#!/bin/bash # # .---. . . # | | | # |--- .--. .-. .-. .-.| .-. .--.--. |.-. .-. .--. .-. # | | (.-' (.-' ( | ( )| | | | )( )| | (.-' # ' ' --' --' -' - -' ' ' -' -' -' ' - --' # # Freedom in the Cloud # # Restore from a given remote server # License # ======= # # Copyright (C) 2015-2016 Bob Mottram # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU Affero General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU Affero General Public License for more details. # # You should have received a copy of the GNU Affero General Public License # along with this program. If not, see . PROJECT_NAME='freedombone' COMPLETION_FILE=$HOME/${PROJECT_NAME}-completed.txt CONFIG_FILE=$HOME/${PROJECT_NAME}.cfg BACKUP_EXTRA_DIRECTORIES=/root/backup-extra-dirs.csv export TEXTDOMAIN=${PROJECT_NAME}-restore-remote export TEXTDOMAINDIR="/usr/share/locale" SERVER_NAME=$1 # whether to restore everything or just a specific application RESTORE_APP='all' if [ ${2} ]; then RESTORE_APP=${2} fi ADMIN_USERNAME=$(cat $COMPLETION_FILE | grep "Admin user" | -nawk -F ':' '{print $2}') ADMIN_EMAIL_ADDRESS=${ADMIN_USERNAME}@${HOSTNAME} # Temporary location for data to be backed up to other servers SERVER_DIRECTORY=/root/remoterestore BACKUP_LIST=/home/${ADMIN_USERNAME}/backup.list if [ ! $SERVER_NAME ]; then echo $'restorefromfriend [server]' exit 1 fi if [ ! -f $BACKUP_LIST ]; then echo $"No friends list found at $BACKUP_LIST" exit 2 fi if ! grep -q "$SERVER_NAME" $BACKUP_LIST; then echo $"Server not found within the friends list" exit 3 fi REMOTE_SERVER=$(grep -i "$SERVER_NAME" $BACKUP_LIST | awk -F ' ' '{print $1}') REMOTE_SSH_PORT=$(grep -i "$SERVER_NAME" $BACKUP_LIST | awk -F ' ' '{print $2}') REMOTE_DIRECTORY=$(grep -i "$SERVER_NAME" $BACKUP_LIST | awk -F ' ' '{print $3}') REMOTE_PASSWORD=$(grep -i "$SERVER_NAME" $BACKUP_LIST | awk -F ' ' '{print $4}') REMOTE_SERVER=$REMOTE_SERVER:$REMOTE_DIRECTORY NOW=$(date +"%Y-%m-%d %H:%M:%S") echo "$NOW Starting restore from $REMOTE_SERVER" >> /var/log/remotebackups.log rsync -ratlzv --rsh="/usr/bin/sshpass -p $REMOTE_PASSWORD ssh -p $REMOTE_SSH_PORT -o StrictHostKeyChecking=no" $REMOTE_SERVER/backup $SERVER_DIRECTORY if [ ! "$?" = "0" ]; then echo "$NOW Restore from $REMOTE_SERVER failed" >> /var/log/remotebackups.log # Send a warning email echo "Restore from $REMOTE_SERVER failed" | mail -s "${PROJECT_NAME} restore from friend" $ADMIN_EMAIL_ADDRESS exit 790 else echo "$NOW Restored encrypted data from $REMOTE_SERVER" >> /var/log/remotebackups.log fi # get the version of Go being used GO_VERSION=$(cat /usr/share/${PROJECT_NAME}/utils/${PROJECT_NAME}-utils-go | grep 'GO_VERSION=' | head -n 1 | awk -F '=' '{print $2}') # MariaDB password DATABASE_PASSWORD=$(cat /root/dbpass) function restore_directory_from_friend { if [ ! -d ${1} ]; then mkdir ${1} fi obnam restore -r $SERVER_DIRECTORY/backup/${2} --to ${1} } function copy_gpg_keys { echo $"Copying GPG keys from admin user to root" cp -r /home/$ADMIN_USERNAME/.gnupg /root } function restore_configuration { if [[ $RESTORE_APP != 'all' ]]; then if [[ $RESTORE_APP != 'configuration' ]]; then