*: License under GPL v3+.

[config/dotfiles.git] / bin / battery.pl

diff --git a/bin/battery.pl b/bin/battery.pl
index 6a9ce2cbb21f55c1799cf6bbfc7cfee04fa0d4aa..41956ac43fb431dd9862d45a08e1a38ed5e56882 100755 (executable)
--- a/bin/battery.pl
+++ b/bin/battery.pl
@@ -1,5 +1,20 @@
 #!/usr/bin/perl
 
+# Copyright (C) 2011-2012  Simon Ruderich
+#
+# 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;
@@ -9,7 +24,7 @@ my $path = '/sys/class/power_supply/BAT0/uevent';
 
 # No battery available.
 if (! -e $path) {
-    exit;
+    exit 1;
 }
 
 my $screen_mode = (defined $ARGV[0] and $ARGV[0] eq '-s');
@@ -17,7 +32,7 @@ my $tmux_mode   = (defined $ARGV[0] and $ARGV[0] eq '-t');
 
 my %battery;
 
-open my $file, '<', $path;
+open my $file, '<', $path or die $!;
 while (<$file>) {
     /^POWER_SUPPLY_([A-Z_]+)=(.+)$/;
     $battery{$1} = $2;
@@ -38,6 +53,7 @@ if ($screen_mode) {
     }
 
     print "\005{+$color}$charge%\005{-}\n";
+
 # Same in tmux mode.
 } elsif ($tmux_mode) {
     my $color;
@@ -51,7 +67,7 @@ if ($screen_mode) {
 
     print "#[fg=$color,bold]$charge%#[default]\n";
 
-# Just text output.
+# Plain text output.
 } else {
     print "$charge%\n";
 }