+ close($sock);
+
+ %values;
+}
+
+sub fetch_iotcore(@) {
+ my $url = shift;
+
+ my $ua = LWP::UserAgent->new;
+ $ua->timeout(1);
+
+ my $resp = $ua->get($url);
+ return undef if (!$resp->is_success);
+
+ my $pdin = decode_json($resp->decoded_content);
+ return undef if (!defined($pdin));
+
+ my $value = hex($pdin->{'data'}->{'value'});
+
+ $value;
+}
+
+sub dayGraphFunc {
+ my $dataSrc = shift;
+ my $mode = shift;
+ my $color = shift;
+ my $label = shift;
+ my $dataPoints = shift;
+ my @args = ();
+ push @args, "CDEF:prev${mode}1=PREV(${dataSrc})";
+ for (my $i = 1; $i < $dataPoints - 1; ++$i) {
+ my $prev = $i;
+ my $next = $i+1;
+ push @args, "CDEF:prev${mode}${next}=PREV(prev${mode}${prev})";
+ }
+ my $dayCons = '';
+ my $consFunc = '';
+ if ($mode ne 'AVG') {
+ for (my $i = 1; $i < $dataPoints; ++$i) {
+ $dayCons .= "prev${mode}${i},";
+ $consFunc .= ",${mode}";
+ }
+ } else {
+ for (my $i = 1; $i < $dataPoints; ++$i) {
+ $dayCons .= "prev${mode}${i},";
+ }
+ $consFunc = ",${dataPoints},${mode}";
+ }
+ push @args, "CDEF:day${mode}=${dayCons}${dataSrc}${consFunc}";
+ push @args, "CDEF:fillCalDay${mode}0=COUNT,${dataPoints},%,0,EQ,day${mode},UNKN,IF";
+ for (my $i = 1; $i < $dataPoints; ++$i) {
+ my $prev = $i-1;
+ my $next = $i;
+ push @args, "CDEF:fillCalDay${mode}${next}=PREV(fillCalDay${mode}${prev})";
+ }
+ my $fillPoint = '';
+ my $if = '';
+ for (my $i = 0; $i < $dataPoints; ++$i) {
+ $fillPoint .= "COUNT,${dataPoints},%,${i},EQ,fillCalDay${mode}${i},";
+ $if .= ",IF";
+ }
+ push @args, "CDEF:${mode}Curve=${fillPoint}UNKN${if}";
+ my $forwardShift = (24*60*60) * ($dataPoints - 1) / $dataPoints;
+ push @args, "SHIFT:${mode}Curve:-${forwardShift}";
+ push @args, "LINE1:${mode}Curve#${color}:${label}";
+ return \@args;
+}
+
+sub cfgToGraphDef {
+ my $cfg = shift;
+ my $varname = shift;
+ my $dpPerDay= shift;
+ my @graphDef = ();
+ foreach my $subGraph (@$cfg) {
+ if ($subGraph eq 'avg') {
+ push @graphDef, "LINE1:${varname}-avg#FF0000";
+ } elsif ($subGraph eq 'day-min') {
+ push @graphDef, @{dayGraphFunc("${varname}-min", 'MIN', '0000ff', 'Day Minimum Temperature', $dpPerDay)};
+ } elsif ($subGraph eq 'day-max') {
+ push @graphDef, @{dayGraphFunc("${varname}-max", 'MAX', '00ff00', 'Day Maximum Temperature', $dpPerDay)};
+ } elsif ($subGraph eq 'day-avg') {
+ push @graphDef, @{dayGraphFunc("${varname}-houravg", 'AVG', 'ff0000', 'Day Average Temperature', $dpPerDay)};
+ }
+ }
+ return \@graphDef;
+}
+
+if ($> == 0) {
+ if (@ARGV != 2) {
+ print STDERR "Running as root, please provide UID as 2th argument!\n";
+ exit(1);
+ }
+
+ print "Running as root, switching to ".$ARGV[1]."\n";
+ $< = $> = $ARGV[1];
+}
+
+foreach my $host (@$hosts) {
+ my $rrdfile = $host->{'rrdfile'};
+
+ foreach my $var (keys(%{$host->{'vars'}})) {
+ $host->{'vars'}->{$var}->{'min'} = 'U' if (!defined($host->{'vars'}->{$var}->{'min'}));
+ $host->{'vars'}->{$var}->{'max'} = 'U' if (!defined($host->{'vars'}->{$var}->{'max'}));
+ }
+
+ if (-e "${rrdfile}") {
+ print "Reading old ${rrdfile} to preserve data...\n";
+
+ my $rrdinfo = RRDs::info("${rrdfile}");
+ if (RRDs::error) {
+ print "Error while getting info: " . RRDs::error . "\n";
+ exit 1;
+ }
+
+ (my $start, my $ostep, my $names, my $data) =
