#!/bin/sh

set -e

RUNAS=qpsmtpd
SPOOLDIR=/var/spool/qpsmtpd
GREYLISTDIR=/var/lib/qpsmtpd/greylisting
LOGDIR=/var/log/qpsmtpd
PIDDIR=/var/run/qpsmtpd

if [ -e /etc/qpsmtpd/debconf-settings ] ; then
	. /etc/qpsmtpd/debconf-settings
fi

if [ -e /usr/share/debconf/confmodule ] ; then
	. /usr/share/debconf/confmodule
fi

setup_debconf()
{
	# extract the configuration from debconf and write it where qpsmtpd
	# can find it, now that the destination exists

	db_get qpsmtpd/startup_enabled
	ENABLED="$RET"

	db_get qpsmtpd/server_type
	SERVER="$RET"

	db_get qpsmtpd/listen_interfaces
	INTERFACES="$RET"

	db_get qpsmtpd/queue_plugin
	QUEUE_PLUGIN="$RET"

	db_get qpsmtpd/queue_maildir_destination
	QUEUE_MAILDIR_DESTINATION="$RET"

	db_get qpsmtpd/queue_smtp_proxy_destination
	QUEUE_PROXY_DESTINATION="$RET"

	db_get qpsmtpd/rcpthosts
	RCPTHOSTS="$RET"

	TMP=`mktemp /etc/qpsmtpd/.tmp.debconf-settings.$$.XXXXXX`
	( echo "# auto-generated by $0 at `date`" ; cat <<"EOT"
# 
# This is a copy of the qpsmtpd debconf settings for use at startup time.
# Please don't edit it directly -- if you need to change any of these
# settings, run 'dpkg-reconfigure qpsmtpd'.
EOT
	  echo "ENABLED=\"$ENABLED\""
	  echo "SERVER=\"$SERVER\""
	  echo "INTERFACES=\"$INTERFACES\""
	  echo "QUEUE_PLUGIN=\"$QUEUE_PLUGIN\""
	  echo "QUEUE_MAILDIR_DESTINATION=\"$QUEUE_MAILDIR_DESTINATION\""
	  echo "QUEUE_PROXY_DESTINATION=\"$QUEUE_PROXY_DESTINATION\""
	) > "$TMP"

	mv -f "$TMP" "/etc/qpsmtpd/debconf-settings" || ( rm -f "$TMP" && false )
	chmod 0644 "/etc/qpsmtpd/debconf-settings"

	TMP=`mktemp /etc/qpsmtpd/.tmp.debconf-queue-select.$$.XXXXXX`
	( echo "# auto-generated by $0 at `date`" ; cat <<"EOT"
#
# This is the qpsmtpd queue plugin selection generated by debconf at
# package installation.  It reflects the choice of queue method selected
# by the debconf UI.  Please do not edit it directly -- it will be overwritten
# on subsequent package upgrades.  To change the queueing/delivery 
# method, either run 'dpkg-reconfigure qpsmtpd' and pick a different method,
# or edit /etc/qpsmtpd/plugins to remove the $include reference to this file,
# then pick whatever queue plugin you prefer.
EOT
	if [ "$QUEUE_PLUGIN" = "exim" ] ; then
		echo "queue/exim-bsmtp"
	elif [ "$QUEUE_PLUGIN" = "postfix" ] ; then
		echo "queue/postfix-queue"
	elif [ "$QUEUE_PLUGIN" = "proxy" ] ; then
		echo -n "queue/smtp-forward "
		echo "$QUEUE_PROXY_DESTINATION" | tr ":" " "
	elif [ "$QUEUE_PLUGIN" = "qmail" ] ; then
		echo "queue/qmail-queue /usr/sbin/qmail-queue"
	elif [ "$QUEUE_PLUGIN" = "maildir" ] ; then
		echo "queue/maildir $QUEUE_MAILDIR_DESTINATION"
	fi
	echo
	) > "$TMP"
	mv -f "$TMP" "/etc/qpsmtpd/debian-queue-method"
	chmod 0644 "/etc/qpsmtpd/debian-queue-method"

