#!/usr/bin/perl

###############################################################################
#                                                                             #
# IPFire.org - A linux based firewall                                         #
# Copyright (C) 2008  Michael Tremer & Christian Schmidt                      #
#                                                                             #
# 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 3 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, see <http://www.gnu.org/licenses/>.       #
#                                                                             #
###############################################################################

use strict;
#use warnings;

use RRDs;
require "/var/ipfire/general-functions.pl";
require "${General::swroot}/lang.pl";

# Settings
$ENV{PATH}="/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin";
my $temp = '';
my $ERROR;
my $path_smartctl = "/usr/sbin/smartctl";

my %color = ();
my %mainsettings = ();
&General::readhash("${General::swroot}/main/settings", \%mainsettings);
&General::readhash("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \%color);

if ( $mainsettings{'RRDLOG'} eq "" ){
	$mainsettings{'RRDLOG'}="/var/log/rrd";
	&General::writehash("${General::swroot}/main/settings", \%mainsettings);
}

sub updatehdddata{
	my $disk = $_[0];
	my $standby;
	my @array = split(/\//,$disk);

	if ( ! -e "$mainsettings{'RRDLOG'}/hddshutdown-".$array[$#array].".rrd"){
		# database did not exist -> create
		RRDs::create ("$mainsettings{'RRDLOG'}/hddshutdown-".$array[$#array].".rrd", "--step=300",
		"DS:standby:GAUGE:600:0:1",
		"RRA:AVERAGE:0.5:1:576",
		"RRA:AVERAGE:0.5:6:672",
		"RRA:AVERAGE:0.5:24:732",
		"RRA:AVERAGE:0.5:144:1460");
		$ERROR = RRDs::error;
		print "Error in RRD::create for hddshutdown-".$array[$#array].": $ERROR\n" if $ERROR;
	}

	if (-e "/var/run/hddshutdown-".$array[$#array]) {$standby = 1;}
	else {$standby = 0;}

	RRDs::update ("$mainsettings{'RRDLOG'}/hddshutdown-".$array[$#array].".rrd", "-t", "standby", "N:$standby");
	$ERROR = RRDs::error;
	print "Error in RRD::update for hddshutdown-".$array[$#array].": $ERROR\n" if $ERROR;

	if ( ! -e "$mainsettings{'RRDLOG'}/hddtemp-".$array[$#array].".rrd"){
		# database did not exist -> create
		RRDs::create ("$mainsettings{'RRDLOG'}/hddtemp-".$array[$#array].".rrd", "--step=300",
		"DS:temperature:GAUGE:600:0:100",
		"RRA:AVERAGE:0.5:1:576",
		"RRA:AVERAGE:0.5:6:672",
		"RRA:AVERAGE:0.5:24:732",
		"RRA:AVERAGE:0.5:144:1460");
		$ERROR = RRDs::error;
		print "Error in RRD::create for hdd-".$array[$#array].": $ERROR\n" if $ERROR;
		}

	# Temperaturlesen w�rde die Platte aufwecken!!!
	if (!$standby){
		$temp = 0;
		my $smart_output = '';
		system("$path_smartctl -iHA /dev/$disk > /var/run/smartctl_out_hddtemp-$disk");
		if ( -e "/var/run/smartctl_out_hddtemp-".$array[$#array] ){
			my $hdd_output = `cat /var/run/smartctl_out_hddtemp-$array[$#array] | grep Temperature_`;
			my @t = split(/\s+/,$hdd_output);
			$temp = $t[9];
		}else{$temp = 0;}
		print "Temperature for ".$array[$#array]."->".$temp."<-\n";
		# Nur ins RDD wenn nicht 0 (sonst klappt die min Anzeige nicht)
		if ($temp){
			RRDs::update ("$mainsettings{'RRDLOG'}/hddtemp-".$array[$#array].".rrd", "-t", "temperature", "N:$temp");
			$ERROR = RRDs::error;
			print "Error in RRD::update for hdd-".$array[$#array].": $ERROR\n" if $ERROR;
		}
	}
}

## Update vnstat
system ('/usr/bin/vnstat -u');

my @disks = `kudzu -qps -c HD | grep device: | cut -d" " -f2 | sort | uniq`;
system("unlink /var/run/hddstatus && touch /var/run/hddstatus");
foreach (@disks){
	my $disk = $_;
	chomp $disk;
	print "Working on disk ".$disk.".\n";

	my $status = "";
	my $diskstats = "";
	my $newdiskstats = "";
	my @array = split(/\//,$disk);

	$diskstats = `cat /var/run/hddstats-$array[$#array]`;
	chomp $diskstats;
	my $newdiskstats = `/usr/bin/iostat -d -t $disk | tail -2 | head -1 | awk '{ print \$5","\$6}'`;
	chomp $newdiskstats;
	my $status = `hdparm -C /dev/$disk | tail -1 | cut -d: -f2`;
	chomp $status;

	if ($status !~/standby/ || $diskstats ne $newdiskstats){
		if (-e "/var/run/hddshutdown-".$array[$#array]){system("unlink /var/run/hddshutdown-".$array[$#array]);}
	}

	if (-e "/var/run/hddshutdown-".$array[$#array]){$status = " standby\n";}
	else{$status = " active\n";}

	open(DATEI, ">>/var/run/hddstatus") || die "Datei nicht gefunden";
	print DATEI $disk."-".$status;
	close(DATEI);

	updatehdddata($disk);
}