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 * NAME 22 * semget02.c 23 * 24 * DESCRIPTION 25 * semget02 - test for EACCES and EEXIST errors 26 * 27 * ALGORITHM 28 * create a semaphore set without read or alter permissions 29 * loop if that option was specified 30 * call semget() using two different invalid cases 31 * check the errno value 32 * issue a PASS message if we get EACCES or EEXIST 33 * otherwise, the tests fails 34 * issue a FAIL message 35 * call cleanup 36 * 37 * USAGE: <for command-line> 38 * semget02 [-c n] [-e] [-i n] [-I x] [-P x] [-t] 39 * where, -c n : Run n copies concurrently. 40 * -e : Turn on errno logging. 41 * -i n : Execute test n times. 42 * -I x : Execute test for x seconds. 43 * -P x : Pause for x seconds between iterations. 44 * -t : Turn on syscall timing. 45 * 46 * HISTORY 47 * 03/2001 - Written by Wayne Boyer 48 * 49 * RESTRICTIONS 50 * none 51 */ 52#include <pwd.h> 53 54#include "../lib/ipcsem.h" 55 56char *TCID = "semget02"; 57int TST_TOTAL = 2; 58 59char nobody_uid[] = "nobody"; 60struct passwd *ltpuser; 61 62int sem_id_1 = -1; 63 64struct test_case_t { 65 int flags; 66 int error; 67} TC[] = { 68 /* EACCES - the semaphore has no read or alter permissions */ 69 { 70 SEM_RA, EACCES}, 71 /* EEXIST - the semaphore id exists and semget() was called with */ 72 /* IPC_CREAT and IPC_EXCL */ 73 { 74 IPC_CREAT | IPC_EXCL, EEXIST} 75}; 76 77int main(int ac, char **av) 78{ 79 int lc; 80 int i; 81 82 tst_parse_opts(ac, av, NULL, NULL); 83 84 setup(); /* global setup */ 85 86 /* The following loop checks looping state if -i option given */ 87 88 for (lc = 0; TEST_LOOPING(lc); lc++) { 89 /* reset tst_count in case we are looping */ 90 tst_count = 0; 91 92 for (i = 0; i < TST_TOTAL; i++) { 93 /* use the TEST macro to make the call */ 94 95 TEST(semget(semkey, PSEMS, TC[i].flags)); 96 97 if (TEST_RETURN != -1) { 98 sem_id_1 = TEST_RETURN; 99 tst_resm(TFAIL, "call succeeded"); 100 continue; 101 } 102 103 if (TEST_ERRNO == TC[i].error) { 104 tst_resm(TPASS, "expected failure - errno " 105 "= %d : %s", TEST_ERRNO, 106 strerror(TEST_ERRNO)); 107 } else { 108 tst_resm(TFAIL, "unexpected error - %d : %s", 109 TEST_ERRNO, strerror(TEST_ERRNO)); 110 } 111 } 112 } 113 114 cleanup(); 115 116 tst_exit(); 117} 118 119/* 120 * setup() - performs all the ONE TIME setup for this test. 121 */ 122void setup(void) 123{ 124 tst_require_root(); 125 126 /* Switch to nobody user for correct error code collection */ 127 ltpuser = getpwnam(nobody_uid); 128 if (seteuid(ltpuser->pw_uid) == -1) { 129 tst_resm(TINFO, "setreuid failed to " 130 "to set the effective uid to %d", ltpuser->pw_uid); 131 perror("setreuid"); 132 } 133 134 tst_sig(NOFORK, DEF_HANDLER, cleanup); 135 136 TEST_PAUSE; 137 138 /* 139 * Create a temporary directory and cd into it. 140 * This helps to ensure that a unique msgkey is created. 141 * See ../lib/libipc.c for more information. 142 */ 143 tst_tmpdir(); 144 145 /* get an IPC resource key */ 146 semkey = getipckey(); 147 148 /* create a semaphore set without read or alter permissions */ 149 if ((sem_id_1 = semget(semkey, PSEMS, IPC_CREAT | IPC_EXCL)) == -1) { 150 tst_brkm(TBROK, cleanup, "couldn't create semaphore in setup"); 151 } 152} 153 154/* 155 * cleanup() - performs all the ONE TIME cleanup for this test at completion 156 * or premature exit. 157 */ 158void cleanup(void) 159{ 160 /* if it exists, remove the semaphore resource */ 161 rm_sema(sem_id_1); 162 163 tst_rmdir(); 164 165} 166