post_install() {
  getent group guam >/dev/null 2>&1 || groupadd guam &>/dev/null
  getent passwd guam >/dev/null 2>&1 || useradd -g guam -d /var/lib/guam -s /bin/false guam &>/dev/null
  chmod -R a+r+w /var/log/guam
  
  chown guam:guam /var/log/guam
}

post_upgrade() {
  post_install
}

post_remove() {
  if getent passwd guam >/dev/null 2>&1; then
	  userdel guam
  fi  
  if getent group guam >/dev/null 2>&1; then
	  groupdel guam
  fi  
}