Look what I found!

This is a code snippet that presents so many fiendish possibilities!

Muahahahahah! 

Found here.

- (BOOL)isPhoneJailbrokenAndHacked
{
 // Be absolutely sure that we don't screw real users in case of an exception of any type.  We always return NO in catch block.
 @try
 {
  // Grab a reference to the defaultManager
  NSFileManager *fileMan = [NSFileManager defaultManager];
  
  // Get the path to the MobileInstallation file that gets modded to allow illegal apps on the iPhone
  NSString *filePath = @"/System/Library/PrivateFrameworks/MobileInstallation.framework/MobileInstallation";
  
  // Make sure the file exists
  BOOL fileExists = [fileMan fileExistsAtPath:filePath];
  
  if(fileExists)
  {
   // Grab the file attributes
   NSDictionary *fileAttributes = [fileMan fileAttributesAtPath:filePath traverseLink:YES];
   
   // Grab the NSFilePosixPermissions and make sure they are 493.  If it isn't 493 it's probably hacked.
   int posixPermission = [[fileAttributes objectForKey:NSFilePosixPermissions] intValue];
   
   if(posixPermission != 493)
    return YES;
  }
 }
 @catch (NSError *error)
 {
  return NO;
 }
 
 return NO;
}