Setup DNS configuration for cygwin/babun using windows configuration

dns_setup.sh

#! /bin/bash
ipconfig /all | gawk '
  BEGIN {
    # Initialize state variables.
    addSuffixes=0;
    searchList="";
    addServers=0
  };

  {
    # Strip undesired carriage returns from DOS style command output.
    sub("\x0D","");
  };
  
  /:/ {
    # Stop accumulations when we encounter a new line header.
    # No lines we are interested in contain a colon.
    addSuffixes=0;
    addServers=0;
  };
 
  /DNS Servers/ {
    # Start identifying DNS servers when we see the appropriate line header.
    addServers=1;
    # Convert the current line to the same form as subsequent entries.
    sub("[^:]+: ","");
  };
  /DNS-Server/ {
    # Start identifying DNS servers when we see the appropriate line header.
    addServers=1;
    # Convert the current line to the same form as subsequent entries.
    sub("[^:]+: ","");
  };
 
  {
    # If we are identifying DNS servers the current line contains an IP number
    # for a server, so configure a "nameserver" record with this IP number.
    if (addServers) {
      printf ("nameserver %s\n", $1)
    }
  };
  
  /Primary Dns Suffix  \. \. \. \. \. \. \. : ./ {
    # When we spot the Primary DNS suffix use it to configure a "domain" record
    # and append it to the searchList for later use.
    sub("[^:]+: ","");
    printf ("domain %s\n", $0);
    searchList=(searchList " " $1);
  };
  /res DNS-Suffix \. \. \. \. \. \. \. : / {
    # When we spot the Primary DNS suffix use it to configure a "domain" record
    # and append it to the searchList for later use.
    sub("[^:]+: ","");
    printf ("domain %s\n", $0);
    searchList=(searchList " " $1);
  };
 
  /DNS Suffix Search List/ {
    # Start accumulating searchList entries for later use.
    addSuffixes=1;
    # Convert the current line into the same form as any subsequent entries.
    sub("[^:]+: ","");
  };
  /DNS-Suffixsuchliste/ {
    # Start accumulating searchList entries for later use.
    addSuffixes=1;
    # Convert the current line into the same form as any subsequent entries.
    sub("[^:]+: ","");
  };
 
  {
    # If we are accumulating searchList entries the current line contains a
    # suffix, append it to the list.
    if (addSuffixes) {
      searchList=(searchList " " $1);
    }
  };
 
  END {
    # Final clean up. If we accumulated a non-empty searchList configure a
    # "search" record with the contents of the list.
    if (searchList) {
      print "search " searchList;
    }
  }
 
' | sort -u >/etc/resolv.conf