261 channel_register_fds(Channel *c, int rfd, int wfd, int efd,  in channel_register_fds()  argument
267 	channel_max_fd = MAXIMUM(channel_max_fd, efd);  in channel_register_fds()
273 	if (efd != -1 && efd != rfd && efd != wfd)  in channel_register_fds()
274 		fcntl(efd, F_SETFD, FD_CLOEXEC);  in channel_register_fds()
279 	c->efd = efd;  in channel_register_fds()
295 		if (efd != -1)  in channel_register_fds()
296 			set_nonblock(efd);  in channel_register_fds()
305 channel_new(char *ctype, int type, int rfd, int wfd, int efd,  in channel_new()  argument
350 	channel_register_fds(c, rfd, wfd, efd, extusage, nonblock, 0);  in channel_new()
395 			max = MAXIMUM(max, c->efd);  in channel_find_maxfd()
422 	channel_close_fd(&c->efd);  in channel_close_fds()
855 channel_set_fds(int id, int rfd, int wfd, int efd,  in channel_set_fds()  argument
862 	channel_register_fds(c, rfd, wfd, efd, extusage, nonblock, is_tty);  in channel_set_fds()
924 				    c->self, c->efd, buffer_len(&c->extended));  in channel_pre_open()
930 	if (compat20 && c->efd != -1 &&   in channel_pre_open()
934 			FD_SET(c->efd, writeset);  in channel_pre_open()
935 		else if (c->efd != -1 && !(c->flags & CHAN_EOF_SENT) &&  in channel_pre_open()
939 			FD_SET(c->efd, readset);  in channel_pre_open()
1875 	if (c->efd != -1) {
1877 		    FD_ISSET(c->efd, writeset) &&
1879 			len = write(c->efd, buffer_ptr(&c->extended),
1882 			    c->self, len, c->efd);
1888 				    c->self, c->efd);
1889 				channel_close_fd(&c->efd);
1894 		} else if (c->efd != -1 &&
1897 		    (c->detach_close || FD_ISSET(c->efd, readset))) {
1898 			len = read(c->efd, buf, sizeof(buf));
1900 			    c->self, len, c->efd);
1906 				    c->self, c->efd);
1907 				channel_close_fd(&c->efd);
2396 				    c->self, c->efd, buffer_len(&c->extended));
2798 	if (c->efd == -1 ||