Function with_socketpair

lib_fiber/samples-c/test/kqueue_hook/main.c:58–69

}

static int with_socketpair(void (*fn)(int, int))
{
	int fds[2];
	if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds) < 0) {
		fail("socketpair failed");
		return -1;
	}
	fn(fds[0], fds[1]);
	close(fds[0]);
	close(fds[1]);
	return 0;
}

static void drain_read(int fd)
{