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#!/usr/bin/perl
# *************************************************************************
# * *
# * Copyright (C) 2009 Dmitry E. Oboukhov <unera@debian.org> *
# * *
# * 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 warnings;
use strict;
my $acpi;
die "Can not start acpi: $!\n" unless open $acpi, '-|', 'acpi', '-b', '-a';
my @acpi = <$acpi>;
my @battery =
grep { defined ($_) and /^\d+$/ }
map { s/^.*\s+(\d+)\%.*/$1/s; $_ }
grep /Battery\s+\d+:/, @acpi;
die "Can not get battery level\n" unless @battery;
my $battery = 0;
$battery += $_ for @battery;
$battery /= scalar(grep { $_ } @battery) || 1;
my $ac = grep /Adapter.*on-line/, @acpi;
printf "battery=%d\nac_line=%s\n",
$battery, $ac?"on":"off";
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