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 20 /* 21 * Test Name: getresuid02 22 * 23 * Test Description: 24 * Verify that getresuid() will be successful to get the real, effective 25 * and saved user ids after calling process invokes setreuid() to change 26 * the effective/saved uids to that of specified user. 27 * $ 28 * Expected Result: 29 * getresuid() should return with 0 value and the real/effective/saved 30 * user ids should match the expected values. 31 * 32 * Algorithm: 33 * Setup: 34 * Setup signal handling. 35 * Pause for SIGUSR1 if option specified. 36 * 37 * Test: 38 * Loop if the proper options are given. 39 * Execute system call 40 * Check return code, if system call failed (return=-1) 41 * Log the errno and Issue a FAIL message. 42 * Otherwise, 43 * Verify the Functionality of system call 44 * if successful, 45 * Issue Functionality-Pass message. 46 * Otherwise, 47 * Issue Functionality-Fail message. 48 * Cleanup: 49 * Print errno log and/or timing stats if options given 50 * 51 * Usage: <for command-line> 52 * getresuid02 [-c n] [-f] [-i n] [-I x] [-P x] [-t] 53 * where, -c n : Run n copies concurrently. 54 * -f : Turn off functionality Testing. 55 * -i n : Execute test n times. 56 * -I x : Execute test for x seconds. 57 * -P x : Pause for x seconds between iterations. 58 * -t : Turn on syscall timing. 59 * 60 * HISTORY 61 * 07/2001 Ported by Wayne Boyer 62 * 63 * RESTRICTIONS: 64 * This test should be run by 'super-user' (root) only. 65 * 66 */ 67 68 #include <stdio.h> 69 #include <unistd.h> 70 #include <sys/types.h> 71 #include <errno.h> 72 #include <fcntl.h> 73 #include <string.h> 74 #include <signal.h> 75 #include <pwd.h> 76 77 #include "test.h" 78 79 #define LTPUSER "nobody" 80 81 extern int getresuid(uid_t *, uid_t *, uid_t *); 82 83 char *TCID = "getresuid02"; 84 int TST_TOTAL = 1; 85 uid_t pr_uid, pe_uid, ps_uid; /* calling process real/effective/saved uid */ 86 87 void setup(); /* Main setup function of test */ 88 void cleanup(); /* cleanup function for the test */ 89 90 int main(int ac, char **av) 91 { 92 int lc; 93 uid_t real_uid, /* real/eff./saved user id from getresuid() */ 94 eff_uid, sav_uid; 95 96 tst_parse_opts(ac, av, NULL, NULL); 97 98 setup(); 99 100 for (lc = 0; TEST_LOOPING(lc); lc++) { 101 102 tst_count = 0; 103 104 /* 105 * Call getresuid() to get the real/effective/saved 106 * user id's of the calling process after 107 * setreuid() in setup. 108 */ 109 TEST(getresuid(&real_uid, &eff_uid, &sav_uid)); 110 111 if (TEST_RETURN == -1) { 112 tst_resm(TFAIL, "getresuid() Failed, errno=%d : %s", 113 TEST_ERRNO, strerror(TEST_ERRNO)); 114 continue; 115 } 116 117 if ((real_uid != pr_uid) || (eff_uid != pe_uid) || 118 (sav_uid != ps_uid)) { 119 tst_resm(TFAIL, "real:%d, effective:%d, " 120 "saved-user:%d ids differ", 121 real_uid, eff_uid, sav_uid); 122 } else { 123 tst_resm(TPASS, "Functionality of getresuid() " 124 "successful"); 125 } 126 } 127 128 cleanup(); 129 tst_exit(); 130 } 131 132 /* 133 * void 134 * setup() - performs all ONE TIME setup for this test. 135 * Get the real/effective/saved user id of the calling process. 136 */ 137 void setup(void) 138 { 139 struct passwd *user_id; /* passwd struct for test user */ 140 141 tst_require_root(); 142 143 tst_sig(NOFORK, DEF_HANDLER, cleanup); 144 145 TEST_PAUSE; 146 147 /* Real user-id of the calling process */ 148 pr_uid = getuid(); 149 150 /* Get effective uid of LTPUSER user from passwd file */ 151 if ((user_id = getpwnam(LTPUSER)) == NULL) { 152 tst_brkm(TBROK, cleanup, "getpwnam(%s) Failed", LTPUSER); 153 } 154 155 /* Effective user-id of the test-user LTPUSER */ 156 pe_uid = user_id->pw_uid; 157 158 /* Saved user-id of the test-user LTPUSER */ 159 ps_uid = user_id->pw_uid; 160 161 /* 162 * Set the effective user-id of the process to that of 163 * test user LTPUSER 164 * The real user id remains same as of caller. 165 */ 166 if (setreuid(-1, ps_uid) < 0) { 167 tst_brkm(TBROK, cleanup, 168 "setreuid(-1, %d) Fails, errno:%d : %s", 169 ps_uid, errno, strerror(errno)); 170 } 171 } 172 173 /* 174 * void 175 * cleanup() - performs all ONE TIME cleanup for this test at 176 * completion or premature exit. 177 * Restore the test process uid to root. 178 */ 179 void cleanup(void) 180 { 181 182 /* Reset the effective/saved uid of the calling process */ 183 if (setreuid(-1, pr_uid) < 0) { 184 tst_brkm(TBROK, NULL, "resetting process effective uid failed"); 185 } 186 187 } 188