#!/bin/bash -e

. /usr/share/debconf/confmodule

if [ -n "$DEBIAN_SCRIPT_DEBUG" ]; then set -v -x; DEBIAN_SCRIPT_TRACE=1; fi
${DEBIAN_SCRIPT_TRACE:+ echo "#42#DEBUG# RUNNING $0 $*" 1>&2 }

export PATH=$PATH:/sbin:/usr/sbin:/bin:/usr/bin

# This command can be used as pipe to syslog. With "-s" it also logs to stderr.
ERR_LOGGER="logger -p daemon.err -t mysqld_safe -i"
# This will make an error in a logged command immediately apparent by aborting
# the install, rather than failing silently and leaving a broken install.
set -o pipefail

MYSQL_BOOTSTRAP="/usr/sbin/mysqld --bootstrap --user=mysql --disable-log-bin --skip-grant-tables --default-storage-engine=myisam"

case "$1" in
  configure)
    mysql_statedir=/usr/share/mysql
    mysql_datadir=/var/lib/mysql
    mysql_logdir=/var/log/mysql
    mysql_rundir=/var/run/mysqld
    mysql_cfgdir=/etc/mysql
    mysql_upgradedir=/var/lib/mysql-upgrade

    # If the following symlink exists, it is a preserved copy the old data dir
    # created by the preinst script during a upgrade that would have otherwise
    # been replaced by an empty mysql dir.  This should restore it.
    for dir in DATADIR LOGDIR; do

      if [ "$dir" = "DATADIR" ]; then
        targetdir=$mysql_datadir
      else
        targetdir=$mysql_logdir
      fi

      savelink="$mysql_upgradedir/$dir.link"
      if [ -L "$savelink" ]; then
        # If the targetdir was a symlink before we upgraded it is supposed
        # to be either still be present or not existing anymore now.
        if [ -L "$targetdir" ]; then
          rm "$savelink"
        elif [ ! -d "$targetdir" ]; then
          mv "$savelink" "$targetdir"
        else
          # this should never even happen, but just in case...
          mysql_tmp=`mktemp -d -t mysql-symlink-restore-XXXXXX`
          echo "this is very strange!  see $mysql_tmp/README..." >&2
          mv "$targetdir" "$mysql_tmp"
          cat << EOF > "$mysql_tmp/README"

If you're reading this, it's most likely because you had replaced /var/lib/mysql
with a symlink, then upgraded to a new version of mysql, and then dpkg
removed your symlink (see #182747 and others). The mysql packages noticed
that this happened, and as a workaround have restored it. However, because
/var/lib/mysql seems to have been re-created in the meantime, and because
we don't want to rm -rf something we don't know as much about, we are going
to leave this unexpected directory here. If your database looks normal,
and this is not a symlink to your database, you should be able to blow
this all away.

EOF
        fi
      fi
	    rmdir $mysql_upgradedir 2>/dev/null || true

    done

    # Ensure the existence and right permissions for the database and
    # log files.
    if [ ! -d "$mysql_statedir" -a ! -L "$mysql_statedir" ]; then mkdir "$mysql_statedir"; fi
    if [ ! -d "$mysql_datadir"  -a ! -L "$mysql_datadir" ]; then mkdir "$mysql_datadir" ; fi
    if [ ! -d "$mysql_logdir"   -a ! -L "$mysql_logdir"  ]; then mkdir "$mysql_logdir"  ; fi
    # When creating an ext3 jounal on an already mounted filesystem like e.g.
    # /var/lib/mysql, you get a .journal file that is not modifyable by chown.
    # The mysql_statedir must not be writable by the mysql user under any
    # circumstances as it contains scripts that are executed by root.
    set +e
    chown -R 0:0 $mysql_statedir
    find $mysql_datadir ! -uid $(id -u mysql) -print0 | xargs -0 -r chown mysql
    chown -R mysql:adm $mysql_logdir
    chmod 2750 $mysql_logdir
    set -e

    # This is important to avoid dataloss when there is a removed
    # mysql-server version from Woody lying around which used the same
    # data directory and then somewhen gets purged by the admin.
    db_set mariadb-server/postrm_remove_database false || true

    # Clean up old flags before setting new one
    rm -f $mysql_datadir/debian-*.flag
    # Flag data dir to avoid downgrades
    touch $mysql_datadir/debian-10.1.flag

    # initiate databases. Output is not allowed by debconf :-(
    # This will fail if we are upgrading an existing database; in this case
    # mysql_upgrade, called from the /etc/init.d/mysql start script, will
    # handle things.
    # Debian: beware of the bashisms...
    # Debian: can safely run on upgrades with existing databases
    set +e
    bash /usr/bin/mysql_install_db --skip-auth-anonymous-user --auth-root-authentication-method=socket --rpm --cross-bootstrap --user=mysql --disable-log-bin 2>&1 | $ERR_LOGGER
    set -e


