func: void bad() wchar_t * data ; wchar_t dataBuffer [ FILENAME_MAX ] = L "" data = dataBuffer; data = badSource ( data ); wchar_t * badSource(wchar_t * data) if ( badGlobal )  size_t dataLen = wcslen ( data ) ; wchar_t * environment = GETENV ( ENV_VARIABLE ) ; if ( environment != NULL )  wcsncat ( data + dataLen , environment , FILENAME_MAX - dataLen - 1 ); return data ; 