void b_main_sink(char * data);void _main(){char * data;char data_buf[100]="";data=data_buf;strcpy(data, BAD_OS_COMMAND);b_main_sink(data);}void c_main_sink(char * data);void b_main_sink(char * data){c_main_sink(data);}void c_main_sink(char * data){system(data);}
void b_main_sink(char * data);static void main(){char * data;char data_buf[100]="";data=data_buf;strcpy(data, GOOD_OS_COMMAND);b_main_sink(data);}void c_main_sink(char * data);void b_main_sink(char * data){c_main_sink(data);}void c_main_sink(char * data){system(data);}