#!/bin/sh
set -e

. /lib/lsb/init-functions
. /usr/share/debconf/confmodule

CONFFILE=/etc/default/portmap

create_config() {
        cat <<EOF > $CONFFILE
# Portmap configuration file
#
# Note: if you manually edit this configuration file,
# portmap configuration scripts will avoid modifying it
# (for example, by running 'dpkg-reconfigure portmap').

# If you want portmap to listen only to the loopback
# interface, uncomment the following line (it will be
# uncommented automatically if you configure this
# through debconf).
EOF
        # Allow the installation default to be preseeded
        db_get portmap/loopback
        if [ "true" = "$RET" ] ; then
                echo 'OPTIONS="-i 127.0.0.1"' >> $CONFFILE
        else
                echo 'OPTIONS=""' >> $CONFFILE
        fi
        chmod 0644 $CONFFILE
}

# On install only, create the config file if it does not exist
#
if [ ! -e $CONFFILE ] ; then
       if  [ -z "$version" ] ; then
               create_config
       elif [ -n "$version" ] && [ "$action" = "upgrade" ] && \
            dpkg --compare-versions "$version" lt 5-6; then
# or if upgrading from version older than 5-6 (which provided the file)
            create_config
       fi
fi

if [ "$1" = "configure" ] && [ -n "$2" ] &&
  dpkg --compare-versions "$2" le "6.0.0-1"; then
       err=$( update-rc.d -f portmap remove 2>&1 > /dev/null ) || {
               echo "$err" >&2
               exit 1
       }
fi

if [ "$1" = "configure" ] && [ -n "$2" ] && dpkg --compare-versions "$2" lt "5-7ubuntu2"; then
    db_set portmap/loopback true
fi

# be consistent with Debian
if [ -e "$CONFFILE" ]; then
	sed -i -e 's/ARGS/OPTIONS/g' "$CONFFILE"
else
	printf "# By default, listen only on the loopback interface\nOPTIONS=\"-i 127.0.0.1\"\n" > "$CONFFILE"
fi

# Keep track of changes to the portmapper
portmap_changed=0

if [ -e "$CONFFILE" ] && [ "$1" = "configure" ] || [ "$1" = "reconfigure" ] ; then

  # Read in the options
  . $CONFFILE || true

  if [ "$OPTIONS" = "-i 127.0.0.1" ] || [ -z "$OPTIONS" ] ; then
  # The configuration matches the changes we introduce, go ahead
  # and make the changes

      db_get portmap/loopback

      if [ "$RET" = true ]; then
	  # first we need to understand if there is OPTIONS somewhere
	  # and if not, add it with a sane default.
          if [ "$1" = "configure" ] && [ -n "$2" ] && ! grep -qs OPTIONS "$CONFFILE"; then
              echo "OPTIONS=\"-i 127.0.0.1\"" >> "$CONFFILE"
              portmap_changed=1
          fi
	  # if OPTION is not at the beginning, make it so
	  # XXX: only the last OPTIONS will be used, but we don't know
	  # if the user is chaining the values, so it seems to be reasonably safe.
          if ! grep -q ^OPTIONS "$CONFFILE" >/dev/null 2>&1; then
              sed -i -e 's/.*OPTIONS/OPTIONS/g' "$CONFFILE"
              portmap_changed=1
          fi
	  # source again the result
          . "$CONFFILE"
	  # check if loopback is not in the string
          if [ -z "$( echo $OPTIONS | grep "127.0.0.1" )" ]; then
              if [ -n "$OPTIONS" ]; then
                  OPTIONS="$OPTIONS -i 127.0.0.1"
              else
                  OPTIONS="-i 127.0.0.1"
              fi
              sed -i -e 's/OPTIONS.*/OPTIONS=\"'"$OPTIONS"'\"/g' "$CONFFILE"
              portmap_changed=1
          fi
      else
          if [ "$1" = "configure" ] && [ -n "$2" ] && ! grep -qs OPTIONS "$CONFFILE"; then
              echo "OPTIONS=\"\"" >> "$CONFFILE"
          fi
# Just reverse the change above in case a user wants to go from 'true'
# to 'false' at some point.
          OPTIONS="$( echo $OPTIONS | sed -e 's/-i 127.0.0.1//g' )"
          sed -i -e 's/^OPTIONS.*/OPTIONS=\"'"$OPTIONS"'\"/g' "$CONFFILE"
          portmap_changed=1
      fi

      
  else 
      echo "Portmap options have already been configured in $CONFFILE"
      echo "This script will not modify it, please edit this file manually."
  fi
fi 

if [ ! -e "$CONFFILE" ] && [ "$1" = "reconfigure" ] ; then
	echo "Cannot reconfigure portmap since $CONFFILE has been manually removed by the admin"
fi

db_stop

# End of configuration

# Automatically added by dh_installinit
if [ -x "/etc/init.d/portmap" ]; then
	update-rc.d portmap start 43 S 2 3 4 5 . start 32 0 6 . stop 81 1 . >/dev/null
	if [ -x "`which invoke-rc.d 2>/dev/null`" ]; then
		invoke-rc.d portmap start || exit $?
	else
		/etc/init.d/portmap start || exit $?
	fi
fi
# End automatically added section


# Warn if there are services linked with the portmapper
# but its configuration has changed. We will not automatically
# restart them, however.
if [ -n "$2" ] && [ "$portmap_changed" -eq 1 ] ; then
    pid=$( pidofproc -p /var/run/portmap.pid /sbin/portmap ) || true
    if [ -n "$pid" ] ; then
	# RPCinfo might fail if the portmapper is not running
	# (i.e. broken options...)
	set +e
	rpccount=$( rpcinfo -p 2>/dev/null | grep "tcp\|udp" | grep -v portmapper | wc -l )
	set -e
	if [ "0$rpccount" -gt 0 ] ; then
	# TODO: Turn this into a debconf note?
	# TODO: associate common RPC services with init.d lines?
	# i.e. : 
	#  sgi_fam -> /etc/init.d/fam
	#  status  -> /etc/init.d/nfs-common
		echo "There are RPC services which were registered with the portmapper"
		echo "before the configuration was changed."
		echo "You need to manually restart them in order for the changes to take effect."
		echo "Current registered services:"
		echo "------------------------------------------------"
		rpcinfo -p | grep "tcp\|udp" | grep -v portmapper 
		echo "------------------------------------------------"
	fi
    fi
fi


exit 0