packages/bird: use new service functions

git-svn-id: svn://svn.openwrt.org/openwrt/packages@29079 3c298f89-4303-0410-b956-a3cf2f4a3e73

net/bird/files/bird4loop

@@ -2,11 +2,22 @@
 
 BIRD=/usr/sbin/bird4
 
-$BIRD -p
+$BIRD -p || return 1
 
-( until $BIRD -d "$@"
-do
-	logger error BIRD4 died!
-	sleep 2
-done; ) </dev/null >/dev/null 2> /dev/null &
+. /lib/functions.sh
 
+SERVICE_DAEMONIZE=1
+SERVICE_WRITE_PID=1
+
+sig_handler() {
+	running=0
+	service_stop $BIRD
+}
+
+running=1
+trap sig_handler INT
+trap sig_handler TERM
+while [ $running -gt 0 ]; do
+	service_check $BIRD || service_start $BIRD -d "$@"
+	sleep 3
+done