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|
#!/usr/bin/perl
#
# Convert hostgroup entries in a mon configuration file
# into a local hosts file
#
# Jim Trocki, trockij@arctic.org
#
# $Id: cf-to-hosts,v 1.2 2005/04/17 07:42:27 trockij Exp $
#
# Copyright (C) 1998, Jim Trocki
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
use strict;
sub resolve_hosts;
sub print_hosts;
sub read_cf;
use Getopt::Std;
use Socket;
my %resolved;
my %opt;
getopts ("hM", \%opt);
if ($opt{"h"})
{
print <<EOF;
usage: cf-to-hosts [-M] mon.cf
-M pre-process with m4
EOF
exit;
}
my $f = shift;
die "supply config file\n" if ($f eq "");
if ((my $e = read_cf ($f)) ne "")
{
die "error reading $f: $e\n";
}
print_hosts;
exit;
sub print_hosts
{
foreach my $host (keys %resolved)
{
print "$resolved{$host}\t$host\n";
}
}
sub resolve_hosts
{
my ($hosts) = @_;
my $err = 0;
foreach my $host (split (/\s+/, $hosts))
{
next if (defined $resolved{$host});
my $ip = gethostbyname ($host);
if (!defined ($ip))
{
print STDERR "could not look up $host\n";
$err++;
}
else
{
$resolved{$host} = inet_ntoa ($ip);
}
}
$err;
}
sub read_cf
{
my $f = shift;
if ($opt{"M"} || $f =~ /\.m4$/i)
{
open (IN, "m4 $f |") || return "$!";
}
else
{
open (IN, "$f") || return "$!";
}
my $linepart = "";
my $l = "";
my $acc_line = undef;
my $ingroup = 0;
for (;;)
{
last if (!defined ($linepart = <IN>));
next if $linepart =~ /^\s*#/;
#
# accumulate multi-line lines (ones which are \-escaped)
#
if (!defined $acc_line) { $linepart =~ s/^\s*//; }
if ($linepart =~ /^(.*)\\\s*$/)
{
$acc_line .= $1;
chomp $acc_line;
next;
}
else
{
$acc_line .= $linepart;
}
$l = $acc_line;
$acc_line = undef;
chomp $l;
$l =~ s/^\s*//;
$l =~ s/\s*$//;
$linepart = "";
if ($l eq "")
{
$ingroup = 0;
next;
}
if ($l =~ /^hostgroup\s+(\S+)\s+(.*)/)
{
$ingroup = 1;
resolve_hosts ($2);
next;
}
elsif ($ingroup)
{
resolve_hosts ($l);
next;
}
}
close (IN);
return "";
}
|
