battlog.m for iPhone

//
// batterylevel
//
// Ver.0.1
// Created by moyashi on 18.01.09.
//

#import <Foundation/Foundation.h>
#import <CoreFoundation/CoreFoundation.h>
#import <IOKit/ps/IOPowerSources.h>
#import <IOKit/ps/IOPSKeys.h>

int main (int argc, char *argv[])
{
  NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
  char str[255];
  id info = (id)IOPSCopyPowerSourcesInfo();

  if (info)
    {
      NSArray *list = (NSArray*)IOPSCopyPowerSourcesList(info);
      if (list)
	{
	  NSDictionary *ups_info = 
	    (NSDictionary*)IOPSGetPowerSourceDescription(info, [list objectAtIndex:0]);
	  if (ups_info)
	    {
	      NSLog(@"%@", ups_info);

	      float currentcap = 
		[[ups_info objectForKey:
			     [NSString stringWithUTF8String:kIOPSCurrentCapacityKey]] floatValue];

	      float maxcap = 
		[[ups_info objectForKey:
			     [NSString stringWithUTF8String:kIOPSMaxCapacityKey]] floatValue];

	      if (currentcap && maxcap)
		{
		  sprintf(str, "echo `date \"+%%Y-%%m-%%d\t%%H:%%M:%%S\"`\t%.1f >>/var/mobile/battery-log/battlog`date +%%Y-%%m-%%d`.txt", currentcap);
		  system("mkdir /var/mobile/battery-log/ >/dev/null 2>&1");
		  system(str);
		}
	    }
	}
    }
	      
  [pool release];

  return 0;
}