A formatação automática no site vinculado tenta interpretar o código do script perl, quebrando-o e tornando-o bastante difícil de entender. Se você clicar em Ver código-fonte , poderá obter o código bruto.
Aqui está o que deve ser o script do ThinkWiki . Por favor, tome nota das advertências nele.
#!/usr/bin/perl
# Keep two ThinkPad batteries (system battery and UltraBay) at similar charge levels
# during discharge by switching back and forth. This reduces wear on the UltraBay
# battery, compared to the hardware's default strategy of fully draining the UltraBay
# battery before switching to the system battery.
# WARNING: This script is experimental and uses undocumented hardware features.
# WARNING: If this script crashes, your battery may be forced to keep draining until empty.
# Distributed under the terms of the GNU General Public License v2 or later.
use strict;
use warnings;
use File::Slurp;
my $thresh = 3; # difference between battery charge levels that justifies switching (hysteresis)
my $default_discharge = 0; # the battery that's discharged as first priority by the BIOS
my $smapi_dir = '/sys/devices/platform/smapi';
my $ac_connected;
my @bat_installed;
my @bat_remaining;
my @bat_state;
my @bat_power_avg;
my @bat_force_discharge;
$SIG{'INT'} = $SIG{'QUIT'} = $SIG{'TERM'} = sub { die("# Killed by SIG$_[0]\n"); };
sub read_chomp_file {
my ($filename) = @_;
my ($x) = read_file($filename) or die "Cannot read $filename\n";
chomp($x);
return $x;
}
# Read battery status from tp_smapi sysfs interface
sub read_status {
$ac_connected = read_chomp_file("$smapi_dir/ac_connected");
for my $b (0..1) {
$bat_installed[$b] = read_chomp_file("$smapi_dir/BAT$b/installed");
$bat_force_discharge[$b] = read_chomp_file("$smapi_dir/BAT$b/force_discharge");
if ($bat_installed[$b]) {
$bat_remaining[$b] = read_chomp_file("$smapi_dir/BAT$b/remaining_percent");
$bat_state[$b] = read_chomp_file("$smapi_dir/BAT$b/state");
$bat_power_avg[$b] = read_chomp_file("$smapi_dir/BAT$b/power_avg") / 1000.0;
}
else { $bat_state[$b] = 'none'; } #This var needs to always have a value for print_bat to not break. This covers the case of starting the program without a battery in the bay/slot.
}
}
# Print status to stdout (ASCII graphics)
sub print_status {
print " ";
sub print_bat {
my ($b) = @_;
my ($ll,$lr,$rl,$rr) = $b ? ('-','>','<','-') : ('<','-','-','>');
my $icon = sprintf("[%3s]", $bat_installed[$b] ? $bat_remaining[$b]."%" : "");
my $arrow;
my $state = $bat_state[$b];
if ($state eq 'charging') {
$arrow = sprintf("$ll--%4.1f--$lr", $bat_power_avg[$b]);
} elsif ($state eq 'discharging') {
$arrow = sprintf("$rl--%4.1f--$rr", -$bat_power_avg[$b]);
} elsif ($state eq 'idle' || $state eq 'none') { #Added none to cover case with no battery in slot when program was started.
$arrow = " ";
} else {
die "Unknown state $state for battery $b";
}
print($b ? "$arrow$icon" : "$icon$arrow");
}
print_bat(0);
print($ac_connected ? ' {AC} ' : ' { } ');
print_bat(1);
print("\n");
}
# Choose which battery to discharge
sub choose_discharge {
sub set_force_discharge {
my ($b,$on) = @_;
return if $b!=$default_discharge; # the non-default battery will be discharged only when necessary anyway
return if $bat_force_discharge[$b]==$on;
write_file("$smapi_dir/BAT$b/force_discharge", ($on?'1':'0')) or die ("Cannot write to $smapi_dir/BAT$b/force_discharge: $!\n");
print("# setting force_discharge on battery $b to $on\n");
$bat_force_discharge[$b] = $on;
}
if ($ac_connected || !$bat_installed[0] || !$bat_installed[1]) {
for $b (0..1) {
set_force_discharge($b,0);
}
} else {
if ($bat_remaining[0] > $bat_remaining[1] + $thresh) {
set_force_discharge(0,1);
set_force_discharge(1,0);
} elsif ($bat_remaining[1] > $bat_remaining[0] + $thresh) {
set_force_discharge(0,0);
set_force_discharge(1,1);
}
}
}
while (1) {
read_status;
print_status;
choose_discharge;
sleep(5);
}
END {
print("# Cleanup\n");
write_file("$smapi_dir/BAT0/force_discharge", ('0'));
write_file("$smapi_dir/BAT1/force_discharge", ('0'));
}
Você precisa salvá-lo em algum arquivo, por exemplo battery-balance.pl
. Então você precisa torná-lo executável. Melhor abrir um terminal e ir para onde você salvou o arquivo, em seguida, executar
chmod a+x battery-balance.pl
Isso torna o script executável para todos os usuários. Mas como este script tenta modificar os arquivos do sistema, ele provavelmente só será executado com êxito com permissões de superusuário. Portanto, você precisa chamá-lo com sudo
:
sudo ./battery-balance.pl
Agora, ele deve mostrar a você qual bateria será drenada e atualizá-la a cada 5 segundos.
Eu sugiro testá-lo desta forma por algum tempo antes de pensar em iniciá-lo de alguma forma automática.