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#!/usr/bin/env perl
use strict;
use warnings;
use 5.014;
my $inc;
if ($ARGV[0] eq 'inc') {
$inc = 1;
}
elsif ($ARGV[0] eq 'dec') {
$inc = -1;
}
else {
die "unknown arg '$ARGV[0]'";
}
my @levels = (
1,
2,
4,
8,
16,
31,
63,
125,
250,
500,
1000,
);
chomp(my $current = `xbacklight -getf`);
$current = int($current * 10);
my $idx;
for my $i (0..$#levels) {
my $level = $levels[$i];
$idx = $i;
last if $level >= $current;
}
my $new_idx = $idx + $inc;
if ($new_idx >= 0 && $new_idx <= $#levels) {
my $new_level = $levels[$new_idx] * 0.1;
system("xbacklight -set $new_level");
}
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