* }
*
* static struct io_plan wake_writer(struct io_conn *c, struct stdin_buffer *b)
* {
* assert(c == b->reader);
* io_wake(b->writer, write_to_child, b);
* }
*
* static struct io_plan wake_writer(struct io_conn *c, struct stdin_buffer *b)
* {
* assert(c == b->reader);
* io_wake(b->writer, write_to_child, b);