package/base-files/files/etc/hotplug.d/iface/40-rdate

   1 uci_get_one()
   2 {
   3         for var in "$@"; do
   4                 uci -P /var/state get "$var" 2>/dev/null && break
   5         done
   6 }
   7
   8 rand()
   9 {
  10         random=$(awk 'BEGIN { srand(); print int(rand() * 10 + 1); }')
  11 }
  12
  13 sync_rdate()
  14 {
  15         local servers=$(uci_get_one "network.$INTERFACE.lease_timesrv" \
  16                 "system.@rdate[0].server")
  17
  18         if [ -n "$servers" ]; then
  19                 match=0
  20                 tries=3
  21                 rand
  22
  23                 while [ $match = 0 ] && [ $tries != 0 ]; do
  24                         for server in $servers; do
  25                                 if [ $((--random)) = 0 ]; then
  26                                         rdate -s $server >/dev/null 2>/dev/null && {
  27                                                 logger -t rdate "Synced with $server"
  28                                                 match=1
  29                                         } || {
  30                                                 logger -t rdate "Failed to sync with $server"
  31                                                 let tries="$tries - 1"
  32                                                 rand
  33                                         }
  34
  35                                         break
  36                                 fi
  37                         done
  38                 done
  39         else
  40                 logger -t rdate "No usable time server found"
  41         fi
  42 }
  43
  44 case "$ACTION" in
  45         ifup) route -n | grep -q ^0.0.0.0 && sync_rdate;;
  46 esac