[package] base-files: add a hotplug handler for rdate

[openwrt/svn-archive/archive.git] / package / base-files / files / etc / hotplug.d / iface / 40-rdate

diff --git a/package/base-files/files/etc/hotplug.d/iface/40-rdate b/package/base-files/files/etc/hotplug.d/iface/40-rdate
new file mode 100644 (file)
index 0000000..cf56c02
--- /dev/null
+++ b/package/base-files/files/etc/hotplug.d/iface/40-rdate
@@ -0,0 +1,46 @@
+uci_get_one()
+{
+       for var in "$@"; do
+               uci -P /var/state get "$var" 2>/dev/null && break
+       done
+}
+
+rand()
+{
+       random=$(awk 'BEGIN { srand(); print int(rand() * 10 + 1); }')
+}
+
+sync_rdate()
+{
+       local servers=$(uci_get_one "network.$INTERFACE.lease_timesrv" \
+               "system.@rdate[0].server")
+
+       if [ -n "$servers" ]; then
+               match=0
+               tries=3
+               rand
+
+               while [ $match = 0 ] && [ $tries != 0 ]; do
+                       for server in $servers; do
+                               if [ $((--random)) = 0 ]; then
+                                       rdate -s $server >/dev/null 2>/dev/null && {
+                                               logger -t rdate "Synced with $server"
+                                               match=1
+                                       } || {
+                                               logger -t rdate "Failed to sync with $server"
+                                               let tries="$tries - 1"
+                                               rand
+                                       }
+
+                                       break
+                               fi
+                       done
+               done
+       else
+               logger -t rdate "No usable time server found"
+       fi
+}
+
+case "$ACTION" in
+       ifup) route -n | grep -q ^0.0.0.0 && sync_rdate;;
+esac