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#!/usr/bin/perl -w
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# AC Power Handler v1.0
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# Handles AC power events for Panasonic notebooks
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#
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# Copyright (C) 2004 David Bronaugh
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#
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# Requires pcc_acpi driver
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 2 as
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# published by the Free Software Foundation
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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use strict;
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use POSIX qw(ceil floor);
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our($config);
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our($power_state);
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sub read_file {
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my($file) = @_;
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my($fh);
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my($contents) = "";
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if(open($fh, $file)) {
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$/ = undef;
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$contents = <$fh>;
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close($fh);
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} else {
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print "Couldn't open file " . $file . "!\n";
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}
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return $contents;
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}
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sub write_file {
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my($file, $contents) = @_;
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my($fh);
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if(open($fh, ">", $file)) {
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print $fh $contents;
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close($fh);
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return 1;
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} else {
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print "Couldn't open file " . $file . "!\n";
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return 0;
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}
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}
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sub get_pcc_field {
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my($field) = @_;
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my($file) = $config->{'pcc_path'} . "/" . $power_state . "_" . $field;
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return read_file($file);
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}
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sub set_pcc_field {
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my($field, $contents) = @_;
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my($file) = $config->{'pcc_path'} . "/" . $power_state . "_" . $field;
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if(!write_file($file, $contents)) {
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print "Couldn't set pcc " . $field . " field (are you root?)\n";
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return 0;
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}
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return 1;
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}
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sub ac_disconnect {
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$power_state = "dc";
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set_pcc_field("brightness", get_pcc_field("brightness"));
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}
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sub ac_connect {
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$power_state = "ac";
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set_pcc_field("brightness", get_pcc_field("brightness"));
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}
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my($key) = $ARGV[3];
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my(%dispatch) = (
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"00000000" => \&ac_disconnect,
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"00000001" => \&ac_connect,
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);
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$config = {
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"pcc_path" => "/proc/acpi/pcc",
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};
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$dispatch{$key}();
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