return fi fi if [ -d $SERVER_DIRECTORY/backup/config ]; then echo $"Restoring configuration files" temp_restore_dir=/root/tempconfig restore_directory_from_friend $temp_restore_dir config cp -f $temp_restore_dir/root/${PROJECT_NAME}.cfg $CONFIG_FILE if [ ! "$?" = "0" ]; then unmount_drive rm -rf $temp_restore_dir exit 5372 fi if [ -f $CONFIG_FILE ]; then # install according to the config file freedombone -c $CONFIG_FILE fi cp -f $temp_restore_dir/root/${PROJECT_NAME}-completed.txt $COMPLETION_FILE if [ ! "$?" = "0" ]; then unmount_drive rm -rf $temp_restore_dir exit 7252 fi if [ -f ${temp_restore_dir}${BACKUP_EXTRA_DIRECTORIES} ]; then cp -f ${temp_restore_dir}${BACKUP_EXTRA_DIRECTORIES} ${BACKUP_EXTRA_DIRECTORIES} if [ ! "$?" = "0" ]; then unmount_drive rm -rf $temp_restore_dir exit 62121 fi fi # restore nginx password hashes if [ -f $temp_restore_dir/root/htpasswd ]; then cp -f $temp_restore_dir/root/htpasswd /etc/nginx/.htpasswd fi rm -rf $temp_restore_dir fi } function restore_mariadb { if [[ $RESTORE_APP != 'all' ]]; then if [[ $RESTORE_APP != 'mariadb' ]]; then return fi fi if [ -d $SERVER_DIRECTORY/backup/mariadb ]; then echo $"Restoring MariaDB settings" temp_restore_dir=/root/tempmariadb restore_directory_from_friend $temp_restore_dir mariadb echo $"Get the MariaDB password from the backup" if [ ! -f ${temp_restore_dir}${temp_restore_dir}/db ]; then echo $"MariaDB password file not found" exit 495 fi BACKUP_MARIADB_PASSWORD=$(cat ${temp_restore_dir}${temp_restore_dir}/db) if [[ "$BACKUP_MARIADB_PASSWORD" != "$DATABASE_PASSWORD" ]]; then echo $"Restore the MariaDB user table" mysqlsuccess=$(mysql -u root --password="$DATABASE_PASSWORD" mysql -o < ${temp_restore_dir}${temp_restore_dir}/mysql.sql) if [ ! "$?" = "0" ]; then echo $"Try again using the password obtained from backup" mysqlsuccess=$(mysql -u root --password="$BACKUP_MARIADB_PASSWORD" mysql -o < ${temp_restore_dir}${temp_restore_dir}/mysql.sql) fi if [ ! "$?" = "0" ]; then echo "$mysqlsuccess" exit 962 fi echo $"Restarting database" service mysql restart echo $"Change the MariaDB password to the backup version" DATABASE_PASSWORD=$BACKUP_MARIADB_PASSWORD fi shred -zu ${temp_restore_dir}${temp_restore_dir}/db rm -rf ${temp_restore_dir} # Change database password file echo "$DATABASE_PASSWORD" > /root/dbpass chmod 600 /root/dbpass fi } function restore_letsencrypt { if [[ $RESTORE_APP != 'all' ]]; then if [[ $RESTORE_APP != 'letsencrypt' ]]; then return fi fi if [ -d $SERVER_DIRECTORY/backup/letsencrypt ]; then echo $"Restoring Lets Encrypt settings" restore_directory_from_friend / letsencrypt fi } function restore_tor { if [[ $RESTORE_APP != 'all' ]]; then if [[ $RESTORE_APP != 'tor' ]]; then return fi fi if [ -d $SERVER_DIRECTORY/backup/tor ]; then echo $"Restoring Tor settings" restore_directory_from_friend / tor fi } function restore_mutt_settings { if [[ $RESTORE_APP != 'all' ]]; then if [[ $RESTORE_APP != 'mutt' ]]; then return fi fi for d in $SERVER_DIRECTORY/backup/mutt/*/ ; do USERNAME=$(echo "$d" | awk -F '/' '{print $6}') if [[ $USERNAME != "git" && $USERNAME != "mirrors" && $USERNAME != "sync" && $USERNAME != "tahoelafs" ]]; then if [ -d $SERVER_DIRECTORY/backup/mutt/$USERNAME ]; then if [ ! -d /home/$USERNAME ]; then ${PROJECT_NAME}-adduser $USERNAME fi echo $"Restoring Mutt settings for $USERNAME" temp_restore_dir=/root/tempmutt restore_directory_from_friend ${temp_restore_dir} mutt/$USERNAME if [ -f ${temp_restore_dir}/home/$USERNAME/tempbackup/.muttrc ]; then cp -f ${temp_restore_dir}/home/$USERNAME/tempbackup/.muttrc /home/$USERNAME/.muttrc fi if [ -f ${temp_restore_dir}/home/$USERNAME/tempbackup/Muttrc ]; then cp -f ${temp_restore_dir}/home/$USERNAME/tempbackup/Muttrc /etc/Muttrc fi if [ ! "$?" = "0" ]; then rm -rf ${temp_restore_dir} exit 276 fi rm -rf ${temp_restore_dir} fi fi done } function restore_gpg { if [[ $RESTORE_APP != 'all' ]]; then if [[ $RESTORE_APP != 'gpg' ]]; then return fi fi for d in $SERVER_DIRECTORY/backup/gnupg/*/ ; do USERNAME=$(echo "$d" | awk -F '/' '{print $6}') if [[ $USERNAME != "git" && $USERNAME != "mirrors" && $USERNAME != "sync" && $USERNAME != "tahoelafs" ]]; then if [ -d $SERVER_DIRECTORY/backup/gnupg/$USERNAME ]; then if [ ! -d /home/$USERNAME ]; then ${PROJECT_NAME}-adduser $USERNAME fi echo $"Restoring gnupg settings for $USERNAME" temp_restore_dir=/root/tempgnupg restore_directory_from_friend ${temp_restore_dir} gnupg/$USERNAME cp -r ${temp_restore_dir}/home/$USERNAME/.gnupg /home/$USERNAME/ if [ ! "$?" = "0" ]; then rm -rf ${temp_restore_dir} exit 276 fi rm -rf ${temp_restore_dir} if [[ "$USERNAME" == "$ADMIN_USERNAME" ]]; then cp -r /home/$USERNAME/.gnupg /root if [ ! "$?" = "0" ]; then exit 283 fi fi fi fi done } function restore_procmail { if [[ $RESTORE_APP != 'all' ]]; then if [[ $RESTORE_APP != 'procmail' ]]; then return fi fi for d in $SERVER_DIRECTORY/backup/procmail/*/ ; do USERNAME=$(echo "$d" | awk -F '/' '{print $6}') if [[ $USERNAME != "git" && $USERNAME != "mirrors" && $USERNAME != "sync" && $USERNAME != "tahoelafs" ]]; then if [ -d $SERVER_DIRECTORY/backup/procmail/$USERNAME ]; then if [ ! -d /home/$USERNAME ]; then ${PROJECT_NAME}-adduser $USERNAME fi echo $"Restoring procmail settings for $USERNAME" temp_restore_dir=/root/tempprocmail restore_directory_from_friend ${temp_restore_dir} procmail/$USERNAME cp -f ${temp_restore_dir}/home/$USERNAME/tempbackup/.procmailrc /home/$USERNAME/ if [ ! "$?" = "0" ]; then rm -rf ${temp_restore_dir} exit 276 fi rm -rf ${temp_restore_dir} fi fi done } function restore_spamassassin { if [[ $RESTORE_APP != 'all' ]]; then if [[ $RESTORE_APP != 'spamassassin' ]]; then return fi fi for d in $SERVER_DIRECTORY/backup/spamassassin/*/ ; do USERNAME=$(echo "$d" | awk -F '/' '{print $6}') if [[ $USERNAME != "git" && $USERNAME != "mirrors" && $USERNAME != "sync" && $USERNAME != "tahoelafs" ]]; then if [ -d $SERVER_DIRECTORY/backup/spamassassin/$USERNAME ]; then if [ ! -d /home/$USERNAME ]; then ${PROJECT_NAME}-adduser $USERNAME fi echo $"Restoring spamassassin settings for $USERNAME" temp_restore_dir=/root/tempspamassassin restore_directory_from_friend $temp_restore_dir spamassassin/$USERNAME cp -rf $temp_restore_dir/home/$USERNAME/.spamassassin /home/$USERNAME/ if [ ! "$?" = "0" ]; then rm -rf $temp_restore_dir exit 276 fi rm -rf $temp_restore_dir fi fi done } function restore_admin_readme { if [[ $RESTORE_APP != 'all' ]]; then if [[ $RESTORE_APP != 'readme' ]]; then return fi fi if [ -d $SERVER_DIRECTORY/backup/readme ]; then echo $"Restoring README" temp_restore_dir=/root/tempreadme restore_directory_from_friend $temp_restore_dir readme cp -f $temp_restore_dir/home/$ADMIN_USERNAME/tempbackup/README /home/$ADMIN_USERNAME/ if [ ! "$?" = "0" ]; then rm -rf $temp_restore_dir exit 276 fi rm -rf $temp_restore_dir fi } function restore_ssh_keys { if [[ $RESTORE_APP != 'all' ]]; then if [[ $RESTORE_APP != 'ssh' ]]; then return fi fi for d in $SERVER_DIRECTORY/backup/ssh/*/ ; do USERNAME=$(echo "$d" | awk -F '/' '{print $6}') if [[ $USERNAME != "git" && $USERNAME != "mirrors" && $USERNAME != "sync" && $USERNAME != "tahoelafs" ]]; then if [ -d $SERVER_DIRECTORY/backup/ssh/$USERNAME ]; then if [ ! -d /home/$USERNAME ]; then ${PROJECT_NAME}-adduser $USERNAME fi echo $"Restoring ssh keys for $USERNAME" temp_restore_dir=/root/tempssh restore_directory_from_friend $temp_restore_dir ssh/$USERNAME cp -r $temp_restore_dir/home/$USERNAME/.ssh /home/$USERNAME/ if [ ! "$?" = "0" ]; then rm -rf $temp_restore_dir exit 664 fi rm -rf $temp_restore_dir fi fi done } function restore_user_config { if [[ $RESTORE_APP != 'all' ]]; then if [[ $RESTORE_APP != 'userconfig' ]]; then return fi fi for d in $SERVER_DIRECTORY/backup/config/*/ ; do USERNAME=$(echo "$d" | awk -F '/' '{print $6}') if [[ $USERNAME != "git" && $USERNAME != "mirrors" && $USERNAME != "sync" && $USERNAME != "tahoelafs" ]]; then if [ -d $SERVER_DIRECTORY/backup/config/$USERNAME ]; then if [ ! -d /home/$USERNAME ]; then ${PROJECT_NAME}-adduser $USERNAME fi echo $"Restoring config files for $USERNAME" temp_restore_dir=/root/tempconfig restore_directory_from_friend $temp_restore_dir config/$USERNAME cp -r $temp_restore_dir/home/$USERNAME/.config /home/$USERNAME/ if [ ! "$?" = "0" ]; then rm -rf $temp_restore_dir exit 664 fi rm -rf $temp_restore_dir fi fi done } function gpg_pubkey_from_email { key_owner_username=$1 key_email_address=$2 key_id= if [[ $key_owner_username != "root" ]]; then key_id=$(su -c "gpg --list-keys $key_email_address | grep 'pub '" - $key_owner_username | awk -F ' ' '{print $2}' | awk -F '/' '{print $2}') else key_id=$(gpg --list-keys $key_email_address | grep 'pub ' | awk -F ' ' '{print $2}' | awk -F '/' '{print $2}') fi echo $key_id } function restore_user_monkeysphere { if [[ $RESTORE_APP != 'all' ]]; then if [[ $RESTORE_APP != 'usermonkeysphere' ]]; then return fi fi for d in $SERVER_DIRECTORY/backup/monkeysphere/*/ ; do USERNAME=$(echo "$d" | awk -F '/' '{print $6}') if [[ $USERNAME != "git" && $USERNAME != "mirrors" && $USERNAME != "sync" && $USERNAME != "tahoelafs" ]]; then if [ -d $SERVER_DIRECTORY/backup/monkeysphere/$USERNAME ]; then if [ ! -d /home/$USERNAME ]; then ${PROJECT_NAME}-adduser $USERNAME fi echo $"Restoring monkeysphere ids for $USERNAME" temp_restore_dir=/root/tempmonkeysphere