_svc="firewalld" _rlvl="default" post_install() { _cmd="rc-update add ${_svc} ${_rlvl}" echo " ==> run '${_cmd}'" } post_upgrade() { post_install "$1" } post_remove() { _cmd="rc-update del ${_svc} ${_rlvl}" echo " ==> run '${_cmd}'" }