238 channel_register_fds(Channel *c, int rfd, int wfd, int efd,  in channel_register_fds()  argument
244 	channel_max_fd = MAX(channel_max_fd, efd);  in channel_register_fds()
250 	if (efd != -1 && efd != rfd && efd != wfd)  in channel_register_fds()
251 		fcntl(efd, F_SETFD, FD_CLOEXEC);  in channel_register_fds()
256 	c->efd = efd;  in channel_register_fds()
272 		if (efd != -1)  in channel_register_fds()
273 			set_nonblock(efd);  in channel_register_fds()
282 channel_new(char *ctype, int type, int rfd, int wfd, int efd,  in channel_new()  argument
327 	channel_register_fds(c, rfd, wfd, efd, extusage, nonblock, 0);  in channel_new()
372 			max = MAX(max, c->efd);  in channel_find_maxfd()
399 	channel_close_fd(&c->efd);  in channel_close_fds()
788 channel_set_fds(int id, int rfd, int wfd, int efd,  in channel_set_fds()  argument
795 	channel_register_fds(c, rfd, wfd, efd, extusage, nonblock, is_tty);  in channel_set_fds()
857 				    c->self, c->efd, buffer_len(&c->extended));  in channel_pre_open()
863 	if (compat20 && c->efd != -1 &&   in channel_pre_open()
867 			FD_SET(c->efd, writeset);  in channel_pre_open()
868 		else if (c->efd != -1 && !(c->flags & CHAN_EOF_SENT) &&  in channel_pre_open()
872 			FD_SET(c->efd, readset);  in channel_pre_open()
1795 	if (c->efd != -1) {
1797 		    FD_ISSET(c->efd, writeset) &&
1799 			len = write(c->efd, buffer_ptr(&c->extended),
1802 			    c->self, len, c->efd);
1808 				    c->self, c->efd);
1809 				channel_close_fd(&c->efd);
1814 		} else if (c->efd != -1 &&
1817 		    (c->detach_close || FD_ISSET(c->efd, readset))) {
1818 			len = read(c->efd, buf, sizeof(buf));
1820 			    c->self, len, c->efd);
1826 				    c->self, c->efd);
1827 				channel_close_fd(&c->efd);
2316 				    c->self, c->efd, buffer_len(&c->extended));
2436 	if (c->efd == -1 ||