restore_directory_from_friend $temp_restore_dir monkeysphere/$USERNAME cp -r $temp_restore_dir/home/$USERNAME/.monkeysphere /home/$USERNAME/ if [ ! "$?" = "0" ]; then rm -rf $temp_restore_dir exit 664 fi rm -rf $temp_restore_dir fi fi # The admin user is the identity certifier MY_EMAIL_ADDRESS="${ADMIN_USERNAME}@${HOSTNAME}" if grep -q "MY_EMAIL_ADDRESS" $CONFIG_FILE; then MY_EMAIL_ADDRESS=$(grep "MY_EMAIL_ADDRESS" $CONFIG_FILE | awk -F '=' '{print $2}') fi MY_GPG_PUBLIC_KEY_ID=$(gpg_pubkey_from_email "$ADMIN_USERNAME" "$MY_EMAIL_ADDRESS") fpr=$(gpg --with-colons --fingerprint $MY_GPG_PUBLIC_KEY_ID | grep fpr | head -n 1 | awk -F ':' '{print $10}') monkeysphere-authentication add-identity-certifier $fpr monkeysphere-authentication update-users done } function restore_user_fin { if [[ $RESTORE_APP != 'all' ]]; then if [[ $RESTORE_APP != 'userfin' ]]; then return fi fi for d in $SERVER_DIRECTORY/backup/fin/*/ ; do USERNAME=$(echo "$d" | awk -F '/' '{print $6}') if [[ $USERNAME != "git" && $USERNAME != "mirrors" && $USERNAME != "sync" && $USERNAME != "tahoelafs" ]]; then if [ -d $SERVER_DIRECTORY/backup/fin/$USERNAME ]; then if [ ! -d /home/$USERNAME ]; then ${PROJECT_NAME}-adduser $USERNAME fi echo $"Restoring fin files for $USERNAME" temp_restore_dir=/root/tempfin restore_directory_from_friend $temp_restore_dir fin/$USERNAME cp -r $temp_restore_dir/home/$USERNAME/.fin /home/$USERNAME/ if [ ! "$?" = "0" ]; then rm -rf $temp_restore_dir exit 664 fi rm -rf $temp_restore_dir fi fi done } function restore_user_local { if [[ $RESTORE_APP != 'all' ]]; then if [[ $RESTORE_APP != 'userlocal' ]]; then return fi fi for d in $SERVER_DIRECTORY/backup/local/*/ ; do USERNAME=$(echo "$d" | awk -F '/' '{print $6}') if [[ $USERNAME != "git" && $USERNAME != "mirrors" && $USERNAME != "sync" && $USERNAME != "tahoelafs" ]]; then if [ -d $SERVER_DIRECTORY/backup/local/$USERNAME ]; then if [ ! -d /home/$USERNAME ]; then ${PROJECT_NAME}-adduser $USERNAME fi echo $"Restoring local files for $USERNAME" temp_restore_dir=/root/templocal restore_directory_from_friend $temp_restore_dir local/$USERNAME cp -r $temp_restore_dir/home/$USERNAME/.local /home/$USERNAME/ if [ ! "$?" = "0" ]; then rm -rf $temp_restore_dir exit 664 fi rm -rf $temp_restore_dir fi fi done } function restore_certs { if [[ $RESTORE_APP != 'all' ]]; then if [[ $RESTORE_APP != 'certs' ]]; then return fi fi if [ -d $SERVER_DIRECTORY/backup/ssl ]; then echo $"Restoring certificates" restore_directory_from_friend /root/tempssl ssl cp -r /root/tempssl/etc/ssl/* /etc/ssl if [ ! "$?" = "0" ]; then exit 276 fi rm -rf /root/tempssl # restore ownership if [ -f /etc/ssl/private/xmpp.key ]; then chown prosody:prosody /etc/ssl/private/xmpp.key chown prosody:prosody /etc/ssl/certs/xmpp.* fi if [ -d /etc/dovecot ]; then chown root:dovecot /etc/ssl/private/dovecot.* chown root:dovecot /etc/ssl/certs/dovecot.