sensor monitoring compleat, starting on fan control

lm.cpp

@@ -0,0 +1,63 @@
+#include "lm.h"
+
+std::vector<const sensors_chip_name*> lm_get_chips(const std::string& match)
+{
+	std::vector<const sensors_chip_name*> out;
+
+	sensors_chip_name name_glob;
+	int ret = sensors_parse_chip_name(match.c_str(), &name_glob);
+	if(ret < 0)
+	{
+		std::cerr<<"could not parse chip name\n";
+		return out;
+	}
+
+	const sensors_chip_name* s_name;
+	int nr = 0;
+	do
+	{
+		s_name = sensors_get_detected_chips(&name_glob, &nr);
+		if(s_name)
+			out.push_back(s_name);
+	} while(s_name);
+	sensors_free_chip_name(&name_glob);
+
+	return out;
+}
+
+std::vector<Sensor> lm_get_temperatures(std::vector<const sensors_chip_name*>& chips)
+{
+	std::vector<Sensor> out;
+
+	for(const sensors_chip_name* chip : chips)
+	{
+		int nr = 0;
+		const sensors_feature* feature;
+		while((feature = sensors_get_features(chip, &nr)))
+		{
+			if(feature->type != SENSORS_FEATURE_TEMP)
+				continue;
+			const sensors_subfeature* subfeature = sensors_get_subfeature(chip, feature, SENSORS_SUBFEATURE_TEMP_INPUT);
+			if(!subfeature)
+			{
+				std::cerr<<"could not read subfeature\n";
+				continue;
+			}
+
+			double val = 0;
+			int ret = sensors_get_value(chip, subfeature->number, &val);
+			if(ret < 0)
+			{
+				std::cerr<<"unable to read temperature for subfeature "
+					<<subfeature->number<<' '<<subfeature->name<<": "<<sensors_strerror(ret)<<'\n';
+				continue;
+			}
+			Sensor sensor;
+			sensor.name.assign(sensors_get_label(chip, feature));
+			sensor.id = subfeature->number;
+			sensor.reading = val;
+			out.push_back(sensor);
+		}
+	}
+	return out;
+}