Munin contributed plugins

#!/usr/bin/perl -w

# -*- perl -*-

=head1 NAME

acpi_sys_batt_ Munin plugin to monitor the (note|net)book battery states through sysfs

=head1 APPLICABLE SYSTEMS

Notebooks and netbooks with available /sys/class/power_supply

=head1 CONFIGURATION

Configured change the name of symbolic link

acpi_sys_batt_X_capacity - chart of Charge full by design, Charge full and Charge now

acpi_sys_batt_X_current  - chart of battery current

acpi_sys_batt_X_percents - percentage chart of Current/design voltage, Full/current capacity, Design/full capacity

acpi_sys_batt_X_voltage  - chart of Design min voltage and Current voltage

Where X is the number of batteries from /sys/class/power_supply/BATX

=head1 INTERPRETATION

The plugin shows:

 Charge full by design

 Charge full

 Charge now

 Battery current

 Percentage Current/design voltage

 Percentage Full/current capacity

 Percentage Design/full capacity

 Design min voltage

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

{

    $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."; }

my $sys_path=sprintf("/sys/class/power_supply/BAT%d", $batt_num);

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

sub cat_file

{

	my $file = $_[0];

	my $fh;

	my $file_content = "--";

	open($fh, '<', "${sys_path}/${file}") or die $!;

	foreach my $line (<$fh>)

	{

		chomp ($line);

		$file_content = $line;

	}

	close($fh);

	return $file_content;

}

#print Dumper($batt_data);

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

{

#manufacturer

#model_name

#serial_number

# ----------- status

#technology

#type

	my $batt_name = sprintf("%s %s %s %s (sn: %s)", cat_file('technology'), cat_file('type'), cat_file('manufacturer'), cat_file('model_name'), cat_file('serial_number'));

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

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

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

	print  ("graph_category sensors\n");

	if ($graph_type eq "capacity")

	{

		print  ("graph_vlabel Charge\n");

		print  ("cfd.label Charge full design\ncfd.type GAUGE\ncfd.draw AREA\n");

		print  ("cf.label Charge full\ncf.type GAUGE\ncf.draw AREA\n");

		print  ("cn.label Charge now\ncn.type GAUGE\ncn.draw AREA\n");

	}

	elsif ($graph_type eq "current")

	{

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

		print  ("currn.label Current\ncurrn.type GAUGE\ncurrn.draw AREA\n");

	}

	elsif ($graph_type eq "voltage")

	{

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

		print  ("vmd.label Design min voltage\nvmd.type GAUGE\nvmd.draw AREA\n");

		print  ("vn.label Voltage now\nvn.type GAUGE\nvn.draw AREA\n");

	}

	elsif ($graph_type eq "percents")

	{

		print  ("graph_vlabel %\n");

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

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

		print  ("fc.label Design/full capacity\nfc.type GAUGE\nfc.draw LINE2\n");

	}

	exit 0;

}

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

sub percent

{

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

	return $current/($full/100);

}

#charge_full

#charge_full_design

#charge_now

#current_now

#voltage_min_design

#voltage_now

if ($graph_type eq "capacity")

{

	printf ("cfd.value %d\n", cat_file('charge_full_design'));

	printf ("cf.value %d\n", cat_file('charge_full'));

	printf ("cn.value %d\n", cat_file('charge_now'));

}

elsif ($graph_type eq "voltage")

{

	printf ("vmd.value %d\n", cat_file('voltage_min_design'));

	printf ("vn.value %d\n", cat_file('voltage_now'));

}

elsif ($graph_type eq "current")

{

	printf ("currn.value %d\n", cat_file('current_now'));

}

elsif ($graph_type eq "percents")

{

	printf ("cv.value %d\n", percent(cat_file('voltage_min_design'),cat_file('voltage_now')));

	printf ("cc.value %d\n", percent(cat_file('charge_full'),cat_file('charge_now')));

	printf ("fc.value %d\n", percent(cat_file('charge_full_design'),cat_file('charge_full')));

}