1 /* 2 * 3 * Copyright (c) International Business Machines Corp., 2001 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 13 * the GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 18 * 19 * Ported by John George 20 */ 21 22 /* 23 * Test setreuid() when executed by an unpriviledged user. 24 */ 25 26 #include <errno.h> 27 #include <pwd.h> 28 #include <stdlib.h> 29 30 #include "test.h" 31 #include "compat_16.h" 32 33 #define FAILED 1 34 35 TCID_DEFINE(setreuid03); 36 37 static int fail = -1; 38 static int pass; 39 static uid_t neg_one = -1; 40 41 static struct passwd nobody, bin, root; 42 43 /* 44 * The following structure contains all test data. Each structure in the array 45 * is used for a separate test. The tests are executed in the for loop below. 46 */ 47 48 static struct test_data_t { 49 uid_t *real_uid; 50 uid_t *eff_uid; 51 int *exp_ret; 52 struct passwd *exp_real_usr; 53 struct passwd *exp_eff_usr; 54 char *test_msg; 55 } test_data[] = { 56 { 57 &nobody.pw_uid, &nobody.pw_uid, &pass, &nobody, &nobody, 58 "After setreuid(nobody, nobody),"}, { 59 &neg_one, &nobody.pw_uid, &pass, &nobody, &nobody, 60 "After setreuid(-1, nobody),"}, { 61 &nobody.pw_uid, &neg_one, &pass, &nobody, &nobody, 62 "After setreuid(nobody, -1),"}, { 63 &neg_one, &neg_one, &pass, &nobody, &nobody, "After setreuid(-1, -1),"}, 64 { 65 &neg_one, &root.pw_uid, &fail, &nobody, &nobody, 66 "After setreuid(-1, root),"}, { 67 &root.pw_uid, &neg_one, &fail, &nobody, &nobody, 68 "After setreuid(root, -1),"}, { 69 &root.pw_uid, &root.pw_uid, &fail, &nobody, &nobody, 70 "After setreuid(root, root),"}, { 71 &root.pw_uid, &nobody.pw_uid, &fail, &nobody, &nobody, 72 "After setreuid(root, nobody),"}, { 73 &root.pw_uid, &bin.pw_uid, &fail, &nobody, &nobody, 74 "After setreuid(root, nobody),"}, { 75 &bin.pw_uid, &root.pw_uid, &fail, &nobody, &nobody, 76 "After setreuid(bin, root),"}, { 77 &bin.pw_uid, &neg_one, &fail, &nobody, &nobody, 78 "After setreuid(bin, -1),"}, { 79 &bin.pw_uid, &bin.pw_uid, &fail, &nobody, &nobody, 80 "After setreuid(bin, bin,),"}, { 81 &bin.pw_uid, &nobody.pw_uid, &fail, &nobody, &nobody, 82 "After setreuid(bin, nobody),"}, { 83 &nobody.pw_uid, &bin.pw_uid, &fail, &nobody, &nobody, 84 "After setreuid(nobody, bin),"},}; 85 86 int TST_TOTAL = ARRAY_SIZE(test_data); 87 88 static void setup(void); 89 static void cleanup(void); 90 static void uid_verify(struct passwd *, struct passwd *, char *); 91 92 int main(int ac, char **av) 93 { 94 int lc; 95 96 tst_parse_opts(ac, av, NULL, NULL); 97 98 setup(); 99 100 for (lc = 0; TEST_LOOPING(lc); lc++) { 101 int i; 102 103 tst_count = 0; 104 105 for (i = 0; i < TST_TOTAL; i++) { 106 107 /* Set the real or effective user id */ 108 TEST(SETREUID(cleanup, *test_data[i].real_uid, 109 *test_data[i].eff_uid)); 110 111 if (TEST_RETURN == *test_data[i].exp_ret) { 112 if (TEST_RETURN == neg_one) { 113 if (TEST_ERRNO != EPERM) { 114 tst_resm(TFAIL, 115 "setreuid(%d, %d) " 116 "did not set errno " 117 "value as expected.", 118 *test_data[i].real_uid, 119 *test_data[i].eff_uid); 120 continue; 121 } 122 tst_resm(TPASS, "setreuid(%d, %d) " 123 "failed as expected.", 124 *test_data[i].real_uid, 125 *test_data[i].eff_uid); 126 } else { 127 tst_resm(TPASS, "setreuid(%d, %d) " 128 "succeeded as expected.", 129 *test_data[i].real_uid, 130 *test_data[i].eff_uid); 131 } 132 } else { 133 tst_resm(TFAIL, "setreuid(%d, %d) " 134 "did not return as expected.", 135 *test_data[i].real_uid, 136 *test_data[i].eff_uid); 137 } 138 139 if (TEST_RETURN == -1) { 140 } 141 uid_verify(test_data[i].exp_real_usr, 142 test_data[i].exp_eff_usr, 143 test_data[i].test_msg); 144 } 145 } 146 147 cleanup(); 148 tst_exit(); 149 } 150 151 static void setup(void) 152 { 153 tst_require_root(); 154 155 tst_sig(FORK, DEF_HANDLER, cleanup); 156 157 if (getpwnam("nobody") == NULL) 158 tst_brkm(TBROK, NULL, "nobody must be a valid user."); 159 160 if (getpwnam("bin") == NULL) 161 tst_brkm(TBROK, NULL, "bin must be a valid user."); 162 163 root = *(getpwnam("root")); 164 UID16_CHECK(root.pw_uid, setreuid, cleanup); 165 166 nobody = *(getpwnam("nobody")); 167 UID16_CHECK(nobody.pw_uid, setreuid, cleanup); 168 169 bin = *(getpwnam("bin")); 170 UID16_CHECK(bin.pw_uid, setreuid, cleanup); 171 172 if (setuid(nobody.pw_uid) < 0) 173 tst_brkm(TBROK | TERRNO, NULL, "setuid() to nobody failed"); 174 175 TEST_PAUSE; 176 } 177 178 static void cleanup(void) 179 { 180 } 181 182 static void uid_verify(struct passwd *ru, struct passwd *eu, char *when) 183 { 184 if ((getuid() != ru->pw_uid) || (geteuid() != eu->pw_uid)) { 185 tst_resm(TFAIL, "ERROR: %s real uid = %d; effective uid = %d", 186 when, getuid(), geteuid()); 187 tst_resm(TINFO, "Expected: real uid = %d; effective uid = %d", 188 ru->pw_uid, eu->pw_uid); 189 } 190 } 191
