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//Chris Xiong 2018
//3-Clause BSD License
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <algorithm>
#include <condition_variable>
#include <chrono>
#include <functional>
#include <mutex>
#include <thread>
#include <vector>
#include <signal.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include "utils.hpp"
#include "sensor_als.hpp"
#include "brightness_ctrl.hpp"
SensorALS als;
int als_id;
bool manualmode;
filesystem::path fifo_path;
BrightnessControl lcd,kbd;
FILE *fifo_f;
void als_callback(SensorBase* _s)
{
SensorALS* s=(SensorALS*)_s;
float val=s->get_value();
lcd.on_sensor_report(val);
kbd.on_sensor_report(val);
}
std::vector<int> numlist2vec(std::string l)
{
std::vector<std::string> v;
split(l,',',v);
std::vector<int> r;
for(auto&i:v)r.push_back(atoi(i.c_str()));
return r;
}
void load_config()
{
fifo_path="/tmp/lightsd.cmd.fifo";
FILE* cfgf;
cfgf=fopen("/etc/lightsd.conf","r");
if(!cfgf)
cfgf=fopen("lightsd.conf","r");
if(!cfgf)return (void)LOG('W',"Configuration file not found.",0);
char* buf=new char[1024];
while(!feof(cfgf))
{
ignore_result(fgets(buf,1024,cfgf));
if(buf[0]=='#')continue;
std::string sb=trim(buf);
std::vector<std::string> sv;
split(sb,'=',sv);
if(sv.size()!=2)continue;
if(sv[0]=="lcd_backlight_control")lcd.set_path(sv[1]);
if(sv[0]=="kbd_backlight_control")kbd.set_path(sv[1]);
if(sv[0]=="lcd_backlight_thresholds")lcd.set_thresh(numlist2vec(sv[1]));
if(sv[0]=="lcd_backlight_values")lcd.set_value(numlist2vec(sv[1]));
if(sv[0]=="lcd_backlight_control_delay")lcd.set_delay(atoi(sv[1].c_str()));
if(sv[0]=="lcd_backlight_trigger_range")lcd.set_trigrange(atoi(sv[1].c_str()));
if(sv[0]=="lcd_backlight_min_value")lcd.set_minabr(atoi(sv[1].c_str()));
if(sv[0]=="kbd_backlight_thresholds")kbd.set_thresh(numlist2vec(sv[1]));
if(sv[0]=="kbd_backlight_values")kbd.set_value(numlist2vec(sv[1]));
if(sv[0]=="kbd_backlight_control_delay")kbd.set_delay(atoi(sv[1].c_str()));
if(sv[0]=="kbd_backlight_trigger_range")kbd.set_trigrange(atoi(sv[1].c_str()));
if(sv[0]=="kbd_backlight_min_value")kbd.set_minabr(atoi(sv[1].c_str()));
if(sv[0]=="command_fifo_path")fifo_path=sv[1];
if(sv[0]=="als_print_value")als.set_debug(sv[1]=="true");
}
delete[] buf;
}
int get_gid(std::string group)
{
FILE* grpf=fopen("/etc/group","r");
char* buf=new char[1024];
while(!feof(grpf))
{
ignore_result(fgets(buf,1024,grpf));
std::vector<std::string> sv;
split(buf,':',sv);
if(sv[0]==group)
{
fclose(grpf);
delete[] buf;
return atoi(sv[2].c_str());
}
}
fclose(grpf);
delete[] buf;
return -1;
}
void cleanup()
{
als.quit_worker();
if(!fifo_path.empty())unlink(fifo_path.c_str());
}
void sighandler(int)
{
if(!fifo_path.empty())//command thread *exists*
{
FILE* tf=fopen(fifo_path.c_str(),"w");
fputs("q\n",tf);
//let the command thread cleanup
fclose(tf);
}
else
cleanup();
}
void setup_fifo()
{
if(fifo_path.empty())return;
int ret=0;
unlink(fifo_path.c_str());
ret|=mkfifo(fifo_path.c_str(),0220);
ret|=chown(fifo_path.c_str(),0,get_gid("video"));
ret|=chmod(fifo_path.c_str(),0220);
if(ret)
{
LOG('W',"Failed to create fifo.",0);
unlink(fifo_path.c_str());
fifo_path="";
}
}
void command_thread()
{
if(fifo_path.empty())return;
fifo_f=fopen(fifo_path.c_str(),"r");
char cmdbuf[256];
while(1)
{
ignore_result(fgets(cmdbuf,256,fifo_f));
LOG('I',"got command: %s",trim(cmdbuf).c_str());
std::vector<std::string> cav;
split(trim(cmdbuf),' ',cav);
if(cav.size()>=1)
{
if(cav[0]=="u")
{
if(cav.size()>1)lcd.set_offset(1,atoi(cav[1].c_str()));
else lcd.set_offset(1,5);
}
if(cav[0]=="d")
{
if(cav.size()>1)lcd.set_offset(-1,atoi(cav[1].c_str()));
else lcd.set_offset(-1,5);
}
if(cav[0]=="s")if(cav.size()>1)lcd.set_offset(0,atoi(cav[1].c_str()));
if(cav[0]=="r"&&!manualmode)lcd.set_offset(0,0);
if(cav[0]=="f"&&!manualmode)
{
lcd.force_adjust();
kbd.force_adjust();
}
if(cav[0]=="m")
if(!manualmode)
{
als.pause_worker();
lcd.set_frozen(true);
kbd.set_frozen(true);
manualmode=true;
}
if(cav[0]=="a")
if(manualmode)
{
manualmode=false;
als.resume_worker();
lcd.set_frozen(false);
kbd.set_frozen(false);
}
if(cav[0]=="i")
{
printf("Mode: %s\n",manualmode?"Manual":"Automatic");
printf(manualmode?"ALS value: --\n":"ALS value: %.2f\n",als.get_value());
printf("Display brightness: %d%%",lcd.get_brightness());
if(!manualmode&&lcd.get_offset())printf(" (+%d%%)\n",lcd.get_offset());else putchar('\n');
//TODO: do not print this if keyboard backlight is not managed
printf("Keyboard backlight: %d%%\n",kbd.get_brightness());
}
if(cav[0]=="q")
{
fclose(fifo_f);
cleanup();
return;
}
}
fclose(fifo_f);
fifo_f=fopen(fifo_path.c_str(),"r");
}
}
int main()
{
signal(SIGTERM,sighandler);
signal(SIGINT,sighandler);
als_id=SensorBase::detect_sensor("als");
if(!~als_id)return puts("No ALS found!"),1;
if(als.init(als_id,"in_intensity"))return puts("Failed to initialize sensor."),1;
als.set_reader_callback(als_callback);
float init_val=als.get_value();
manualmode=false;
load_config();
setup_fifo();
lcd.init(init_val,&als);
kbd.init(init_val,&als);
std::thread (&BrightnessControl::worker,std::ref(lcd)).detach();
std::thread (&BrightnessControl::worker,std::ref(kbd)).detach();
std::thread (command_thread).detach();
als.worker();
_exit(0);
}
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