#!/usr/bin/perl
use strict;
use warnings;

my %cm_servers;
open(FS, '-|', 'fs', 'listcells', '-numeric') or die;
while (<FS>) {
    if (/^Cell dynroot on hosts\.$/) {
    } elsif (/^Cell (\S+) on hosts (.+)\.$/) {
	$cm_servers{$1} = [split(' ', $2)];
    } else {
	die;
    }
}
close(FS) or die;

my %csdb_servers;
my $cell;
open(CSDB, '<', '/var/db/openafs/etc/CellServDB') or die;
while (<CSDB>) {
    if (/^>([^#\s]+)/) {
	$cell = $1;
    } elsif (/^([^#\s]+)/) {
	push(@{$csdb_servers{$cell}}, $1);
    } else {
	die;
    }
}
close(CSDB);

while (my ($cell, $servers) = each(%csdb_servers)) {
    if (!exists($cm_servers{$cell}) or
	join(' ', sort(@{$cm_servers{$cell}})) ne join(' ', sort(@$servers))) {
	system('fs', 'newcell', '-name', $cell, '-servers', @$servers);
    }
}