    # Create the credentials file if not present. On all new installs the
    # root account can be used directly for maintenance authenticated by
    # unix socket and on new installs there is no need to define a
    # separate Debian maintenance user account.
    dc=$mysql_cfgdir/debian.cnf;
    if [ ! -d "$mysql_cfgdir" ]; then
      install -o 0 -g 0 -m 0755 -d $mysql_cfgdir
    fi
    if [ ! -e "$dc" ]; then
      umask 066
      cat /dev/null > $dc
      umask 022
      echo "# Automatically generated for Debian scripts. DO NOT TOUCH!" >>$dc
      echo "[client]"                                                    >>$dc
      echo "host     = localhost"                                        >>$dc
      echo "user     = root"                                             >>$dc
      echo "password = "                                                 >>$dc
      echo "socket   = $mysql_rundir/mysqld.sock"                        >>$dc
      echo "[mysql_upgrade]"                                             >>$dc
      echo "host     = localhost"                                        >>$dc
      echo "user     = root"                                             >>$dc
      echo "password = "                                                 >>$dc
      echo "socket   = $mysql_rundir/mysqld.sock"                        >>$dc
      echo "basedir  = /usr"                                             >>$dc
    fi
    # If this dir chmod go+w then the admin did it. But this file should not.
    chown 0:0 $dc
    chmod 0600 $dc

    # Update privilege tables
    password_column_fix_query=`/bin/echo -e \
      "USE mysql;\n" \
      "SET sql_log_bin=0;\n" \
      "ALTER TABLE user CHANGE Password Password char(41) character set latin1 collate latin1_bin DEFAULT '' NOT NULL;"`

    # Upgrade password column format.
    # NOTE: $MYSQL_BOOTSTRAP requires one SQL statement per line, semicolon at the end.
    echo "$password_column_fix_query" | $MYSQL_BOOTSTRAP 2>&1 | $ERR_LOGGER

  ;;

  abort-upgrade|abort-remove|abort-configure)
  ;;

  *)
    echo "postinst called with unknown argument '$1'" 1>&2
    exit 1
  ;;
esac

db_stop # in case invoke failes

# dh_systemd_start doesn't emit anything since we still ship /etc/init.d/mysql.
# Thus MariaDB server is started via init.d script, which in turn redirects to
# systemctl. If we upgrade from MySQL mysql.service may be masked, which also
# means init.d script is disabled. Unmask mysql service explicitly.
# Check first that the command exists, to avoid emitting any warning messages.
if [ -x "$(command -v deb-systemd-helper)" ]; then
  deb-systemd-helper unmask mysql.service > /dev/null
fi

# Automatically added by dh_systemd_enable
# This will only remove masks created by d-s-h on package removal.
deb-systemd-helper unmask mariadb.service >/dev/null || true

# was-enabled defaults to true, so new installations run enable.
if deb-systemd-helper --quiet was-enabled mariadb.service; then
	# Enables the unit on first installation, creates new
	# symlinks on upgrades if the unit file has changed.
	deb-systemd-helper enable mariadb.service >/dev/null || true
else
	# Update the statefile to add new symlinks (if any), which need to be
	# cleaned up on purge. Also remove old symlinks.
	deb-systemd-helper update-state mariadb.service >/dev/null || true
fi
# End automatically added section
# Automatically added by dh_systemd_enable
if deb-systemd-helper debian-installed mariadb.service; then
	# This will only remove masks created by d-s-h on package removal.
	deb-systemd-helper unmask mariadb.service >/dev/null || true

	if deb-systemd-helper --quiet was-enabled mariadb.service; then
		# Create new symlinks, if any.
		deb-systemd-helper enable mariadb.service >/dev/null || true
	fi
fi

# Update the statefile to add new symlinks (if any), which need to be cleaned
# up on purge. Also remove old symlinks.
deb-systemd-helper update-state mariadb.service >/dev/null || true
# End automatically added section
# Automatically added by dh_installinit
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ]; then
	if [ -x "/etc/init.d/mysql" ]; then
		update-rc.d mysql defaults 19 21 >/dev/null || exit $?
	fi
fi
# End automatically added section


# Modified dh_systemd_start snippet that's not added automatically due /etc/init.d/mysql
if [ -d /run/systemd/system ]; then
	systemctl --system daemon-reload >/dev/null || true
	deb-systemd-invoke start mariadb.service >/dev/null || true
# Modified dh_installinit snippet to only run with sysvinit
elif [ -x "/etc/init.d/mysql" ]; then
	if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ]; then
		invoke-rc.d mysql start || exit $?
	fi
fi

exit 0