1#define _GNU_SOURCE
 2#include <sys/types.h>
 3#include <sys/stat.h>
 4#include <fcntl.h>
 5#include <inttypes.h>
 6
 7int main(void)
 8{
 9	struct {
10		struct file_handle fh;
11		uint64_t cgroup_id;
12	} handle;
13	int mount_id;
14
15	name_to_handle_at(AT_FDCWD, "/", &handle.fh, &mount_id, 0);
16	return 0;
17}