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// SPDX-License-Identifier: GPL-3.0-or-later
package sensors
import (
"bufio"
"bytes"
"errors"
"fmt"
"strconv"
"strings"
)
type sensorStats struct {
chip string
feature string
subfeature string
value string
}
func (s *sensorStats) String() string {
return fmt.Sprintf("chip:%s feat:%s subfeat:%s value:%s", s.chip, s.feature, s.subfeature, s.value)
}
const (
sensorTypeTemp = "temperature"
sensorTypeVoltage = "voltage"
sensorTypePower = "power"
sensorTypeHumidity = "humidity"
sensorTypeFan = "fan"
sensorTypeCurrent = "current"
sensorTypeEnergy = "energy"
)
const precision = 1000
func (s *Sensors) collect() (map[string]int64, error) {
bs, err := s.exec.sensorsInfo()
if err != nil {
return nil, err
}
if len(bs) == 0 {
return nil, errors.New("empty response from sensors")
}
sensors, err := parseSensors(bs)
if err != nil {
return nil, err
}
if len(sensors) == 0 {
return nil, errors.New("no sensors found")
}
mx := make(map[string]int64)
seen := make(map[string]bool)
for _, sn := range sensors {
// TODO: Most likely we need different values depending on the type of sensor.
if !strings.HasSuffix(sn.subfeature, "_input") {
s.Debugf("skipping non input sensor: '%s'", sn)
continue
}
v, err := strconv.ParseFloat(sn.value, 64)
if err != nil {
s.Debugf("parsing value for sensor '%s': %v", sn, err)
continue
}
if sensorType(sn) == "" {
s.Debugf("can not find type for sensor '%s'", sn)
continue
}
if minVal, maxVal, ok := sensorLimits(sn); ok && (v < minVal || v > maxVal) {
s.Debugf("value outside limits [%d/%d] for sensor '%s'", int64(minVal), int64(maxVal), sn)
continue
}
key := fmt.Sprintf("sensor_chip_%s_feature_%s_subfeature_%s", sn.chip, sn.feature, sn.subfeature)
key = snakeCase(key)
if !s.sensors[key] {
s.sensors[key] = true
s.addSensorChart(sn)
}
seen[key] = true
mx[key] = int64(v * precision)
}
for k := range s.sensors {
if !seen[k] {
delete(s.sensors, k)
s.removeSensorChart(k)
}
}
return mx, nil
}
func snakeCase(n string) string {
return strings.ToLower(strings.ReplaceAll(n, " ", "_"))
}
func sensorLimits(sn sensorStats) (minVal float64, maxVal float64, ok bool) {
switch sensorType(sn) {
case sensorTypeTemp:
return -127, 1000, true
case sensorTypeVoltage:
return -400, 400, true
case sensorTypeCurrent:
return -127, 127, true
case sensorTypeFan:
return 0, 65535, true
default:
return 0, 0, false
}
}
func sensorType(sn sensorStats) string {
switch {
case strings.HasPrefix(sn.subfeature, "temp"):
return sensorTypeTemp
case strings.HasPrefix(sn.subfeature, "in"):
return sensorTypeVoltage
case strings.HasPrefix(sn.subfeature, "power"):
return sensorTypePower
case strings.HasPrefix(sn.subfeature, "humidity"):
return sensorTypeHumidity
case strings.HasPrefix(sn.subfeature, "fan"):
return sensorTypeFan
case strings.HasPrefix(sn.subfeature, "curr"):
return sensorTypeCurrent
case strings.HasPrefix(sn.subfeature, "energy"):
return sensorTypeEnergy
default:
return ""
}
}
func parseSensors(output []byte) ([]sensorStats, error) {
var sensors []sensorStats
sc := bufio.NewScanner(bytes.NewReader(output))
var chip, feat string
for sc.Scan() {
text := sc.Text()
if text == "" {
chip, feat = "", ""
continue
}
switch {
case strings.HasPrefix(text, " ") && chip != "" && feat != "":
parts := strings.Split(text, ":")
if len(parts) != 2 {
continue
}
subfeat, value := strings.TrimSpace(parts[0]), strings.TrimSpace(parts[1])
sensors = append(sensors, sensorStats{
chip: chip,
feature: feat,
subfeature: subfeat,
value: value,
})
case strings.HasSuffix(text, ":") && chip != "":
feat = strings.TrimSpace(strings.TrimSuffix(text, ":"))
default:
chip = text
feat = ""
}
}
return sensors, nil
}
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