Battery_info.c

#include <stdio.h>

/*
Trivial program that shows BAT_INFO
*/

const char* ENERGY_NOW = "/sys/class/power_supply/BAT0/charge_now";
const char* ENERGY_FULL = "/sys/class/power_supply/BAT0/charge_full";
const char* STATUS = "/sys/class/power_supply/BAT0/status";
const char* NEW = "/sys/class/power_supply/BAT0/charge_full_design";

int main()
{
  int energy_now;
  int energy_full;
  char status[16];
  int new;


  FILE* f = fopen(ENERGY_NOW, "r");
  fscanf(f, "%d", &energy_now);
  fclose(f);


  f = fopen(ENERGY_FULL, "r");
  fscanf(f, "%d", &energy_full);
  fclose(f);

  f = fopen(STATUS, "r");
  fscanf(f, "%s", status);
  fclose(f);

  f = fopen(NEW, "r");
  fscanf(f, "%d", &new);
  fclose(f);

  float cap = (float) energy_now / (float) energy_full * 100;
  float uso = (float) energy_full / (float) new *100;
  printf("Carga de la Bateria a %.0f%% (%s)\n", cap, status);
  printf("Capacidad total por desgaste: %.0f%% \n", uso);
  return 0;
}