--- trunk/dwm-status.pl	2007/05/29 11:44:46	38
+++ trunk/dwm-status.pl	2007/06/14 11:56:26	39
@@ -21,6 +21,7 @@
 
 sub proc2hash {
 	my $f = shift;
+	return unless -f $f;
 	open(my $fh, '<', $f) || die "can't open $f: $!";
 	my $h;
 	while(<$fh>) {
@@ -33,6 +34,38 @@
 	return $h;
 }
 
+my $proc_acpi_battery;
+sub find_proc_acpi {
+	my ( $path, $check ) = @_;
+
+	if ( -e "/proc/acpi/$path" ) {
+		opendir(my $items, "/proc/acpi/$path") || die "can't open /proc/acpi/$path: $!";
+		foreach my $item ( readdir( $items ) ) {
+			$check->( $item ) && last;
+		}
+	}
+}
+
+my $proc_acpi_thermal_zone_temperature;
+find_proc_acpi('thermal_zone', sub {
+	my $thm = shift;
+	return if ( ! -e "/proc/acpi/thermal_zone/$thm/temperature" );
+	warn "# using thermal zone $thm\n" if ( $debug );
+	$proc_acpi_thermal_zone_temperature = "/proc/acpi/thermal_zone/$thm/temperature";
+});
+
+find_proc_acpi('battery', sub {
+	my $bat = shift;
+	return unless $bat =~ /BAT/;
+
+	warn "# testing battery $bat\n" if ( $debug );
+
+	if ( proc2hash( "/proc/acpi/battery/$bat/info" )->{present} eq 'yes' ) {
+		$proc_acpi_battery = "/proc/acpi/battery/$bat";
+		warn "using $proc_acpi_battery to monitor battery\n";
+	}
+});
+
 sub unit {
 	my $v = shift;
 
@@ -64,12 +97,12 @@
 while ( 1 ) {
 	my $s = strftime("%Y-%m-%d %H:%M:%S", localtime());
 
-	if ( $i % $acpi_every == 0 ) {
+	if ( $i % $acpi_every == 0 && $proc_acpi_battery ) {
 
-		my $state = proc2hash( '/proc/acpi/battery/BAT0/state' );
+		my $state = proc2hash( "$proc_acpi_battery/state" );
 
 		if ( $state->{'present rate'} != 0 ) {
-			my $info = proc2hash( '/proc/acpi/battery/BAT0/info' );
+			my $info = proc2hash( "$proc_acpi_battery/info" );
 
 			my $pcnt = $state->{'remaining capacity'} / $info->{'design capacity'};
 
@@ -100,9 +133,12 @@
 	chomp( $load );
 	$load =~ s!\s\d+/\d+.*!!;
 
-	my $temp = read_file('/proc/acpi/thermal_zone/THM0/temperature');
-	chomp( $temp );
-	$temp =~ s!^.*:\s+!!;
+	my $temp = '';
+	if ( $proc_acpi_thermal_zone_temperature ) {
+		$temp = read_file( $proc_acpi_thermal_zone_temperature );
+		chomp( $temp );
+		$temp =~ s!^.*:\s+!!;
+	}
 
 	my $net = read_file('/proc/net/dev');
 	my ( $rx, $tx ) = ( 0,0 );