302 				p_err("duplicated argument: %s", *argv);  in do_show()
308 			p_err("expected no more arguments, 'effective', got: '%s'?",  in do_show()
316 		p_err("can't open cgroup %s", path);  in do_show()
322 		p_err("can't query bpf programs attached to %s: %s",  in do_show()
378 		p_err("can't open cgroup %s: %s", fpath, strerror(errno));  in do_show_tree_fn()
384 		p_err("can't query bpf programs attached to %s: %s",  in do_show_tree_fn()
453 			p_err("cgroup v2 isn't mounted");  in do_show_tree()
463 					p_err("duplicated argument: %s", *argv);  in do_show_tree()
469 				p_err("expected no more arguments, 'effective', got: '%s'?",  in do_show_tree()
491 		p_err("can't iterate over %s: %s", cgroup_root,  in do_show_tree()
519 		p_err("too few parameters for cgroup attach");  in do_attach()
525 		p_err("can't open cgroup %s", argv[0]);  in do_attach()
531 		p_err("invalid attach type");  in do_attach()
547 			p_err("unknown option: %s", argv[i]);  in do_attach()
553 		p_err("failed to attach program");  in do_attach()
577 		p_err("too few parameters for cgroup detach");  in do_detach()
583 		p_err("can't open cgroup %s", argv[0]);  in do_detach()
589 		p_err("invalid attach type");  in do_detach()
600 		p_err("failed to detach program");  in do_detach()