50 }
51
52 load_settings() {
53 local interval
54 local count
55 local iface
56
57 config_get interval $1 interval
58 config_get count $1 count
59 config_get interface $1 interface
60
61 [ -n "$count" ] && COUNT=$count
62 [ -n "$interval" ] && INTERVAL=$interval
63 [ -n "$interface" ] && INTERFACE_GLOBAL=$interface
64 }
65
66 config_load ntpclient
67 config_foreach load_settings ntpclient
68
69 NTP_RUNNING=`ps | grep $NTPC | grep -v grep`
70
71 case "${ACTION:-ifup}" in
72 ifup)
73 [ -z "$NTP_RUNNING" ] && start_ntpclient
74 ;;
75 ifdown)
76 [ -n "$NTP_RUNNING" ] && stop_ntpclient
77 ;;
78 esac