This executable can run non-interactive system commands.
This function can be performed by any unprivileged user.
dnsmasq --conf-script='/path/to/command 1>&2'
This function is performed by the privileged user if executed via sudo because the acquired privileges are not dropped.
dnsmasq --conf-script='/path/to/command 1>&2'
This function is performed by the privileged user if the executable has the SUID bit set and the right ownership because the effective privileges are not dropped.
dnsmasq --conf-script='/path/to/command 1>&2'