1f08c3bdfSopenharmony_ci// SPDX-License-Identifier: GPL-2.0-or-later 2f08c3bdfSopenharmony_ci/* 3f08c3bdfSopenharmony_ci * Copyright (c) International Business Machines Corp., 2001 4f08c3bdfSopenharmony_ci * Copyright (c) Linux Test Project, 2009-2022 5f08c3bdfSopenharmony_ci */ 6f08c3bdfSopenharmony_ci 7f08c3bdfSopenharmony_ci/*\ 8f08c3bdfSopenharmony_ci * [Description] 9f08c3bdfSopenharmony_ci * 10f08c3bdfSopenharmony_ci * This test will switch to nobody user for correct error code collection. 11f08c3bdfSopenharmony_ci * Verify setuid returns errno EPERM when it switches to root_user. 12f08c3bdfSopenharmony_ci */ 13f08c3bdfSopenharmony_ci 14f08c3bdfSopenharmony_ci#include <errno.h> 15f08c3bdfSopenharmony_ci#include <pwd.h> 16f08c3bdfSopenharmony_ci#include <unistd.h> 17f08c3bdfSopenharmony_ci#include <sys/types.h> 18f08c3bdfSopenharmony_ci#include "tst_test.h" 19f08c3bdfSopenharmony_ci#include "compat_tst_16.h" 20f08c3bdfSopenharmony_ci 21f08c3bdfSopenharmony_ci#define ROOT_USER 0 22f08c3bdfSopenharmony_ci 23f08c3bdfSopenharmony_cistatic void verify_setuid(void) 24f08c3bdfSopenharmony_ci{ 25f08c3bdfSopenharmony_ci TST_EXP_FAIL(SETUID(ROOT_USER), EPERM); 26f08c3bdfSopenharmony_ci} 27f08c3bdfSopenharmony_ci 28f08c3bdfSopenharmony_cistatic void setup(void) 29f08c3bdfSopenharmony_ci{ 30f08c3bdfSopenharmony_ci struct passwd *pw; 31f08c3bdfSopenharmony_ci uid_t uid; 32f08c3bdfSopenharmony_ci 33f08c3bdfSopenharmony_ci pw = SAFE_GETPWNAM("nobody"); 34f08c3bdfSopenharmony_ci uid = pw->pw_uid; 35f08c3bdfSopenharmony_ci 36f08c3bdfSopenharmony_ci SAFE_SETUID(uid); 37f08c3bdfSopenharmony_ci 38f08c3bdfSopenharmony_ci umask(0); 39f08c3bdfSopenharmony_ci} 40f08c3bdfSopenharmony_ci 41f08c3bdfSopenharmony_cistatic struct tst_test test = { 42f08c3bdfSopenharmony_ci .setup = setup, 43f08c3bdfSopenharmony_ci .needs_root = 1, 44f08c3bdfSopenharmony_ci .test_all = verify_setuid, 45f08c3bdfSopenharmony_ci}; 46