67 int parent_pipe[2];  variable
108 	if (pipe(parent_pipe) < 0) {  in setup()
181 	close(parent_pipe[0]);  in do_child1()
213 	close(parent_pipe[0]);  in do_child2()
251 	close(parent_pipe[0]);  in do_child3()
352 	if (write(parent_pipe[1], &arg, sizeof(arg)) != sizeof(arg)) {  in parent_free()
362 	if (read(parent_pipe[0], &arg, sizeof(arg)) != sizeof(arg)) {  in parent_wait()
443 			&parent_pipe[0], &parent_pipe[1],  in main()
448 			&parent_pipe[0], &parent_pipe[1],  in main()
453 			&parent_pipe[0], &parent_pipe[1],  in main()
473 				      parent_pipe[0], parent_pipe[1],  in main()
491 				      parent_pipe[0], parent_pipe[1],  in main()
510 				      parent_pipe[0], parent_pipe[1],  in main()
526 		close(parent_pipe[1]);  in main()