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: getresgid03 22 * 23 * Test Description: 24 * Verify that getresgid() will be successful to get the real, effective 25 * and saved user ids after calling process invokes setresgid() to change 26 * the effective gid to that of specified user. 27 * 28 * Expected Result: 29 * getresgid() should return with 0 value and the effective user id 30 * should match the egid of specified user, real/saved user ids should 31 * remain unchanged. 32 * 33 * Algorithm: 34 * Setup: 35 * Setup signal handling. 36 * Pause for SIGUSR1 if option specified. 37 * 38 * Test: 39 * Loop if the proper options are given. 40 * Execute system call 41 * Check return code, if system call failed (return=-1) 42 * Log the errno and Issue a FAIL message. 43 * Otherwise, 44 * Verify the Functionality of system call 45 * if successful, 46 * Issue Functionality-Pass message. 47 * Otherwise, 48 * Issue Functionality-Fail message. 49 * Cleanup: 50 * Print errno log and/or timing stats if options given 51 * 52 * Usage: <for command-line> 53 * getresgid03 [-c n] [-f] [-i n] [-I x] [-P x] [-t] 54 * where, -c n : Run n copies concurrently. 55 * -f : Turn off functionality Testing. 56 * -i n : Execute test n times. 57 * -I x : Execute test for x seconds. 58 * -P x : Pause for x seconds between iterations. 59 * -t : Turn on syscall timing. 60 * 61 * HISTORY 62 * 07/2001 Ported by Wayne Boyer 63 * 64 * RESTRICTIONS: 65 * This test should be run by 'super-user' (root) only. 66 * 67 */ 68 #define _GNU_SOURCE 1 69 70 #include <stdio.h> 71 #include <unistd.h> 72 #include <sys/types.h> 73 #include <errno.h> 74 #include <fcntl.h> 75 #include <string.h> 76 #include <signal.h> 77 #include <pwd.h> 78 79 #include "test.h" 80 81 extern int getresgid(gid_t *, gid_t *, gid_t *); 82 extern int setresgid(gid_t, gid_t, gid_t); 83 84 char *TCID = "getresgid03"; 85 int TST_TOTAL = 1; 86 gid_t pr_gid, pe_gid, ps_gid; /* calling process real/effective/saved gid */ 87 88 void setup(); /* Main setup function of test */ 89 void cleanup(); /* cleanup function for the test */ 90 91 int main(int ac, char **av) 92 { 93 int lc; 94 gid_t real_gid, /* real/eff./saved user id from getresgid() */ 95 eff_gid, sav_gid; 96 97 tst_parse_opts(ac, av, NULL, NULL); 98 99 setup(); 100 101 for (lc = 0; TEST_LOOPING(lc); lc++) { 102 103 tst_count = 0; 104 105 /* 106 * Call getresgid() to get the real/effective/saved 107 * user id's of the calling process after 108 * setregid() in setup. 109 */ 110 TEST(getresgid(&real_gid, &eff_gid, &sav_gid)); 111 112 if (TEST_RETURN == -1) { 113 tst_resm(TFAIL, "getresgid() Failed, errno=%d : %s", 114 TEST_ERRNO, strerror(TEST_ERRNO)); 115 continue; 116 } 117 /* 118 * Verify the real/effective/saved gid 119 * values returned by getresgid with the 120 * expected values. 121 */ 122 if ((real_gid != pr_gid) || (eff_gid != pe_gid) || 123 (sav_gid != ps_gid)) { 124 tst_resm(TFAIL, "real:%d, effective:%d, " 125 "saved-user:%d ids differ", 126 real_gid, eff_gid, sav_gid); 127 } else { 128 tst_resm(TPASS, "Functionality of getresgid() " 129 "successful"); 130 } 131 } 132 133 cleanup(); 134 tst_exit(); 135 } 136 137 /* 138 * setup() - performs all ONE TIME setup for this test. 139 * Make sure test process gid is root. 140 * Get the real/effective/saved user id of the calling process. 141 * Get the user info. of test user "ltpuser1" from /etc/passwd file. 142 * Set the eff. user id of test process to that of "ltpuser1" user. 143 */ 144 void setup(void) 145 { 146 struct passwd *user_id; /* passwd struct for test user */ 147 148 tst_require_root(); 149 150 tst_sig(NOFORK, DEF_HANDLER, cleanup); 151 152 TEST_PAUSE; 153 154 /* Real user-id of the calling process */ 155 pr_gid = getgid(); 156 157 /* Saved user-id of the calling process. */ 158 ps_gid = getegid(); 159 160 /* Get effective gid of "ltpuser1" user from passwd file */ 161 if ((user_id = getpwnam("nobody")) == NULL) { 162 tst_brkm(TBROK, cleanup, 163 "getpwnam(nobody) Failed, errno=%d", errno); 164 } 165 166 /* Effective user-id of the test-user "ltpuser1" */ 167 pe_gid = user_id->pw_gid; 168 169 /* 170 * Set the effective user-id of the process to that of 171 * test user "ltpuser1". 172 * The real/saved user id remains same as of caller. 173 */ 174 if (setresgid(-1, pe_gid, -1) < 0) { 175 tst_brkm(TBROK, cleanup, 176 "setresgid(-1, %d, -1) Fails, errno:%d : %s", 177 ps_gid, errno, strerror(errno)); 178 } 179 } 180 181 /* 182 * cleanup() - performs all ONE TIME cleanup for this test at 183 * completion or premature exit. 184 */ 185 void cleanup(void) 186 { 187 188 /* Reset the effective/saved gid of the calling process */ 189 if (setregid(-1, pr_gid) < 0) { 190 tst_brkm(TBROK, NULL, "resetting process effective gid failed"); 191 } 192 193 } 194
