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Thinkpad control scripts

SystemD unit file to give ownership or necessary sys files to user

toggle_outputs.sh simply swaps between two most common layouts with
sway/displays.pl

kbd_backlight.pl simply increments the current backlight brightness then
%3 to cycle between off, low, high

blc.pl is an overly complicated screen backlight control
master
John Mertz 11 months ago
parent
commit
895b9b5588
4 changed files with 360 additions and 0 deletions
  1. +304
    -0
      thinkpad/blc.pl
  2. +39
    -0
      thinkpad/kbd_backlight.pl
  3. +9
    -0
      thinkpad/toggle_outputs.sh
  4. +8
    -0
      thinkpad/user-thinkpad-controls@.service

+ 304
- 0
thinkpad/blc.pl View File

@@ -0,0 +1,305 @@
#!/usr/bin/perl -w

# Files containing current and max brightness values
my $cur_file = "/sys/class/backlight/intel_backlight/brightness";
my $max_file = "/sys/class/backlight/intel_backlight/max_brightness";
my $last_file = "/home/jpm/.config/blc.last";

sub to_percent {
my $value = shift;
if ($value eq "Permission Denied") {
return $value;
} else {
$value = int($value/get_max()*100);
return $value . '%';
}
}

sub get_offset {
return int(get_max()/100);
}

sub get_current {
open(my $c,'<',"$cur_file");
my $current = <$c>;
close $c;
chomp $current;
return $current;
}

sub get_max {
open(my $m,'<',"$max_file");
my $max = <$m>;
close $m;
chomp $max;
return $max;
}

sub get_min {
return int((get_max()/100)+2);
}

sub writable {
if (! -w $cur_file) {
return 0;
} else {
return 1;
}
}

sub increment {
if (writable()) {
my $current = get_current();
my $max = get_max();
my $target = $current+get_offset();
if ($target > $max) {
$target = $max;
}
open(my $c,'>',"$cur_file");
print $c $target;
close $c;
return $target;
} else {
return "Permission Denied";
}
}

sub decrement {
if (writable()) {
my $current = get_current();
my $min = get_min();
my $target = $current-get_offset();
if ($target < $min) {
$target = $min;
}
open(my $c,'>',"$cur_file");
print $c $target;
close $c;
return $target;
} else {
return "Permission Denied";
}
}

sub set {
my $value = shift;
if (writable()) {
$current = get_current();
if ($value > $current) {
for (my $i=$current;$i<=$value;$i++) {
open(my $c,'>',"$cur_file");
print $c $i;
close $c;
}
} else {
for (my $i=$current;$i>=$value;$i--) {
open(my $c,'>',"$cur_file");
print $c $i;
close $c;
}
}
return $value;
} else {
return "Permission Denied";
}
}

sub help {
print "
Backlight Control

Usage: blc.pl [--silent|--notify] [OPTION] [VALUE]

With no option the backlight information is printed as JSON.

Output printed to STDOUT unless:

--silent Do not display output (overrides --notify)
--notify Send output to notification daemon. --notify=N will
change the display duration in ms. Default is 200ms

Output option must preceed the first Action option.

Actions:

= VALUE Set backlight to specific value. VALUE greater than
100 will be treated as absolute value. VALUE eqaul to
or less than 100 will be treated as a percentage
+= VALUE Increment by VALUE percent
-- Decrement by 1%
-= VALUE Decrement by VALUE percent

Actions corrected to 1% or 100% if over or under. All actions
provide output as a percentage, with the % symbol.

Final percentage printed as below, skipping other options.

Print:

== Print current absolute value
^ Print maximum absolute value
% Print current percentage (does not include % symbol)
--help Help (not impacted by --silent or --notify)
--HELP Advanced help (same as above)

Any other option will be printed literally";
}

sub advanced {
$current = get_current();
$max = get_max();
print ".

Print functions can be strung together but command will exit
with the first non-print option. eg.

\$ blc.pl == / ^
21/100
\$ blc.pl == ++
('==' ignored)
(Backlight incremented)

Escape options with \\ in quotes to display them literally. eg.

\$ blc.pl == / ^ '\\=' % \'\\%\'
" . $current . "/" . $max . "=" . int($current/$max*100) . "%

Only one \'\\' is removed per block. eg.

