74 рядки
1.4 KiB
Perl
Executable File
74 рядки
1.4 KiB
Perl
Executable File
#!/usr/bin/perl
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use strict;
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use warnings;
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our $maxfile = "/sys/class/leds/tpacpi\:\:kbd_backlight/max_brightness";
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our $current = "/sys/class/leds/tpacpi\:\:kbd_backlight/brightness";
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our $sleepfile = "$ENV{HOME}/.local/state/kbd_sleep";
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sub readFile
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{
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my $file = shift;
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my $ret;
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if (open(my $fh, '<', $file)) {
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$ret = readline($fh);
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chomp $ret;
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close($fh);
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} else {
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die "Failed to read $file: $?\n";
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}
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return $ret;
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}
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sub writeFile
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{
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my ($file, $value) = @_;
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if (open(my $fh, '>', $file)) {
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print $fh $value;
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close($fh);
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} else {
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die "Failed to write $current\n";
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}
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}
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sub sleepFile
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{
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my $now = readFile($current);
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writeFile($sleepfile,$now);
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writeFile($current,0);
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}
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sub restoreFile
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{
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unless (-e $sleepfile) {
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die "Missing '$sleepfile'. Must not have slept prior to restore.\n"
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}
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my $value = readFile($sleepfile);
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writeFile($current,$value);
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unlink($sleepfile);
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}
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sub rotateFile
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{
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my $max = readFile($maxfile);
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my $now = readFile($current);
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my $new = (($now+1) % ($max+1));
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writeFile($current,$new);
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}
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if (defined($ARGV[0])) {
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if ($ARGV[0] eq 'sleep') {
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sleepFile();
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exit(0);
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} elsif ($ARGV[0] eq 'restore') {
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restoreFile();
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exit(0);
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} elsif ($ARGV[0] ne 'rotate') {
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die "Invalid mode '".$ARGV[0]."'. 'rotate', 'sleep', or 'restore'\n";
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}
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}
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rotateFile();
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