Add script to save vnstat data

openmptcprouter/files/etc/crontabs/vnstat

@@ -0,0 +1 @@
+* */12 * * * /etc/init.d/vnstat_backup backup

openmptcprouter/files/etc/init.d/vnstat_backup

@@ -0,0 +1,53 @@
+#!/bin/sh /etc/rc.common
+ 
+EXTRA_COMMANDS="backup restore"
+EXTRA_HELP=<<EOF
+        backup  Backup vnstat database
+        restore Restore vnstat database
+EOF
+ 
+START=98
+STOP=10
+ 
+vnstat_option() {
+    sed -ne "s/^[[:space:]]*$1[[:space:]]*['\"]\([^'\"]*\)['\"].*/\1/p" /etc/vnstat.conf
+}
+ 
+BACKUP_FILE=/etc/vnstat_backup.tar.gz
+LOGGER_TAG=vnstat_backup
+VNSTAT_DIR="$(vnstat_option DatabaseDir)"
+ 
+backup_database() {
+	if [ ! -d $VNSTAT_DIR ]; then
+		logger -t $LOGGER_TAG -p err "cannot backup, data directory $VNSTAT_DIR does not exist (yet)"
+	else
+		logger -t $LOGGER_TAG -p info "backing up database"
+		/bin/tar -zcf $BACKUP_FILE -C $VNSTAT_DIR .
+	fi
+}
+ 
+restore_database() {
+	if [ ! -f $BACKUP_FILE ]; then
+		logger -t $LOGGER_TAG -p err "cannot restore, backup file does not exist (yet)"
+	else
+		logger -t $LOGGER_TAG -p info 'restoring database'
+		[ ! -d $VNSTAT_DIR ] && mkdir $VNSTAT_DIR
+		/bin/tar -xzf $BACKUP_FILE -C $VNSTAT_DIR
+	fi
+}
+ 
+start() {
+	restore_database
+}
+ 
+stop() {
+	backup_database
+}
+ 
+backup() {
+	backup_database
+}
+ 
+restore() {
+	restore_database
+}