#!/bin/sh
#
# dnsroot - convert the root zone file to tinydns-data format
#
# Toby Betts <toby at su dot bze dot ro>
#
# See <URL:https://cr.yp.to/dnsroot.html> for details and
# the original ./cleanup script.

echo .::127.53.0.1

awk '
  BEGIN { OFS = ":" }
  {
    if ("." == substr($0,1,1)) { next }
    if ("NS" == $4) {
      d = substr($1,0,length($1))
      if ("." == substr(d,length(d),1)) {
        d = substr(d,0,length($1) - 1)
      }
      ns[d] = $5 " " ns[d]
      next
    }
    if ("A" == $4) {
      ip[$1] = $5 " " ip[$1]
      next
    }
  }
  END {
    for (q in ns) {
      split(ns[q],x)
      for (i in x) {
        split(ip[x[i]],y)
        for (j in y) {
          if (y[j] != "") {
            print "&" q "::" y[j]
          }
        }
      }
    }
  }
'