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 NTPC=`which ntpclient`
  11
  12 check_server() {
  13         local hostname
  14         local port
  15         [ -n "$SERVER" ] && return
  16         config_get hostname $1 hostname
  17         config_get port $1 port
  18         [ -z "$hostname" ] && return
  19         $NTPC -c 1 -p ${port:-123} -i 2 -h $hostname > /dev/null && { SERVER=$hostname; PORT=${port:-123}; }
  20 }
  21
  22 set_drift() {
  23         config_get freq $1 freq
  24         [ -n "$freq" ] && adjtimex -f $freq >/dev/null
  25 }
  26
  27 start_ntpclient() {
  28         config_foreach set_drift ntpdrift
  29         config_foreach check_server ntpserver
  30         [ -z "$SERVER" ] && exit 0
  31         logger starting ntpclient
  32         $NTPC ${COUNT:+-c $COUNT} ${INTERVAL:+-i $INTERVAL} -s -l -D -p $PORT -h $SERVER 2> /dev/null
  33 }
  34
  35 stop_ntpclient() {
  36         logger stopping ntpclient
  37         killall ntpclient
  38 }
  39
  40 load_settings() {
  41         local interval
  42         local count
  43         local iface
  44
  45         config_get interval $1 interval
  46         config_get count $1 count
  47
  48         [ -n "$count" ] && COUNT=$count
  49         [ -n "$interval" ] && INTERVAL=$interval
  50 }
  51
  52 config_load ntpclient
  53 config_foreach load_settings ntpclient
  54
  55 NTP_RUNNING=`ps  | grep $NTPC | grep -v grep`
  56
  57 case "${ACTION:-ifup}" in
  58         ifup)
  59                 [ -z "$NTP_RUNNING" ] && start_ntpclient
  60         ;;
  61         ifdown)
  62                 [ -n "$NTP_RUNNING" ] && stop_ntpclient
  63         ;;
  64 esac