#!/usr/bin/perl
#
# mkhosts
#
# $Id: mkhosts,v 2.1 1995/12/24 19:49:48 hakanson Rel $
# $Source: /usr/etc/local/named/dnstools/RCS/mkhosts,v $
#
# Usage:
#	./mkhosts
#
# Front-end to create /etc/hosts files from DNS data.
#
# Creates a HOSTS.<domain>.<version> file for each domain listed in
#  the ./domlist file.  That file should contain one domain per line, e.g.:
#	cse.ogi.edu
#
# Also requires ./zonelist file containing filename,zonename pairs for
#  each zone, one pair per line, e.g.:
#	/usr/local/named/conf/zone.ogi.cse,cse.ogi.edu
#
# Runs ./dns2hosts for "real" work.
#
# Distribution of the resultant HOSTS.* files is done elsewhere,
#  perhaps by a parent Makefile or calling script, etc.
#

$ver = &getver;

$zone = &getzonelist;

open(DOM, 'domlist') || die "Couldn't open 'domlist': $!\n";

$| = 1;		# set STDOUT to flush

while (<DOM>) {
  chop;
  $fil=HOSTS.".".$_.".".$ver;
  print "$fil\n";
  system("./dns2hosts -d$_ $zone > $fil");
  chmod(0444,$fil);
}


sub getzonelist {
#
# Read ./zonelist, return a list of filename,zonename pairs for dns2hosts args.
# Equivalent to `cat zonelist` .
#
	open(ZONE, 'zonelist') || die "Couldn't open 'zonelist': $!\n";
	while (<ZONE>) {
		chop;
		$zonelist = $zonelist." ".$_;
	}
	return($zonelist);
}


sub getver {
#
# Generate a version number string for HOSTS.* files, based on current date.
# Example: Thu May 20 1993 becomes 930520 .
#
	($sec,$min,$hour,$mday,$mon,$year,@rest) = localtime(time);
	$mon++;     # convert to 1 == January
	$ver = sprintf('%02d%02d%02d', $year, $mon, $mday);
	return($ver);
}


