#!/bin/sh
# postrm script for milter-greylist
#
# see: dh_installdeb(1)

set -e

# summary of how this script can be called:
#        * <postrm> `remove'
#        * <postrm> `purge'
#        * <old-postrm> `upgrade' <new-version>
#        * <new-postrm> `failed-upgrade' <old-version>
#        * <new-postrm> `abort-install'
#        * <new-postrm> `abort-install' <old-version>
#        * <new-postrm> `abort-upgrade' <old-version>
#        * <disappearer's-postrm> `disappear' <overwriter>
#          <overwriter-version>
# for details, see http://www.debian.org/doc/debian-policy/ or
# the debian-policy package


case "$1" in
  purge|remove|abort-install|disappear)
    # find first and last SYSTEM_UID numbers
    for LINE in `grep SYSTEM_UID /etc/adduser.conf | grep -v "^#"`
    do
      case $LINE in
        FIRST_SYSTEM_UID*)
          FIRST_SYSTEM_UID=`echo $LINE | cut -f2 -d '='`
        ;;
        LAST_SYSTEM_UID*)
          LAST_SYSTEM_UID=`echo $LINE | cut -f2 -d '='`
        ;;
        *)
        ;;
      esac
    done
    # Remove system account if necessary
    CREATEDUSER="greylist"
    if [ -n "$FIRST_SYSTEM_UID" ] && [ -n "$LAST_SYSTEM_UID" ]
    then
      if USERID=`getent passwd $CREATEDUSER | cut -f 3 -d ':'`
      then
        if [ -n "$USERID" ]
        then
          if [ "$FIRST_SYSTEM_UID" -le "$USERID" ] && [ "$USERID" -le "$LAST_SYSTEM_UID" ]
	  then
            echo -n "Removing $CREATEDUSER system user.."
            deluser --quiet $CREATEDUSER || true
            echo "..done"
          fi
        fi
      fi
    fi
    # Remove system group if necessary
    CREATEDGROUP="greylist"
    FIRST_USER_GID=`grep ^USERS_GID /etc/adduser.conf | cut -f2 -d '='`
    if [ -n "$FIRST_USER_GID" ]
    then
      if GROUPGID=`getent group $CREATEDGROUP | cut -f 3 -d ':'`
      then
        if [ -n "$GROUPGID" ]
        then
          if [ "$FIRST_USER_GID" -gt "$GROUPGID" ]
	  then
            echo -n "Removing $CREATEDGROUP group.."
            delgroup --only-if-empty $CREATEDGROUP || true
            echo "..done"
          fi
        fi
      fi
    fi
  ;;

  upgrade|failed-upgrade|abort-upgrade)
  ;;

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

# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.

# Automatically added by dh_installinit/13.3.4ubuntu2
if [ "$1" = "purge" ] ; then
	update-rc.d milter-greylist remove >/dev/null
fi
# End automatically added section
# Automatically added by dh_installsystemd/13.3.4ubuntu2
if [ -d /run/systemd/system ] && [ "$1" = remove ]; then
	systemctl --system daemon-reload >/dev/null || true
fi
# End automatically added section
# Automatically added by dh_installsystemd/13.3.4ubuntu2
if [ "$1" = "remove" ]; then
	if [ -x "/usr/bin/deb-systemd-helper" ]; then
		deb-systemd-helper mask 'milter-greylist.service' >/dev/null || true
	fi
fi

if [ "$1" = "purge" ]; then
	if [ -x "/usr/bin/deb-systemd-helper" ]; then
		deb-systemd-helper purge 'milter-greylist.service' >/dev/null || true
		deb-systemd-helper unmask 'milter-greylist.service' >/dev/null || true
	fi
fi
# End automatically added section


exit 0