+ memset(&ep_udev, 0, sizeof(struct epoll_event));
+ ep_udev.events = EPOLLIN;
+ ep_udev.data.fd = fd_udev;
+ if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_udev, &ep_udev) < 0) {
+ printf("fail to add fd to epoll: %m\n");
+ goto out;
+ }
+
+ memset(&ep_stdin, 0, sizeof(struct epoll_event));
+ ep_stdin.events = EPOLLIN;
+ ep_stdin.data.fd = STDIN_FILENO;
+ if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, STDIN_FILENO, &ep_stdin) < 0) {
+ printf("fail to add fd to epoll: %m\n");
+ goto out;
+ }