relocate dnsmasq --conf-dir location?

[<mailinglist bentleyemail net>]

Our embedded device has a readonly partition for configuration and such.  /etc/ is on this readonly partition.

We currently use keyfile path=/writable partition in order to get system-connections off the readonly partition.  Is there a way to get the dnsmasq --conf-dir parameter to point to a different location as well?

Currently I see:

# ps | grep dns
340 nobody /usr/sbin/dnsmasq --conf-file=/dev/null --no-hosts --keep-in-foreground --bind-interfaces --except-interface=lo --clear-on-reload --strict-order --listen-address=172.16.54.100 --dhcp-range=172.16.54.109,172.16.54.254,60m --dhcp-lease-max=50 --dhcp-leasefile=/var/lib/NetworkManager/dnsmasq-br0.leases --pid-file=/var/run/nm-dnsmasq-br0.pid --conf-dir=/etc/NetworkManager/dnsmasq-shared.d
345 nobody /usr/sbin/dnsmasq --no-resolv --keep-in-foreground --no-hosts --bind-interfaces --pid-file=/var/run/NetworkManager/dnsmasq.pid --listen-address=127.0.0.1 --cache-size=400 --clear-on-reload --conf-file=/dev/null --proxy-dnssec --enable-dbus=org.freedesktop.NetworkManager.dnsmasq --conf-dir=/etc/NetworkManager/dnsmasq.d

I have not seen where I can influence this location.  Can you advise?  I'd like to be able to have something like:

/usr/sbin/dnsmasq --conf-file=/dev/null --no-hosts --keep-in-foreground --bind-interfaces --except-interface=lo --clear-on-reload --strict-order --listen-address=172.16.54.100 --dhcp-range=172.16.54.109,172.16.54.254,60m --dhcp-lease-max=50 --dhcp-leasefile=/var/lib/NetworkManager/dnsmasq-br0.leases --pid-file=/var/run/nm-dnsmasq-br0.pid --conf-dir=/modifiable/NetworkManager/dnsmasq-shared.d
/usr/sbin/dnsmasq --no-resolv --keep-in-foreground --no-hosts --bind-interfaces --pid-file=/var/run/NetworkManager/dnsmasq.pid --listen-address=127.0.0.1 --cache-size=400 --clear-on-reload --conf-file=/dev/null --proxy-dnssec --enable-dbus=org.freedesktop.NetworkManager.dnsmasq --conf-dir=/modifiable/NetworkManager/dnsmasq.d

Thanks,

-Eric