Here are some instructions to achieve the above:

1. Create a sudoers file to give the priviledges to a script:
and add here the following;
2. Create the script in /usr/share/call-log/callLogHelper.sh
and add the two calls that need to be executed as root.

3. in the call-log.sh add the line:
replacing the previous sudo lines.

attached are the files for clarity, just remove the ".txt" at the end.

Hope it helps.