I want the dhcpcd get IP, gate, dns, netmask and ... and JUST write it to /var/lib/dhcpcd/dhcpcd-xxx.info

I don't want it to change anything, I would like to do it bu myself.
I tried to find script dhcpcd.sh, but couldn't.

So, the question is - how to configure DHCPCD to do not change anything except dhcpcd-xxx.info?

Thank you.