19 #define pr_err(fmt, ...) \  macro
39 		return pr_err("fork");  in main()
43 			return pr_err("unshare");  in main()
52 		return pr_err("Unable to read from pipe");  in main()
58 		return pr_err("Unable to open %s", path);  in main()
62 		return pr_err("Unable to get an owning user namespace");  in main()
65 		return pr_err("fstat");  in main()
69 		return pr_err("stat");  in main()
72 		return pr_err("NS_GET_USERNS returned a wrong namespace");  in main()
76 		return pr_err("Unable to get an owning user namespace");  in main()
79 		return pr_err("Don't get EPERM");  in main()
82 		return pr_err("unshare");  in main()
85 		return pr_err("Don't get EPERM");  in main()
87 		return pr_err("Don't get EPERM");  in main()