[Dnsmasq-discuss] Help: Changes when service dnsmasq start is executed

[Rahul Jain]

Hi all,

I want to know about all the changes(internally as in files etc) when "service dnsmasq start" is executed. I noticed one change that it edits the /etc/resolv.conf. The reason is when I set the add-mac option in /etc/dnsmasq.conf and start the dnsmasq service, I'm able to get the EDNS0 option in a dns query but when I compiled from the source and ran it, the same thing doesn't happen.


Thanks & Regards,

Rahul Jain

[Albert ARIBAUD]

Hi Rahul,

Le Mon, 21 Nov 2016 13:43:24 +0000

Post by Rahul Jain
Hi all,
I want to know about all the changes(internally as in files etc)
when "service dnsmasq start" is executed. I noticed one change that
it edits the /etc/resolv.conf. The reason is when I set the add-mac
option in /etc/dnsmasq.conf and start the dnsmasq service, I'm able
to get the EDNS0 option in a dns query but when I compiled from the
source and ran it, the same thing doesn't happen.

I believe you are mistaking two things here: the dnsmasq executable on
the one hand, and the operating system use of dnsmasq on the other hand.

The dnsmasq project only provides the dnsmasq executable. It does not
provide the scripts that the "service dnsmasq start" or "service
dnsmasq stop" commands will run.

These scripts are part of the operating system, and may actually vary
from distribution to distribution.

For instance, dnsmasq *never* edits the /etc/resolv.conf file -- this
is a system change which only the system can perform in a consistent
way.

To understand what "service dnsmasq *" does on your system, you should
refer to the documentation of the distribution you are using.

Post by Rahul Jain
Thanks & Regards,
Rahul Jain

Amicalement,

[/dev/rob0]

Post by Rahul Jain
I want to know about all the changes(internally as in files etc)
when "service dnsmasq start" is executed. I noticed one change that

This question should be directed to your distro. Whilst Simon might
have some involvement with implementing the init scripts on certain
distros, it cannot be answered without knowing what distro (and the
version thereof) you are using.

Post by Rahul Jain
it edits the /etc/resolv.conf. The reason is when I set the add-mac
option in /etc/dnsmasq.conf and start the dnsmasq service, I'm able
to get the EDNS0 option in a dns query but when I compiled from the
source and ran it, the same thing doesn't happen.