post_install() {
  echo -n "adding dspam system group... "
  groupadd -r dspam && echo "done."
  echo -n "adding dspam system user... "
  useradd -r -c "DSPAM Daemon" -d /var/lib/dspam -g dspam -s /bin/false dspam \
    && echo "done."
  passwd -l dspam &>/dev/null
  chown root:dspam usr/bin/dspam{,c}
  chown -R root:dspam etc/dspam
  chmod g+rs usr/bin/dspam{,c}

cat << EOF
>>> To populate the DSPAM database, you need to follow several steps.
>>> First create a database. Login to the mysql command prompt.
    $ mysql -u root -p
    mysql> CREATE database dspam;
>>> Next, you need to create a dspam user. At the same MySQL prompt:
    mysql> GRANT ALL PRIVILEGES ON dspam.* TO dspam@'localhost' IDENTIFIED BY 'passwd';
>>> Replacing passwd with your chosen password.
>>> Create dspam database:
    $ mysql -u dspam dspam -p < /usr/share/dspam/mysql/mysql_objects-4.1.sql
>>> Create virtual user table:
    $ mysql -u dspam dspam -p < /usr/share/dspam/mysql/virtual_users.sql
>>> Enter the password you set in the previous step, and the database should be populated.

>>> Remember to edit /etc/dspam/dspam.conf accordingly
>>> If you want to use the postgresql, sqlite3 or Berekely DB4 backends,
>>> read the documentation
>>>
EOF
}

post_upgrade() {
  chown root:dspam usr/bin/dspam{,c}
  chown -R root:dspam etc/dspam
  chown dspam:dspam var/l{og,ib}/dspam
  chmod g+s usr/bin/dspamc
}