post_install() {
    getent passwd otrs > /dev/null 2>&1 || useradd -r -M -N -g http -s /bin/bash -d /usr/share/webapps/otrs otrs > /dev/null 2>&1
    /usr/share/webapps/otrs/bin/otrs.SetPermissions.pl --otrs-user=otrs --web-group=http /usr/share/webapps/otrs > /dev/null 2>&1
    chmod 2775 /usr/share/webapps/otrs
}

post_remove() {
    getent passwd otrs > /dev/null 2>&1 && userdel -rf otrs > /dev/null 2>&1
}

pre_upgrade() {
    chown 0:0 -R /etc/webapps/otrs
    chown 0:0 -R /usr/share/webapps/otrs
}

post_upgrade() {
    /usr/share/webapps/otrs/bin/otrs.SetPermissions.pl --otrs-user=otrs --web-group=http /usr/share/webapps/otrs > /dev/null 2>&1
    chmod 2775 /usr/share/webapps/otrs
}