bpf_map_get_fd_by_id
err = bpf_map_get_fd_by_id(&attr);
map_fd = bpf_map_get_fd_by_id(map_ids[i]);
fd = bpf_map_get_fd_by_id(id);
fd = bpf_map_get_fd_by_id(id);
LIBBPF_API int bpf_map_get_fd_by_id(__u32 id);
map_fd = bpf_map_get_fd_by_id(map_id);
diff_map_fd = bpf_map_get_fd_by_id(entry.diff_map_id);
inner_map_fd = bpf_map_get_fd_by_id(outer_map_value);
map_fd = bpf_map_get_fd_by_id(map_ids[i]);
map_fd = bpf_map_get_fd_by_id(next_id);
err = bpf_map_get_fd_by_id(0);
fd = bpf_map_get_fd_by_id(id);
inner_fd = bpf_map_get_fd_by_id(value);
fd = bpf_map_get_fd_by_id(info_m.id);
tmp_fd = bpf_map_get_fd_by_id(data_map_id);
tmp_fd = bpf_map_get_fd_by_id(data_map_id);
ASSERT_EQ(bpf_map_get_fd_by_id(map_info.id), -EPERM, "map_get_fd_by_id_fails");
fd = bpf_map_get_fd_by_id(id);
err = bpf_map_get_fd_by_id(map_ids[i]);