Munin contributed plugins

#!/usr/bin/perl -w

# -*- perl -*- 

=head1 NAME

acpi_batt_ Munin plugin to monitor the (note|net)book battery states through procfs

=head1 APPLICABLE SYSTEMS

Notebooks and netbooks with avialable /proc/acpi/battery

=head1 CONFIGURATION

Configured change the name of symbolic link

acpi_batt_X_capacity - chart of Design capacity, Last full capacity, Design capacity low,

                       Design capacity warning, Capacity granularity 1, Capacity granularity 2,

                       Remaining capacity, Present rate (mA)

acpi_batt_X_percents - percentage chart of Current voltage, Current capacity, Full capacity (of design)

acpi_batt_X_voltage  - chart of Design voltage, Present voltage

Where X is the number of battery from /proc/acpi/battery/BATX

=head1 INTERPRETATION

The plugin shows:

 Design capacity

 Last full capacity

 Design capacity low

 Design capacity warning

 Capacity granularity 1

 Capacity granularity 2

 Remaining capacity

 Present rate (mA)

 Percentage Current/design voltage

 Percentage Full/current capacity

 Percentage Design/full capacity

 Design voltage

 Present voltage

=head1 MAGIC MARKERS

#%# family=power

=head1 VERSION 

=head1 BUGS 

None known.

=head1 AUTHOR

Gorlow Maxim <sheridan@sheridan-home.ru>

=head1 LICENSE

GPLv2

=cut

use strict;

#use Data::Dumper;

my ($graph_type, $batt_num);

if ($0 =~ /^(?:|.*\/)acpi_batt_([^_]+)_(.+)$/)

{

    $graph_type = $2;

    $batt_num = $1;

}

elsif (!defined($batt_num) or !defined($graph_type)) {

    die "# Error: couldn't understand what I'm supposed to monitor."; }

#print "$batt_num, $graph_type \n";

sub trim

{

	my($string)=@_;

	for ($string)

	{

		s/^\s+//;

		s/\s+$//;

	}

	return $string;

}

sub read_data

{

	my $file = $_[0];

	my ($fh, $var, $val);

	my @tmp;

	my $result = {};

	open($fh, '<', "/proc/acpi/battery/BAT${batt_num}/${file}") or die $!;

	foreach my $line (<$fh>)

	{

		chomp ($line);

		($var, $val) = split(':', $line);

		if ( $val =~ m/^\s*$/ )

		{

			$val = "unknown";

		}

		elsif ( $var ne "batery type" or $var ne "serial number" or $var ne "OEM info" )

		{ 

			@tmp = split(" " ,$val);

			$val = trim($tmp[0]);

		}

		$result->{$var} = $val;

		#print "$var, -$val- \n";

	}

	close($fh);

	return $result;

}

my $batt_data = {};

$batt_data->{'info'}  = read_data("info" );

$batt_data->{'state'} = read_data("state");

#print Dumper($batt_data);

if ($ARGV[0] and $ARGV[0] eq "config")

{

	my $batt_name = sprintf("%s %s %s", $batt_data->{'info'}{'OEM info'}, $batt_data->{'info'}{'battery type'}, $batt_data->{'info'}{'model number'});

	print  ("graph_args --base 1000\n");

	printf ("graph_title Battery %s (%s) %s\n" , $batt_num, $batt_name, $graph_type);

	printf ("graph_info This graph shows battery %s (%s) %s\n" , $batt_num, $batt_name, $graph_type);

	print  ("graph_category power\n");

	if ($graph_type eq "capacity")

	{

		print  ("graph_vlabel Capacity, mAh\n");

		print  ("dc.label Design capacity\ndc.type GAUGE\ndc.draw AREA\n");

		print  ("lfc.label Last full capacity\nlfc.type GAUGE\nlfc.draw AREA\n");

		print  ("dcl.label Design capacity low\ndcl.type GAUGE\ndcl.draw LINE2\n");

		print  ("dcw.label Design capacity warning\ndcw.type GAUGE\ndcw.draw LINE2\n");

		print  ("cg1.label Capacity granularity 1\ncg1.type GAUGE\ncg1.draw LINE2\n");

		print  ("cg2.label Capacity granularity 2\ncg2.type GAUGE\ncg2.draw LINE2\n");

		print  ("rc.label Remaining capacity\nrc.type GAUGE\nrc.draw LINE2\n");

		print  ("pr.label Present rate (mA)\npr.type GAUGE\npr.draw LINE2\n");

	}

	elsif ($graph_type eq "voltage")

	{

		print  ("graph_vlabel Voltage, mV\n");

		print  ("d.label Design voltage\nd.type GAUGE\nd.draw AREA\n");

		print  ("p.label Present voltage\np.type GAUGE\np.draw AREA\n");

	}

	elsif ($graph_type eq "percents")

	{

		print  ("graph_vlabel %\n");

		print  ("cv.label Current voltage\ncv.type GAUGE\ncv.draw LINE2\n");

		print  ("cc.label Current capacity\ncc.type GAUGE\ncc.draw LINE2\n");

		print  ("fc.label Full capacity (of design)\nfc.type GAUGE\nfc.draw LINE2\n");

	}

	exit 0;

}

#$batt_data->{'info'}{''}

sub percent

{

	my ($full, $current) = @_[0..1];

	return $current/($full/100);

}

if ($graph_type eq "capacity")

{

	printf ("dc.value %s\n", $batt_data->{'info'}{'design capacity'});

	printf ("lfc.value %s\n", $batt_data->{'info'}{'last full capacity'});

	printf ("dcl.value %s\n", $batt_data->{'info'}{'design capacity low'});

	printf ("dcw.value %s\n", $batt_data->{'info'}{'design capacity warning'});

	printf ("cg1.value %s\n", $batt_data->{'info'}{'capacity granularity 1'});

	printf ("cg2.value %s\n", $batt_data->{'info'}{'capacity granularity 2'});

	printf ("rc.value %s\n", $batt_data->{'state'}{'remaining capacity'});

	printf ("pr.value %s\n", $batt_data->{'state'}{'present rate'});

}

elsif ($graph_type eq "voltage")

{

	printf ("d.value %s\n", $batt_data->{'info'}{'design voltage'});

	printf ("p.value %s\n", $batt_data->{'state'}{'present voltage'});

}

elsif ($graph_type eq "percents")

{

	printf ("cv.value %s\n", percent($batt_data->{'info'}{'design voltage'},$batt_data->{'state'}{'present voltage'}));

	printf ("cc.value %s\n", percent($batt_data->{'info'}{'design capacity'},$batt_data->{'state'}{'remaining capacity'}));

	printf ("fc.value %s\n", percent($batt_data->{'info'}{'design capacity'},$batt_data->{'info'}{'last full capacity'}));

}