semctl02.c revision 74225622077af37664b156b18aaa12f3bda9939e
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 * semctl02.c 23 * 24 * DESCRIPTION 25 * semctl02 - test for EACCES error 26 * 27 * ALGORITHM 28 * create a semaphore set without read/alter permissions 29 * loop if that option was specified 30 * call semctl() attempting an IPC_STAT command 31 * check the errno value 32 * issue a PASS message if we get EACCES 33 * otherwise, the tests fails 34 * issue a FAIL message 35 * call cleanup 36 * 37 * USAGE: <for command-line> 38 * semctl02 [-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 53#include "ipcsem.h" 54#include <pwd.h> 55 56char *TCID = "semctl02"; 57int TST_TOTAL = 1; 58 59int exp_enos[] = { EACCES, 0 }; /* 0 terminated list of expected errnos */ 60 61char nobody_uid[] = "nobody"; 62struct passwd *ltpuser; 63 64int sem_id_1 = -1; 65 66int main(int ac, char **av) 67{ 68 int lc; 69 const char *msg; 70 71 struct semid_ds sem_ds; 72 union semun un_arg; 73 74 if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL) 75 tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); 76 77 setup(); /* global setup */ 78 79 /* The following loop checks looping state if -i option given */ 80 81 for (lc = 0; TEST_LOOPING(lc); lc++) { 82 /* reset tst_count in case we are looping */ 83 tst_count = 0; 84 85 un_arg.buf = &sem_ds; 86 87 /* 88 * use the TEST macro to make the call 89 */ 90 91 TEST(semctl(sem_id_1, 0, IPC_STAT, un_arg)); 92 93 if (TEST_RETURN != -1) { 94 tst_resm(TFAIL, "call succeeded when error expected"); 95 continue; 96 } 97 98 TEST_ERROR_LOG(TEST_ERRNO); 99 100 switch (TEST_ERRNO) { 101 case EACCES: 102 tst_resm(TPASS, "expected failure - errno = %d : %s", 103 TEST_ERRNO, strerror(TEST_ERRNO)); 104 break; 105 default: 106 tst_resm(TFAIL, "unexpected error - %d : %s", 107 TEST_ERRNO, strerror(TEST_ERRNO)); 108 break; 109 } 110 } 111 112 cleanup(); 113 114 tst_exit(); 115} 116 117/* 118 * setup() - performs all the ONE TIME setup for this test. 119 */ 120void setup(void) 121{ 122 123 tst_sig(NOFORK, DEF_HANDLER, cleanup); 124 125 /* Set up the expected error numbers for -e option */ 126 TEST_EXP_ENOS(exp_enos); 127 128 TEST_PAUSE; 129 130 /* Switch to nobody user for correct error code collection */ 131 if (geteuid() != 0) { 132 tst_brkm(TBROK, NULL, "Test must be run as root"); 133 } 134 ltpuser = getpwnam(nobody_uid); 135 if (setuid(ltpuser->pw_uid) == -1) { 136 tst_resm(TINFO, "setuid failed to " 137 "to set the effective uid to %d", ltpuser->pw_uid); 138 perror("setuid"); 139 } 140 141 /* 142 * Create a temporary directory and cd into it. 143 * This helps to ensure that a unique msgkey is created. 144 * See ../lib/libipc.c for more information. 145 */ 146 tst_tmpdir(); 147 148 /* get an IPC resource key */ 149 semkey = getipckey(); 150 151 /* create a semaphore set without read or alter permissions */ 152 if ((sem_id_1 = semget(semkey, PSEMS, IPC_CREAT | IPC_EXCL)) == -1) { 153 tst_brkm(TBROK, cleanup, "couldn't create semaphore in setup"); 154 } 155} 156 157/* 158 * cleanup() - performs all the ONE TIME cleanup for this test at completion 159 * or premature exit. 160 */ 161void cleanup(void) 162{ 163 /* if it exists, remove the semaphore resouce */ 164 rm_sema(sem_id_1); 165 166 tst_rmdir(); 167 168 /* 169 * print timing stats if that option was specified. 170 * print errno log if that option was specified. 171 */ 172 TEST_CLEANUP; 173 174} 175