336 				p_err("duplicated argument: %s", *argv);  in do_show()
342 			p_err("expected no more arguments, 'effective', got: '%s'?",  in do_show()
350 		p_err("can't open cgroup %s", path);  in do_show()
356 		p_err("can't query bpf programs attached to %s: %s",  in do_show()
412 		p_err("can't open cgroup %s: %s", fpath, strerror(errno));  in do_show_tree_fn()
418 		p_err("can't query bpf programs attached to %s: %s",  in do_show_tree_fn()
487 			p_err("cgroup v2 isn't mounted");  in do_show_tree()
497 					p_err("duplicated argument: %s", *argv);  in do_show_tree()
503 				p_err("expected no more arguments, 'effective', got: '%s'?",  in do_show_tree()
525 		p_err("can't iterate over %s: %s", cgroup_root,  in do_show_tree()
553 		p_err("too few parameters for cgroup attach");  in do_attach()
559 		p_err("can't open cgroup %s", argv[0]);  in do_attach()
565 		p_err("invalid attach type");  in do_attach()
581 			p_err("unknown option: %s", argv[i]);  in do_attach()
587 		p_err("failed to attach program");  in do_attach()
611 		p_err("too few parameters for cgroup detach");  in do_detach()
617 		p_err("can't open cgroup %s", argv[0]);  in do_detach()
623 		p_err("invalid attach type");  in do_detach()
634 		p_err("failed to detach program");  in do_detach()