post_install() {
  groupadd -r tss

  useradd -r -g tss -d /var/lib/tpm -s /bin/false tss
  chown -R tss:tss /var/lib/tpm
  chown tss:tss /usr/bin/tcsd

  chown tss:tss /etc/tcsd.conf
  chmod 0600 /etc/tcsd.conf

  udevadm trigger --sysname-match="tpm[0-9]*"
}

post_upgrade() {
  post_install $1
}

pre_remove() {
  systemctl stop tcsd
  userdel tss
}