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main.cpp
125 lines (102 loc) · 2.47 KB
/
main.cpp
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/*
*
* Created on: 07.07.2012
* Author: Tobias Kohlbau <tobias.kohlbau@gmail.com>
*
*/
#include <sys/stat.h>
#include "Fan.h"
#include "Sensor.h"
#include "Load.h"
#define DAEMON_LOG "/var/log/fan.log"
#define FANMINSPEED 4000
//#define FANMAXSPEED 6200
#define LOACSCALEFROM 0.35
#define LOADSCALETO 0.45
#define SENSORSCALEFROM 0.55
#define SENSORSCALETO 0.60
#define AVERAGECOUNT 3
#define SLEEPTIME 2
void logToFile(const char *filename, const char *message) {
FILE *logFile;
logFile = fopen(filename, "a");
if (!logFile) {
return;
}
fprintf(logFile, "%s\n", message);
fclose(logFile);
}
void startDaemon() {
pid_t pid, sid;
if (getppid() == 1) {
return;
}
pid = fork();
if (pid < 0)
exit(EXIT_FAILURE);
if (pid > 0)
exit(EXIT_SUCCESS);
umask(0);
sid = setsid();
if (sid < 0) {
exit(0);
}
if (chdir("/") < 0) {
exit(EXIT_FAILURE);
}
close(STDIN_FILENO);
close(STDOUT_FILENO);
close(STDERR_FILENO);
}
std::string dtos(double d) {
std::stringstream dStream;
dStream << d;
std::string dString = dStream.str();
return (dString);
}
int main() {
startDaemon();
Fan fan("/sys/devices/platform/applesmc.768", "fan1");
Sensor coreOne(
"/sys/devices/platform/applesmc.768/subsystem/devices/coretemp.0",
"temp2");
Sensor coreTwo(
"/sys/devices/platform/applesmc.768/subsystem/devices/coretemp.0",
"temp3");
Load load("/proc", "stat");
fan.writeContent(fan.getPath() + "/" + fan.getName() + "_manual", "1");
#if FANMINSPEED
fan.setFanMinSpeed(FANMINSPEED);
#endif
#if FANMAXSPEED
fan.setFanMaxSpeed(FANMAXSPEED);
#endif
int loadFactor = (fan.getFanMaxSpeed() - fan.getFanMinSpeed())
/ (LOADSCALETO - LOACSCALEFROM);
int sensorFacotor = (fan.getFanMaxSpeed() - fan.getFanMinSpeed())
/ (SENSORSCALETO - SENSORSCALEFROM);
while (1) {
double loadAverage = 0;
double sensorAverage = 0;
for (int i = 0; i < AVERAGECOUNT; i++) {
loadAverage += load.getAverage();
sensorAverage += (coreOne.getTemp() + coreTwo.getTemp());
sleep(SLEEPTIME);
}
loadAverage = loadAverage / AVERAGECOUNT;
sensorAverage = sensorAverage / ((2 * AVERAGECOUNT) * 100000);
logToFile(DAEMON_LOG, dtos(loadAverage).c_str());
logToFile(DAEMON_LOG, dtos(sensorAverage).c_str());
if (loadAverage > LOACSCALEFROM) {
fan.setSpeed(
fan.getFanMinSpeed()
+ loadFactor * (loadAverage - LOACSCALEFROM));
} else {
fan.setSpeed(
fan.getFanMinSpeed()
+ sensorFacotor
* (sensorAverage - SENSORSCALEFROM));
}
}
return (0);
}