	TMP=`mktemp /etc/qpsmtpd/.tmp.debconf-rcpthosts.$$.XXXXXX`
	( echo "# auto-generated by $0 at `date`" ; cat <<"EOT"
#
# This is the Debian-specific qpsmtpd rcpthosts setting, containing the list of
# host and domain names for which qpsmtpd will accept mail.  It should include
# all locally-delivered domain names as well as those for which you wish to
# relay mail.  This file was generated by debconf when qpsmtpd was installed or
# (re)configured.  To alter it, please run 'dpkg-reconfigure qpsmtpd'.  If you
# prefer to edit the rcpthosts list manually, edit /etc/qpstmpd/rcpthosts and
# remove the $include reference to this file.
EOT
	echo "$RCPTHOSTS" | perl -pe 's/[\s,]+/\n/g'
	) > "$TMP"
	mv -f "$TMP" "/etc/qpsmtpd/debian-rcpthosts"
	chmod 0644 "/etc/qpsmtpd/debian-rcpthosts"
}

setup_user()
{
if ( ! getent passwd "$RUNAS" > /dev/null ) ; then
	adduser --quiet \
		--system --home "$SPOOLDIR" \
		--gecos "qpsmtpd daemon user" \
		--group "$RUNAS"
fi
if [ "x$QUEUE_PLUGIN" = "xpostfix" ] ; then
	if ( ! getent group "postdrop" | \
	       tr ":" "\n" | \
	       grep -q "^$RUNAS\$" ) ; then
		adduser --quiet "$RUNAS" "postdrop"
	fi
fi
}

setup_perms()
{
	if ( ! dpkg-statoverride --list "$SPOOLDIR" > /dev/null ) ; then
		dpkg-statoverride --update --add "$RUNAS" "$RUNAS" 2700 "$SPOOLDIR"
	fi
	if ( ! dpkg-statoverride --list "$GREYLISTDIR" > /dev/null ) ; then
		dpkg-statoverride --update --add "$RUNAS" "$RUNAS" 2700 "$GREYLISTDIR"
	fi
	if ( ! dpkg-statoverride --list "$LOGDIR" > /dev/null ) ; then
		dpkg-statoverride --update --add "$RUNAS" adm 2750 "$LOGDIR"
	fi
	if ( ! dpkg-statoverride --list "$PIDDIR" > /dev/null ) ; then
		dpkg-statoverride --update --add "$RUNAS" adm 2755 "$PIDDIR"
	fi
}

setup_maildir_spool()
{
	if [ "x$QUEUE_PLUGIN" = "xmaildir" -a \
	     "x$QUEUE_MAILDIR_DESTINATION" != "x" ] ; then
		if [ ! -d "$QUEUE_MAILDIR_DESTINATION" ] ; then
			[ -d "`dirname "$QUEUE_MAILDIR_DESTINATION"`" ] || \
				mkdir -m 0755 -p "`dirname "$QUEUE_MAILDIR_DESTINATION"`"
			[ -d "$QUEUE_MAILDIR_DESTINATION" ] || \
				mkdir -m 0700 -p "$QUEUE_MAILDIR_DESTINATION"
			for d in "$QUEUE_MAILDIR_DESTINATION/new" \
					 "$QUEUE_MAILDIR_DESTINATION/cur" \
					 "$QUEUE_MAILDIR_DESTINATION/tmp" ; do
				if [ ! -d "$d" ] ; then
					mkdir -m 0700 "$d"
				fi
			done
			chown -R $RUNAS "$QUEUE_MAILDIR_DESTINATION"
		fi
	fi
}

upgrade_config()
{
  from_version="$1" ; shift
  if dpkg --compare-versions "$from_version" lt 0.32 ; then
    if [ -f /var/log/qpsmtpd/qpsmtpd.log ] ; then
      chown qpsmtpd /var/log/qpsmtpd/qpsmtpd.log
    fi
  fi
  if dpkg --compare-versions "$from_version" le 0.94-1 ; then
    # "check_" prefix was removed in upstream change
    # b1c2fa16b5fda84f361abf15764501fd11e84022
    db_input high qpsmtpd/pre094_checkplugin_warning || true
    db_go
  fi
}

case "$1" in
	configure)
        previous="$2"
		setup_debconf
		setup_user
		setup_perms
		setup_maildir_spool
        upgrade_config "$previous"
		;;
	abort-upgrade|abort-remove|abort-deconfigure)
		# no-op
		;;
	*)
		echo "Unrecognized postinst argument '$1'"
		;;

esac

# Automatically added by dh_installinit/13.11.4
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
	if [ -z "${DPKG_ROOT:-}" ] && [ -x "/etc/init.d/qpsmtpd" ]; then
		update-rc.d qpsmtpd defaults >/dev/null
		if [ -n "$2" ]; then
			_dh_action=restart
		else
			_dh_action=start
		fi
		invoke-rc.d qpsmtpd $_dh_action || exit 1
	fi
fi
# End automatically added section


db_stop

exit 0