314 	size_t nbytes;  in proc_child()  local
349 		nbytes = 0;  in proc_child()
360 			nbytes += ret;  in proc_child()
362 		ret = write(bfd, &nbytes, sizeof(nbytes));  in proc_child()
363 		assert(ret == sizeof(nbytes));  in proc_child()
494 	size_t nbytes;  in proc_parent()  local
564 		nbytes = 0;  in proc_parent()
565 		ret = read(bfd, &nbytes, sizeof(nbytes));  in proc_parent()
566 		assert(ret == sizeof(nbytes));  in proc_parent()
579 				if (nbytes > 0 && retries > 0)  in proc_parent()
585 			assert(nbytes > 0);  in proc_parent()
586 			ret = read(fd, buf, MIN(sizeof(buf), nbytes));  in proc_parent()
588 			nbytes -= ret;  in proc_parent()
590 		assert(nbytes == 0);  in proc_parent()