ntpd: add hotplug script that signals when ntp reaches the stratum level like the sysntp implementation

use ntpq to check the status of the ntp server as all other status scripts included in the ntp tarball are
	based on perl which would dramatically increase the footprint of ntpd

Signed-off-by: Peter Wagner <tripolar@gmx.at>

net/ntpd/Makefile

@@ -13,7 +13,7 @@ PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=http://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-4.2/
-PKG_MD5SUM:=857452b05f5f2e033786f77ade1974ed
+PKG_HASH:=b724287778e1bac625b447327c9851eedef020517a3545625e9f652a90f30b72
 
 PKG_LICENSE:=Unique
 PKG_LICENSE_FILES:=COPYRIGHT html/copyright.html
@@ -115,6 +115,9 @@ CONFIGURE_ARGS += \
 define Package/ntpd/install
 	$(INSTALL_DIR) $(1)/sbin
 	$(INSTALL_BIN) $(PKG_BUILD_DIR)/ntpd/ntpd $(1)/sbin/
+	$(INSTALL_DIR) $(1)/usr/sbin
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/ntpq/ntpq $(1)/usr/sbin/
+	$(INSTALL_BIN) ./files/ntpd.hotplug-helper $(1)/usr/sbin/ntpd.hotplug-helper
 	$(INSTALL_DIR) $(1)/etc
 	$(INSTALL_CONF) ./files/ntp.conf $(1)/etc/
 	$(INSTALL_DIR) $(1)/etc/init.d
@@ -145,7 +148,6 @@ endef
 define Package/ntp-utils/install
 	$(INSTALL_DIR) $(1)/usr/sbin
 	$(INSTALL_BIN) $(PKG_BUILD_DIR)/ntpdc/ntpdc $(1)/usr/sbin/
-	$(INSTALL_BIN) $(PKG_BUILD_DIR)/ntpq/ntpq $(1)/usr/sbin/
 	$(INSTALL_BIN) $(PKG_BUILD_DIR)/util/ntptime $(1)/usr/sbin/
 endef
 

net/ntpd/files/ntpd.hotplug-helper

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+HOTPLUG_SCRIPT=/usr/sbin/ntpd-hotplug
+
+while true
+do
+	STATUS="$(ntpq -c 'rv 0 stratum'|awk -F '=' '{ print $2 }')"
+
+	if [ -n "$STATUS" ] && [ "$STATUS" -lt "16" ]
+	then
+		ACTION="stratum" /sbin/hotplug-call ntp
+		exit 0
+	fi
+	sleep 10
+done

net/ntpd/files/ntpd.init

@@ -5,14 +5,18 @@ START=65
 STOP=65
 
 USE_PROCD=1
+PROG=/sbin/ntpd
+HOTPLUG_HELPER=/usr/sbin/ntpd.hotplug-helper
 
 start_service() {
-#	ln -sf /dev/ttyS0 /dev/gps0
-#	/usr/sbin/setgarmin -d /dev/gps -c /etc/setgarmin.conf
 	mkdir -p /var/lib/ntp
 	chown -R ntp:ntp /var/lib/ntp
 
 	procd_open_instance
-	procd_set_param command /sbin/ntpd -g -u ntp:ntp -p /var/run/ntpd.pid -n
+	procd_set_param command $PROG -g -u ntp:ntp -p /var/run/ntpd.pid -n
+	procd_close_instance
+
+	procd_open_instance
+	procd_set_param command $HOTPLUG_HELPER
 	procd_close_instance
 }