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 * msgget04.c 23 * 24 * DESCRIPTION 25 * msgget04 - test for an EACCES error by creating a message queue 26 * with no read or write permission and then attempting 27 * to access it with various permissions. 28 * 29 * ALGORITHM 30 * Create a message queue with no read or write permission 31 * loop if that option was specified 32 * Try to access the message queue with various permissions 33 * check the errno value 34 * issue a PASS message if we get EACCES 35 * otherwise, the tests fails 36 * issue a FAIL message 37 * break any remaining tests 38 * call cleanup 39 * 40 * USAGE: <for command-line> 41 * msgget04 [-c n] [-e] [-i n] [-I x] [-P x] [-t] 42 * where, -c n : Run n copies concurrently. 43 * -e : Turn on errno logging. 44 * -i n : Execute test n times. 45 * -I x : Execute test for x seconds. 46 * -P x : Pause for x seconds between iterations. 47 * -t : Turn on syscall timing. 48 * 49 * HISTORY 50 * 03/2001 - Written by Wayne Boyer 51 * 52 * RESTRICTIONS 53 * none 54 */ 55 #include <pwd.h> 56 #include "test.h" 57 58 #include "ipcmsg.h" 59 60 char *TCID = "msgget04"; 61 int TST_TOTAL = 3; 62 63 char nobody_uid[] = "nobody"; 64 struct passwd *ltpuser; 65 66 int msg_q_1 = -1; /* to hold the message queue id */ 67 68 int test_flags[] = { MSG_RD, MSG_WR, MSG_RD | MSG_WR }; 69 70 int main(int ac, char **av) 71 { 72 int lc; 73 int i; 74 75 tst_parse_opts(ac, av, NULL, NULL); 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 /* loop through the test cases */ 86 87 for (i = 0; i < TST_TOTAL; i++) { 88 /* 89 * Try to access the message queue with specified 90 * permissions. 91 */ 92 93 TEST(msgget(msgkey, test_flags[i])); 94 95 if (TEST_RETURN != -1) { 96 tst_resm(TFAIL, "call succeeded " 97 "when EACCES error expected"); 98 continue; 99 } 100 101 switch (TEST_ERRNO) { 102 case EACCES: 103 tst_resm(TPASS, "expected failure - errno = " 104 "%d : %s", TEST_ERRNO, 105 strerror(TEST_ERRNO)); 106 break; 107 default: 108 tst_resm(TFAIL, "call failed with an " 109 "unexpected error - %d : %s", 110 TEST_ERRNO, strerror(TEST_ERRNO)); 111 break; 112 } 113 } 114 } 115 116 cleanup(); 117 118 tst_exit(); 119 } 120 121 /* 122 * setup() - performs all the ONE TIME setup for this test. 123 */ 124 void setup(void) 125 { 126 tst_require_root(); 127 128 tst_sig(NOFORK, DEF_HANDLER, cleanup); 129 130 TEST_PAUSE; 131 132 /* Switch to nobody user for correct error code collection */ 133 ltpuser = getpwnam(nobody_uid); 134 if (setuid(ltpuser->pw_uid) == -1) { 135 tst_resm(TINFO, "setuid failed to " 136 "to set the effective uid to %d", ltpuser->pw_uid); 137 perror("setuid"); 138 } 139 140 /* 141 * Create a temporary directory and cd into it. 142 * This helps to ensure that a unique msgkey is created. 143 * See ../lib/libipc.c for more information. 144 */ 145 tst_tmpdir(); 146 147 msgkey = getipckey(); 148 149 /* 150 * Create the message queue without specifying permissions. 151 */ 152 if ((msg_q_1 = msgget(msgkey, IPC_CREAT | IPC_EXCL)) == -1) { 153 tst_brkm(TBROK, cleanup, "Could not create message queue" 154 " - errno = %d : %s", errno, strerror(errno)); 155 } 156 } 157 158 /* 159 * cleanup() - performs all the ONE TIME cleanup for this test at completion 160 * or premature exit. 161 */ 162 void cleanup(void) 163 { 164 /* if it exists, remove the message queue */ 165 rm_queue(msg_q_1); 166 167 tst_rmdir(); 168 169 } 170