\$ blc.pl '\\% \\'
% \\

";
}

my $current = get_current();
my (@output, $target, $silent, $notify);

if (scalar @ARGV) {
for (my $i=0;$i<scalar @ARGV;$i++) {
if ($ARGV[$i] eq '++') {
$target = increment();
@output = to_percent($target);
last;
} elsif ($ARGV[$i] eq '+=') {
for (my $i=0;$i<scalar @ARGV;$i++) {
if ($ARGV[$i] eq '+=') {
if (defined $ARGV[($i+1)]) {
$count = $ARGV[($i+1)];
for (my $j=0;$j<$count;$j++) {
$target = increment();
if ($target eq "Permission Denied") {
last;
}
}
@output = to_percent($target);
} else {
@output = ("No value after $ARGV[$i]");
}
last;
}
}
last;
} elsif ($ARGV[$i] eq '--') {
$target = decrement();
@output = to_percent($target);
last;
} elsif ($ARGV[$i] eq '-=') {
for (my $i=0;$i<scalar @ARGV;$i++) {
if ($ARGV[$i] eq '-=') {
if (defined $ARGV[($i+1)]) {
$count = $ARGV[($i+1)];
for (my $j=0;$j<$count;$j++) {
$target = decrement();
if ($target eq "Permission Denied") {
last;
}
}
@output = to_percent($target);
} else {
@output = ("No value after $ARGV[$i]");
}
last;
}
}
last;
} elsif ($ARGV[$i] eq '=') {
$target = $ARGV[($i+1)];
if (defined $target) {
if ($target < 1) {
$target = set(get_min());
} elsif ($target > get_max()) {
$target = set(get_max());
} elsif ($target > 100) {
$target = set($target);
} else {
$target = set(int((get_max()*$target/100)+1));
}
if ($target eq "Permission Denied") {
@output = $target;
} else {
@output = to_percent($target);
}
last;
} else {
@output = ("No value after $ARGV[$i]");
last;
}
} elsif ($ARGV[$i] eq '%') {
push @output,int(get_current()/get_max()*100);
} elsif ($ARGV[$i] eq '^') {
push @output,get_max();
} elsif ($ARGV[$i] eq '==') {
push @output,get_current();
} elsif ($ARGV[$i] eq '--help') {
help();
print " (see --HELP).\n\n";
exit();
} elsif ($ARGV[$i] eq '--HELP') {
help();
advanced();
exit();
} elsif ($ARGV[$i] eq '--silent') {
$silent = 'TRUE';
} elsif ($ARGV[$i] =~ /^--notify/) {
$notify = 'TRUE';
if ($ARGV[$i] =~ /=[0-9]+$/) {
$duration = $ARGV[$i];
$duration =~ s/.*=([0-9]+)/$1/;
} else {
$duration = 200;
}
} else {
my $add = $ARGV[$i];
$add =~ s/\\//;
push @output,$add;
}
}
} else {
@output = ('{"Backlight":{"Max":"' . get_max() . '","Current":"' . get_current() . '","Percentage","' . int(get_current()/get_max()*100) . '%"}}');
}


open(my $fh,'>',$last_file);
print $fh get_current();
close($fh);

if ($silent) {
exit();
} elsif ($notify) {
# Don't output anything if the value didn't change
if ($current == get_current()) {
exit();
}
my $concat;
foreach (@output) {
$concat .= $_;
}
system "notify-send --urgency=normal -i /usr/share/icons/Papirus-Dark-Grey/48x48/status/notification-display-brightness.svg -t $duration \"$concat\"";
exit();
} else {
print foreach @output;
print "\n";
exit();
}

+ 39
- 0
thinkpad/kbd_backlight.pl View File

@@ -0,0 +1,39 @@
#!/usr/bin/perl

use strict;
use warnings;

my $maxfile = "/sys/class/leds/tpacpi\:\:kbd_backlight/max_brightness";
my $current = "/sys/class/leds/tpacpi\:\:kbd_backlight/brightness";

my ($max, $now, $new);
if (open(my $m, '<', $maxfile)) {
$max = readline($m);
chomp $max;
close($m);
} else {
print "Failed to read $maxfile\n";
exit;
}
print STDERR "max = $max\n";

if (open(my $c, '<', $current)) {
$now = readline($c);
chomp $now;
close($c);
} else {
print "Failed to read $current\n";
exit;
}
print STDERR "now = $now\n";

if (open(my $fh, '>', $current)) {
$new = (($now+1) % ($max+1));
chomp $new;
print $fh $new;
close($fh);
} else {
print "Failed to write $current\n";
exit;
}
print STDERR "new = $new\n";

+ 9
- 0
thinkpad/toggle_outputs.sh View File

@@ -0,0 +1,9 @@
#!/bin/bash

CURRENT=`cat /home/jpm/.config/last_display`

if [ "$CURRENT" == "detached" ]; then
/home/jpm/scripts/sway/displays.pl stacked
else
/home/jpm/scripts/sway/displays.pl detached
fi

+ 8
- 0
thinkpad/user-thinkpad-controls@.service View File

@@ -0,0 +1,8 @@
[Unit]
Description=Give ownership of backlight to %I

[Service]
ExecStart=chown %i:%i /sys/class/backlight/intel_backlight/brightness /sys/class/leds/tpacpi::kbd_backlight/brightness

[Install]
WantedBy=multi-user.target

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