vnstat2: add package

This introduces an additional package for version 2 of vnStat.

Signed-off-by: Jan Hoffmann <jan@3e8.eu>

net/vnstat2/files/vnstat.config

@@ -0,0 +1,2 @@
+config vnstat
+#	list interface		br-lan

net/vnstat2/files/vnstat.init

@@ -0,0 +1,61 @@
+#!/bin/sh /etc/rc.common
+
+START=60
+STOP=50
+
+USE_PROCD=1
+
+vnstat_option() {
+	sed -ne "s/^[[:space:]]*$1[[:space:]]*['\"]\([^'\"]*\)['\"].*/\1/p" \
+		/etc/vnstat.conf
+}
+
+init_database() {
+	local lib="$(vnstat_option DatabaseDir)"
+
+	local database_count="$(ls "$lib" 2>/dev/null | wc -l)"
+
+	if [ "$database_count" -eq "0" ]; then
+		/usr/sbin/vnstatd -n --noadd >/dev/null 
+	fi
+}
+
+init_ifaces() {
+	local cfg="$1"
+
+	init_iface() {
+		local ifn="$1"
+
+		/usr/bin/vnstat --add -i "$ifn" >/dev/null
+	}
+
+	config_list_foreach "$cfg" interface init_iface
+
+	return 1
+}
+
+start_service() {
+	init_database
+
+	config_load vnstat
+	config_foreach init_ifaces vnstat
+
+	procd_open_instance
+	procd_set_param stdout 1
+	procd_set_param stderr 1
+	procd_set_param command /usr/sbin/vnstatd --nodaemon
+	procd_set_param file /etc/vnstat.conf
+	procd_set_param respawn
+	procd_close_instance
+}
+
+reload_service() {
+	config_load vnstat
+	config_foreach init_ifaces vnstat
+
+	procd_send_signal vnstat
+}
+
+service_triggers() {
+	procd_add_reload_trigger vnstat
+}