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 the setreuid() feature, verifying the role of the saved-set-uid 23 * and setreuid's effect on it. 24 */ 25 26 #include <errno.h> 27 #include <pwd.h> 28 #include <stdlib.h> 29 #include <sys/wait.h> 30 31 #include "test.h" 32 #include "compat_16.h" 33 34 TCID_DEFINE(setreuid05); 35 36 static int fail = -1; 37 static int pass; 38 static uid_t neg_one = -1; 39 40 static struct passwd nobody, daemonpw, root, bin; 41 42 struct test_data_t { 43 uid_t *real_uid; 44 uid_t *eff_uid; 45 int *exp_ret; 46 struct passwd *exp_real_usr; 47 struct passwd *exp_eff_usr; 48 char *test_msg; 49 } test_data[] = { 50 { 51 &nobody.pw_uid, &root.pw_uid, &pass, &nobody, &root, "Initially"}, { 52 &neg_one, &nobody.pw_uid, &pass, &nobody, &nobody, 53 "After setreuid(-1, nobody),"}, { 54 &neg_one, &root.pw_uid, &pass, &nobody, &root, 55 "After setreuid(-1, root),"}, { 56 &daemonpw.pw_uid, &neg_one, &pass, &daemonpw, &root, 57 "After setreuid(daemon, -1),"}, { 58 &neg_one, &bin.pw_uid, &pass, &daemonpw, &bin, 59 "After setreuid(-1, bin),"}, { 60 &neg_one, &root.pw_uid, &fail, &daemonpw, &bin, 61 "After setreuid(-1, root),"}, { 62 &neg_one, &nobody.pw_uid, &fail, &daemonpw, &bin, 63 "After setreuid(-1, nobody),"}, { 64 &neg_one, &daemonpw.pw_uid, &pass, &daemonpw, &daemonpw, 65 "After setreuid(-1, daemon),"}, { 66 &neg_one, &bin.pw_uid, &pass, &daemonpw, &bin, 67 "After setreuid(-1, bin),"}, { 68 &bin.pw_uid, &daemonpw.pw_uid, &pass, &bin, &daemonpw, 69 "After setreuid(bin, daemon),"}, { 70 &neg_one, &bin.pw_uid, &pass, &bin, &bin, "After setreuid(-1, bin),"}, 71 { 72 &neg_one, &daemonpw.pw_uid, &pass, &bin, &daemonpw, 73 "After setreuid(-1, daemon),"}, { 74 &daemonpw.pw_uid, &neg_one, &pass, &daemonpw, &daemonpw, 75 "After setreuid(daemon, -1),"}, { 76 &neg_one, &bin.pw_uid, &fail, &daemonpw, &daemonpw, 77 "After setreuid(-1, bin),"},}; 78 79 int TST_TOTAL = ARRAY_SIZE(test_data); 80 81 static void setup(void); 82 static void cleanup(void); 83 static void uid_verify(struct passwd *, struct passwd *, char *); 84 85 int main(int argc, char **argv) 86 { 87 int lc; 88 89 tst_parse_opts(argc, argv, NULL, NULL); 90 91 setup(); 92 93 pass = 0; 94 95 for (lc = 0; TEST_LOOPING(lc); lc++) { 96 int i, pid; 97 98 tst_count = 0; 99 100 if ((pid = FORK_OR_VFORK()) == -1) { 101 tst_brkm(TBROK, cleanup, "fork failed"); 102 } else if (pid == 0) { /* child */ 103 for (i = 0; i < TST_TOTAL; i++) { 104 /* Set the real or effective user id */ 105 TEST(SETREUID(cleanup, *test_data[i].real_uid, 106 *test_data[i].eff_uid)); 107 108 if (TEST_RETURN == *test_data[i].exp_ret) { 109 if (TEST_RETURN == neg_one) { 110 if (TEST_ERRNO != EPERM) { 111 tst_resm(TFAIL, 112 "setreuid(%d, %d) " 113 "did not set errno " 114 "value as expected.", 115 *test_data 116 [i].real_uid, 117 *test_data 118 [i].eff_uid); 119 continue; 120 } 121 tst_resm(TPASS, 122 "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, 128 "setreuid(%d, %d) " 129 "succeeded as expected.", 130 *test_data[i].real_uid, 131 *test_data[i].eff_uid); 132 } 133 } else { 134 tst_resm(TFAIL, "setreuid(%d, %d) " 135 "did not return as expected.", 136 *test_data[i].real_uid, 137 *test_data[i].eff_uid); 138 } 139 140 if (TEST_RETURN == -1) { 141 } 142 uid_verify(test_data[i].exp_real_usr, 143 test_data[i].exp_eff_usr, 144 test_data[i].test_msg); 145 } 146 tst_exit(); 147 } else { /* parent */ 148 tst_record_childstatus(cleanup, pid); 149 } 150 } 151 cleanup(); 152 tst_exit(); 153 } 154 155 static void setup(void) 156 { 157 tst_require_root(); 158 159 tst_sig(FORK, DEF_HANDLER, cleanup); 160 161 if (getpwnam("nobody") == NULL) 162 tst_brkm(TBROK, NULL, "nobody must be a valid user."); 163 164 if (getpwnam("daemon") == NULL) 165 tst_brkm(TBROK, NULL, "daemon must be a valid user."); 166 167 if (getpwnam("bin") == NULL) 168 tst_brkm(TBROK, NULL, "bin must be a valid user."); 169 170 nobody = *(getpwnam("nobody")); 171 UID16_CHECK(nobody.pw_uid, setreuid, cleanup); 172 173 daemonpw = *(getpwnam("daemon")); 174 UID16_CHECK(daemonpw.pw_uid, setreuid, cleanup); 175 176 root = *(getpwnam("root")); 177 UID16_CHECK(root.pw_uid, setreuid, cleanup); 178 179 bin = *(getpwnam("bin")); 180 UID16_CHECK(bin.pw_uid, setreuid, cleanup); 181 182 TEST_PAUSE; 183 } 184 185 static void cleanup(void) 186 { 187 } 188 189 static void uid_verify(struct passwd *ru, struct passwd *eu, char *when) 190 { 191 if ((getuid() != ru->pw_uid) || (geteuid() != eu->pw_uid)) { 192 tst_resm(TFAIL, "ERROR: %s real uid = %d; effective uid = %d", 193 when, getuid(), geteuid()); 194 tst_resm(TINFO, "Expected: real uid = %d; effective uid = %d", 195 ru->pw_uid, eu->pw_uid); 196 } 197 } 198
