{% set os = grains['os'] %}
{% set osmajorrelease = grains['osmajorrelease'] %}
{% set path = "files/default/" ~ os ~ "/" ~ osmajorrelease ~ "/" %}
{% for file in salt['cp.list_master']('prefix',path) %}
  {% set path_tokens = file.split('/') %}
  {% if file is string and '/etc/' in file %}
    {{ file }}:
      file.managed:
        - name: {{ file }}
  {% endif %}
{% endfor %}




output is..

host:

Summary for host
-----------
Succeeded: 0
Failed:   0
-----------
Total states run:    0
Total run time:  0.000 ms