1 /* 2 * Copyright (c) International Business Machines Corp., 2001 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 12 * the GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, see <http://www.gnu.org/licenses/>. 16 */ 17 18 /* DESCRIPTION 19 * This test will switch to nobody user for correct error code collection. 20 * Verify setuid returns errno EPERM when it switches to root_user. 21 */ 22 23 #include <errno.h> 24 #include <pwd.h> 25 #include <unistd.h> 26 #include <sys/types.h> 27 #include "tst_test.h" 28 #include "compat_tst_16.h" 29 30 #define ROOT_USER 0 31 32 static void verify_setuid(void) 33 { 34 TEST(SETUID(ROOT_USER)); 35 if (TST_RET != -1) { 36 tst_res(TFAIL | TTERRNO, "setuid() succeeded unexpectedly"); 37 return; 38 } 39 40 if (TST_ERR == EPERM) 41 tst_res(TPASS, "setuid() returned errno EPERM"); 42 else 43 tst_res(TFAIL | TTERRNO, "setuid() returned unexpected errno"); 44 } 45 46 static void setup(void) 47 { 48 struct passwd *pw; 49 uid_t uid; 50 51 pw = SAFE_GETPWNAM("nobody"); 52 uid = pw->pw_uid; 53 54 if (SETUID(uid) == -1) { 55 tst_brk(TBROK, 56 "setuid() failed to set the effective uid to %d", uid); 57 } 58 59 umask(0); 60 } 61 62 static struct tst_test test = { 63 .setup = setup, 64 .needs_root = 1, 65 .test_all = verify_setuid, 66 }; 67