+ RRDs::fetch("${rrdfile}",
+ "-s " . (time() - ($rrdinfo->{'rra[0].rows'} * $rrdinfo->{'step'})),
+ "AVERAGE");
+
+ if (RRDs::error) {
+ print "Error while fetching data: " . RRDs::error . "\n";
+ exit 1;
+ }
+
+ foreach my $field (@$names) {
+ if (! -e "${rrdfile}.${field}") {
+ rrdcreate("${rrdfile}.${field}",
+ "${field}",
+ $host->{'vars'},
+ (${start}-${ostep}));
+ }
+ }
+
+ my $pos = $start;
+ foreach my $line (@$data) {
+ foreach my $field (@$names) {
+ my $val = shift (@$line);
+ $val = 'U' if (!defined($val));
+
+ RRDs::update("${rrdfile}.${field}", "${pos}:${val}");
+ if (RRDs::error) {
+ print "Can't insert data: " . RRDs::error . "\n";
+ exit 1;
+ }
+
+ }
+
+ $pos += $ostep;
+
+ if ((($pos-$start)/$ostep) == $#$data) {
+ last;
+ }
+ }
+
+ rename("${rrdfile}", "${rrdfile}.old") or die "Can't rename old file: $!\n";
+ }
+
+ foreach my $field (@{$host->{'fields'}}) {
+ if (! -e "${rrdfile}.${field}") {
+ print "Creating ${rrdfile}.${field}...\n";
+ rrdcreate("${rrdfile}.${field}",
+ "${field}",
+ $host->{'vars'});
+ }
+
+ my $rrdinfo = RRDs::info("${rrdfile}.${field}");
+ if (RRDs::error) {
+ print "Error while getting info: " . RRDs::error . "\n";
+ exit 1;
+ }
+
+ my $limitsChanged = 0;
+ if (defined($rrdinfo->{"ds[${field}].min"})) {
+ if ($rrdinfo->{"ds[${field}].min"} ne $host->{'vars'}->{$field}->{'min'}) {
+ $limitsChanged = 1;
+ RRDs::tune("${rrdfile}.${field}","-i",$field.":".$host->{'vars'}->{$field}->{'min'});
+ }
+ } else {
+ if ($host->{'vars'}->{$field}->{'min'} ne 'U') {
+ $limitsChanged = 1;
+ RRDs::tune("${rrdfile}.${field}","-i",$field.":".$host->{'vars'}->{$field}->{'min'});
+ }
+ }
+
+ if (RRDs::error) {
+ print "Error while setting min: " . RRDs::error . "\n";
+ exit 1;
+ }
+
+ if (defined($rrdinfo->{"ds[${field}].max"})) {
+ if ($rrdinfo->{"ds[${field}].max"} ne $host->{'vars'}->{$field}->{'max'}) {
+ $limitsChanged = 1;
+ RRDs::tune("${rrdfile}.${field}","-a",$field.":".$host->{'vars'}->{$field}->{'max'});
+ }
+ } else {
+ if ($host->{'vars'}->{$field}->{'max'} ne 'U') {
+ $limitsChanged = 1;
+ RRDs::tune("${rrdfile}.${field}","-a",$field.":".$host->{'vars'}->{$field}->{'max'});
+ }
+ }
+
+ if (RRDs::error) {
+ print "Error while setting max: " . RRDs::error . "\n";
+ exit 1;
+ }
+
+ if ($rrdinfo->{'rra[0].rows'} != $keep ||
+ !defined($rrdinfo->{'rra[3].rows'}) || $rrdinfo->{'rra[3].rows'} != $keepHours ||
+ $limitsChanged == 1) {
+
+ print "Resizing ${rrdfile}.${field} from " . $rrdinfo->{'rra[0].rows'} .
+ " to ${keep} samples.\n";
+
+ (my $start, my $ostep, my $names, my $data) =
+ RRDs::fetch("${rrdfile}.${field}",
+ "-s " . (time() - ($rrdinfo->{'rra[0].rows'} * $rrdinfo->{'step'})),
+ "AVERAGE");
+
+ if (RRDs::error) {
+ print "Error while fetching data: " . RRDs::error . "\n";
+ exit 1;
+ }
+
+ rrdcreate("${rrdfile}.${field}.new",
+ "${field}",
+ $host->{'vars'},
+ (${start}-${ostep}));
+
+ print "Preserving data in file ${rrdfile}.${field} since " . localtime($start) . "\n";
+
+ my $pos = $start;
+ foreach my $line (@$data) {
+ my $vline = "${pos}";
+
+ foreach my $val (@$line) {
+ $val = 'U' if (!defined($val));
+ $vline .= ":${val}";
+ }
+ RRDs::update("${rrdfile}.${field}.new", $vline) or die "Can't insert data\n";