oshi.hardware.platform.linux.LinuxSensors Maven / Gradle / Ivy
/**
* Oshi (https://github.com/dblock/oshi)
*
* Copyright (c) 2010 - 2016 The Oshi Project Team
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Maintainers:
* dblock[at]dblock[dot]org
* widdis[at]gmail[dot]com
* enrico.bianchi[at]gmail[dot]com
*
* Contributors:
* https://github.com/dblock/oshi/graphs/contributors
*/
package oshi.hardware.platform.linux;
import java.io.File;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import oshi.hardware.Sensors;
import oshi.util.FileUtil;
public class LinuxSensors implements Sensors {
private static final long serialVersionUID = 1L;
// Possible sensor types. See sysfs documentation for others, e.g. current
private static final String TEMP = "temp";
private static final String FAN = "fan";
private static final String VOLTAGE = "in";
private static final String[] SENSORS = { TEMP, FAN, VOLTAGE };
// Base HWMON path, adds 0, 1, etc. to end for various sensors
private static final String HWMON = "/sys/class/hwmon/hwmon";
// Map from sensor to path
private Map hwmonMap = new HashMap<>();
public LinuxSensors() {
// Iterate over all hwmon* directories and look for sensor files
// e.g. /sys/class/hwmon/hwmon0/temp1_input
int i = 0;
while (Files.isDirectory(Paths.get(HWMON + i))) {
for (String sensor : SENSORS) {
String path = HWMON + i;
// Final to pass to anonymous class
final String prefix = sensor;
// Find any *_input files in that path
File dir = new File(path);
File[] matchingFiles = dir
.listFiles(f -> f.getName().startsWith(prefix) && f.getName().endsWith("_input"));
if (matchingFiles != null && matchingFiles.length > 0) {
this.hwmonMap.put(sensor, String.format("%s/%s", path, sensor));
}
}
i++;
}
}
/**
* {@inheritDoc}
*/
@Override
public double getCpuTemperature() {
if (!this.hwmonMap.containsKey(TEMP)) {
return 0d;
}
String hwmon = this.hwmonMap.get(TEMP);
// First attempt should be CPU temperature at index 1, if available
long millidegrees = FileUtil.getLongFromFile(String.format("%s1_input", hwmon));
// Should return a single line of millidegrees Celsius
if (millidegrees > 0) {
return millidegrees / 1000d;
}
// If temp1_input doesn't exist, iterate over temp2..temp6_input
// and average
int sum = 0;
int count = 0;
for (int i = 2; i <= 6; i++) {
millidegrees = FileUtil.getLongFromFile(String.format("%s%d_input", hwmon, i));
if (millidegrees > 0) {
sum += millidegrees;
count++;
}
}
if (count > 0) {
return sum / (count * 1000d);
}
return 0d;
}
/**
* {@inheritDoc}
*/
@Override
public int[] getFanSpeeds() {
if (this.hwmonMap.containsKey(FAN)) {
String hwmon = this.hwmonMap.get(FAN);
List speeds = new ArrayList<>();
int fan = 1;
for (;;) {
String fanPath = String.format("%s%d_input", hwmon, fan);
if (!new File(fanPath).exists()) {
// No file found, we've reached max fans
break;
}
// Should return a single line of RPM
speeds.add(FileUtil.getIntFromFile(fanPath));
// Done reading data for current fan, read next fan
fan++;
}
int[] fanSpeeds = new int[speeds.size()];
for (int i = 0; i < speeds.size(); i++) {
fanSpeeds[i] = speeds.get(i);
}
return fanSpeeds;
}
return new int[0];
}
/**
* {@inheritDoc}
*/
@Override
public double getCpuVoltage() {
if (this.hwmonMap.containsKey(VOLTAGE)) {
String hwmon = this.hwmonMap.get(VOLTAGE);
// Should return a single line of millidegrees Celsius
return FileUtil.getIntFromFile(String.format("%s1_input", hwmon)) / 1000d;
}
return 0d;
}
}