Use ERL_ERROR and ERL_WARNING git grep -li 'errlogPrintf.*[" ]error' | xargs sed -i -E -e 's|(errlogPrintf.*[" ])(error)|\1" ERL_ERROR "|g' git grep -li 'errlogPrintf.*[" ]warn' | xargs sed -i -E -e 's|(errlogPrintf.*[" ])(warn[a-zA-Z]*)|\1" ERL_WARNING "|g'