* fi if [ -f /etc/ssl/private/exim.key ]; then cp /etc/ssl/private/exim.key /etc/exim4 cp /etc/ssl/certs/exim.crt /etc/exim4 cp /etc/ssl/certs/exim.dhparam /etc/exim4 chown root:Debian-exim /etc/exim4/exim.key /etc/exim4/exim.crt /etc/exim4/exim.dhparam chmod 640 /etc/exim4/exim.key /etc/exim4/exim.crt /etc/exim4/exim.dhparam fi if [ -f /etc/ssl/private/mumble.key ]; then if [ -d /var/lib/mumble-server ]; then cp /etc/ssl/certs/mumble.* /var/lib/mumble-server cp /etc/ssl/private/mumble.key /var/lib/mumble-server chown -R mumble-server:mumble-server /var/lib/mumble-server fi fi fi } function restore_personal_settings { if [[ $RESTORE_APP != 'all' ]]; then if [[ $RESTORE_APP != 'personal' ]]; then return fi fi for d in $SERVER_DIRECTORY/backup/personal/*/ ; do USERNAME=$(echo "$d" | awk -F '/' '{print $6}') if [[ $USERNAME != "git" && $USERNAME != "mirrors" && $USERNAME != "sync" && $USERNAME != "tahoelafs" ]]; then if [ -d $SERVER_DIRECTORY/backup/personal/$USERNAME ]; then if [ ! -d /home/$USERNAME ]; then ${PROJECT_NAME}-adduser $USERNAME fi echo $"Restoring personal settings for $USERNAME" temp_restore_dir=/root/temppersonal restore_directory_from_friend $temp_restore_dir personal/$USERNAME if [ -d /home/$USERNAME/personal ]; then rm -rf /home/$USERNAME/personal fi mv $temp_restore_dir/home/$USERNAME/personal /home/$USERNAME if [ ! "$?" = "0" ]; then exit 184 fi rm -rf $temp_restore_dir fi fi done } function restore_mailing_list { if [[ $RESTORE_APP != 'all' ]]; then if [[ $RESTORE_APP != 'mailinglist' ]]; then return fi fi if [ -d /var/spool/mlmmj ]; then echo $"Restoring public mailing list" temp_restore_dir=/root/tempmailinglist restore_directory_from_friend $temp_restore_dir mailinglist cp -r $temp_restore_dir/root/spool/mlmmj/* /var/spool/mlmmj if [ ! "$?" = "0" ]; then exit 526 fi rm -rf $temp_restore_dir fi } function restore_email { if [[ $RESTORE_APP != 'all' ]]; then if [[ $RESTORE_APP != 'email' ]]; then return fi fi for d in $SERVER_DIRECTORY/backup/mail/*/ ; do USERNAME=$(echo "$d" | awk -F '/' '{print $6}') if [[ $USERNAME != "git" && $USERNAME != "mirrors" && $USERNAME != "sync" && $USERNAME != "tahoelafs" ]]; then if [ -d $SERVER_DIRECTORY/backup/mail/$USERNAME ]; then if [ ! -d /home/$USERNAME ]; then ${PROJECT_NAME}-adduser $USERNAME fi echo $"Restoring emails for $USERNAME" temp_restore_dir=/root/tempmail restore_directory_from_friend $temp_restore_dir mail/$USERNAME if [ ! -d /home/$USERNAME/Maildir ]; then mkdir /home/$USERNAME/Maildir fi tar -xzvf $temp_restore_dir/root/tempbackupemail/$USERNAME/maildir.tar.gz -C / if [ ! "$?" = "0" ]; then exit 927 fi rm -rf $temp_restore_dir fi fi done } # Social key management # Recover any key fragments and reconstruct the gpg key ${PROJECT_NAME}-recoverkey -u ${ADMIN_USERNAME} -l $BACKUP_LIST copy_gpg_keys restore_configuration restore_mariadb restore_letsencrypt restore_mutt_settings restore_gpg restore_procmail restore_spamassassin restore_admin_readme restore_ssh_keys restore_user_config restore_user_monkeysphere restore_user_fin restore_user_local restore_certs restore_personal_settings restore_mailing_list restore_email restore_apps remote set_user_permissions # ensure that all TLS certificates are pinned #${PROJECT_NAME}-pin-cert all echo $"*** Remote restore was successful ***" exit 0