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, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 17 * 18 * Ported by John George 19 */ 20 21 /* 22 * Test that root can change the real and effective uid to an 23 * unpriviledged user. 24 */ 25 26 #include <errno.h> 27 #include <stdlib.h> 28 #include <pwd.h> 29 #include <sys/wait.h> 30 31 #include "test.h" 32 #include "compat_16.h" 33 34 TCID_DEFINE(setreuid04); 35 36 static uid_t neg_one = -1; 37 38 static struct passwd nobody, root; 39 40 /* 41 * The following structure contains all test data. Each structure in the array 42 * is used for a separate test. The tests are executed in the for loop below. 43 */ 44 45 struct test_data_t { 46 uid_t *real_uid; 47 uid_t *eff_uid; 48 struct passwd *exp_real_usr; 49 struct passwd *exp_eff_usr; 50 char *test_msg; 51 } test_data[] = { 52 { 53 &neg_one, &neg_one, &root, &root, "After setreuid(-1, nobody),"}, { 54 &nobody.pw_uid, &nobody.pw_uid, &nobody, &nobody, 55 "After setreuid(-1, -1),"},}; 56 57 int TST_TOTAL = ARRAY_SIZE(test_data); 58 59 static void setup(void); 60 static void cleanup(void); 61 static void uid_verify(struct passwd *, struct passwd *, char *); 62 63 int main(int ac, char **av) 64 { 65 int lc; 66 67 tst_parse_opts(ac, av, NULL, NULL); 68 69 setup(); 70 71 for (lc = 0; TEST_LOOPING(lc); lc++) { 72 int i, pid; 73 74 tst_count = 0; 75 76 if ((pid = FORK_OR_VFORK()) == -1) { 77 tst_brkm(TBROK, cleanup, "fork failed"); 78 } else if (pid == 0) { /* child */ 79 80 for (i = 0; i < TST_TOTAL; i++) { 81 82 /* Set the real or effective user id */ 83 TEST(SETREUID(cleanup, *test_data[i].real_uid, 84 *test_data[i].eff_uid)); 85 86 if (TEST_RETURN != -1) { 87 tst_resm(TPASS, "setreuid(%d, %d) " 88 "succeeded as expected.", 89 *test_data[i].real_uid, 90 *test_data[i].eff_uid); 91 } else { 92 tst_resm(TFAIL, "setreuid(%d, %d) " 93 "did not return as expected.", 94 *test_data[i].real_uid, 95 *test_data[i].eff_uid); 96 } 97 98 uid_verify(test_data[i].exp_real_usr, 99 test_data[i].exp_eff_usr, 100 test_data[i].test_msg); 101 } 102 tst_exit(); 103 } else { /* parent */ 104 tst_record_childstatus(cleanup, pid); 105 } 106 } 107 cleanup(); 108 tst_exit(); 109 } 110 111 static void setup(void) 112 { 113 tst_require_root(); 114 115 tst_sig(FORK, DEF_HANDLER, cleanup); 116 117 if (getpwnam("nobody") == NULL) 118 tst_brkm(TBROK, NULL, "nobody must be a valid user."); 119 120 root = *(getpwnam("root")); 121 UID16_CHECK(root.pw_uid, setreuid, cleanup); 122 123 nobody = *(getpwnam("nobody")); 124 UID16_CHECK(nobody.pw_uid, setreuid, cleanup); 125 126 TEST_PAUSE; 127 } 128 129 static void cleanup(void) 130 { 131 } 132 133 static void uid_verify(struct passwd *ru, struct passwd *eu, char *when) 134 { 135 if ((getuid() != ru->pw_uid) || (geteuid() != eu->pw_uid)) { 136 tst_resm(TFAIL, "ERROR: %s real uid = %d; effective uid = %d", 137 when, getuid(), geteuid()); 138 tst_resm(TINFO, "Expected: real uid = %d; effective uid = %d", 139 ru->pw_uid, eu->pw_uid); 140 } 141 } 142
