post_install() {
    # create tenshi user
    if [ -z "`grep '^tenshi:' /etc/group`" ]; then
        groupadd tenshi
    fi
    if [ -z "`grep '^tenshi:' /etc/passwd`" ]; then
        useradd -d /var/lib/tenshi -g tenshi -s /bin/false tenshi
    else
        usermod -s /bin/false tenshi
    fi

    # set more secure permissions on config files, etc
    chown -R tenshi:tenshi /etc/tenshi
    chown -R tenshi:tenshi /var/lib/tenshi
}

post_upgrade() {
    post_install $1
}

