#include <fcntl.h>
#include <string.h>
#include <stdio.h>


typedef struct {
        unsigned short  u16BatteryVoltage;               /* battery voltage */
        unsigned short  u16ReferenceVoltage;             /* reference voltage */
        unsigned short  u16ChargeCurrent;                /* charge current */
} BATTERY_STATUS;


#define BATTERY_DRIVER_MAGIC            'B' /* Battery driver magic number */
#define IOR_BATTERY_STATUS                      _IOR(BATTERY_DRIVER_MAGIC, 0, BATTERY_STATUS)
#define IOW_BATTERY_CHARGER_ENABLE      _IO(BATTERY_DRIVER_MAGIC, 1)
#define IOW_BATTERY_CHARGER_DISABLE     _IO(BATTERY_DRIVER_MAGIC, 2)


int main ()
{
  unsigned char buff[1000];
  int fd=open("/dev/battery",O_RDONLY|O_NOCTTY);
  if(fd<0)
  {
    puts("error");
  }
  else
  {
     BATTERY_STATUS bs;
    if(ioctl(fd,IOR_BATTERY_STATUS,&bs))
      puts("error");
    else
    {
      srintf((char*)buff,"BatteryVoltage=%d",bs.u16BatteryVoltage);
      puts(buff);
      sprintf((char*)buff,"ReferenceVoltage=%d",bs.u16ReferenceVoltage);
      puts(buff);
      sprintf((char*)buff,"ChargeCurrent=%d",bs.u16ChargeCurrent);
      puts(buff);
    }
  }
}