net/ntpclient/files/ntpclient.hotplug

   1 #!/bin/sh
   2 # Copyright (C) 2006 OpenWrt.org
   3
   4 . /lib/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