#!/usr/bin/perl -wT

#----------------------------------------------------------------------
# affa watchdog
#
# This script is part of the smeserver-affa package
#
# Copyright (C) 2008 Michael Weinberger, neddix Stuttgart, Germany
# 
# 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
# 
#----------------------------------------------------------------------

use strict;
use Errno;
use esmith::DB::db;
use esmith::ConfigDB;
use Date::Format;
use File::Path;
use Mail::Send;

use constant _TRIGGER=>200703281100;
use constant _JOBNAME=>'nx scheduled';
use constant _EMAIL=>'mweinber@neddix.de';
use constant _BACKUPHOST=>'backup.neddix.de (172.22.32.2)';
use constant _SCHEDULED=>'Wed Mar 28 13:10:14 2007';
use constant _WDSCRIPT=>'affa-watchdog-nx-172.22.32.6';

BEGIN
	{
	# Clear PATH and related environment variables so that calls to
	# external programs do not cause results to be tainted. See
	# "perlsec" manual page for details.
	
	$ENV {'BASH_ENV'} = '';
	$ENV {'PATH'} = '';
	}

sub sendEmail($);

my $now = Date::Format::time2str("%Y%m%d%H%M",time());
my $nowHour = int(Date::Format::time2str("%k",time()));

exit 0 if( $now<(_TRIGGER) );

(my $Reminder = (_TRIGGER)) =~ s/........(..)../$1/;
$Reminder=int($Reminder);

if( -f "/etc/cron.hourly/".(_WDSCRIPT) ) # send the first warning
	{
	sendEmail('');
	rename( "/etc/cron.hourly/".(_WDSCRIPT), "/etc/cron.hourly/".(_WDSCRIPT)."-reminder" );
	}
elsif( $now-(_TRIGGER) > 1200 and $nowHour==$Reminder ) # send daily reminder 
	{
	sendEmail(' (Reminder) ');
	}

exit 0;

sub sendEmail($)
	{
	my $config = esmith::ConfigDB->open_ro or die "Could not open config db.";
	my $LocalIP=$config->get("LocalIP")->value;
	my $SystemName=$config->get("SystemName")->value;
	my $DomainName=$config->get("DomainName")->value;
	my $reminder=shift(@_);
	my $msg = new Mail::Send;
	$msg->subject("Error: ".$reminder."Scheduled affa job '".(_JOBNAME)."' did not run on ".(_BACKUPHOST)."");
	$msg->to(_EMAIL);
	$msg->set("From", "\"Affa watchdog on $SystemName.$DomainName ($LocalIP)\" <noreply\@$SystemName.$DomainName>");
	my $fh = $msg->open;
	print $fh "The backup job '".(_JOBNAME)."' scheduled on ".(_SCHEDULED)." did not run.\n";
	print $fh "Please check and fix your affa configuration on ".(_BACKUPHOST).".\n";
	print $fh "A reminder message will be sent at $Reminder:00 hours, if the error continues unchecked.\n\n";
	print $fh "Remove the file /etc/cron.hourly/".(_WDSCRIPT)."-reminder to stop receiving reminder messages.\n";
	$fh->close; 
	}