#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

int main()
{
    unsigned int chargelim = 80;
    unsigned int charge = 100;

    unsigned int voltagelim = 210;
    unsigned int voltage = 240;


    FILE *fp;
    char path[1024];

    while(charge > chargelim || voltage > voltagelim)
    {
        sleep(20);
        fp = popen("/usr/bin/upsc ups@{domain} battery.charge 2>&1 |grep -v 'Init SSL'", "r");

        if(fgets(path, sizeof(path), fp) != NULL) 
        {
            charge = atoi(path);
            pclose(fp);
        } 
        else
        {
            pclose(fp);
            system("poweroff");
        }

        fp = popen("/usr/bin/upsc ups@{domain} input.voltage 2>&1 |grep -v 'Init SSL'", "r");

        if(fgets(path, sizeof(path), fp) != NULL) 
        {
            voltage = atoi(path);
            pclose(fp);
        } 
        else
        {
            pclose(fp);
            system("poweroff");
        }
    }

    system("poweroff");

   return 0; 
}