debug3("channel_close_fds: channel %d: r %d w %d e %d", c->self, c->rfd, c->wfd, c->efd);
channel_close_fds(Channel *c){	if (c->sock != -1) {		close(c->sock);		c->sock = -1;	}	if (c->rfd != -1) {		close(c->rfd);		c->rfd = -1;	}	if (c->wfd != -1) {		close(c->wfd);		c->wfd = -1;	}	if (c->efd != -1) {		close(c->efd);		c->efd = -1;	}}