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 * shmget04.c 23 * 24 * DESCRIPTION 25 * shmget04 - test for EACCES error 26 * 27 * ALGORITHM 28 * create a shared memory segment without read or write permissions 29 * loop if that option was specified 30 * call shmget() with SHM_RW flag using TEST() macro 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 * shmget04 [-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 #include "ipcshm.h" 54 55 char *TCID = "shmget04"; 56 int TST_TOTAL = 1; 57 58 char nobody_uid[] = "nobody"; 59 struct passwd *ltpuser; 60 61 int shm_id_1 = -1; 62 63 int main(int ac, char **av) 64 { 65 int lc; 66 67 tst_parse_opts(ac, av, NULL, NULL); 68 69 setup(); /* global setup */ 70 71 /* The following loop checks looping state if -i option given */ 72 73 for (lc = 0; TEST_LOOPING(lc); lc++) { 74 /* reset tst_count in case we are looping */ 75 tst_count = 0; 76 77 /* 78 * use the TEST() macro to make the call 79 */ 80 81 TEST(shmget(shmkey, SHM_SIZE, SHM_RW)); 82 83 if (TEST_RETURN != -1) { 84 tst_resm(TFAIL, "call succeeded when error expected"); 85 continue; 86 } 87 88 switch (TEST_ERRNO) { 89 case EACCES: 90 tst_resm(TPASS, "expected failure - errno = " 91 "%d : %s", TEST_ERRNO, strerror(TEST_ERRNO)); 92 break; 93 default: 94 tst_resm(TFAIL, "call failed with an " 95 "unexpected error - %d : %s", 96 TEST_ERRNO, strerror(TEST_ERRNO)); 97 break; 98 } 99 } 100 101 cleanup(); 102 103 tst_exit(); 104 } 105 106 /* 107 * setup() - performs all the ONE TIME setup for this test. 108 */ 109 void setup(void) 110 { 111 tst_require_root(); 112 113 tst_sig(NOFORK, DEF_HANDLER, cleanup); 114 115 TEST_PAUSE; 116 117 /* Switch to nobody user for correct error code collection */ 118 ltpuser = getpwnam(nobody_uid); 119 if (setuid(ltpuser->pw_uid) == -1) { 120 tst_resm(TINFO, "setuid failed to " 121 "to set the effective uid to %d", ltpuser->pw_uid); 122 perror("setuid"); 123 } 124 125 /* 126 * Create a temporary directory and cd into it. 127 * This helps to ensure that a unique msgkey is created. 128 * See ../lib/libipc.c for more information. 129 */ 130 tst_tmpdir(); 131 132 /* get an IPC resource key */ 133 shmkey = getipckey(); 134 135 /* create a shared memory segment without read or access permissions */ 136 if ((shm_id_1 = shmget(shmkey, SHM_SIZE, IPC_CREAT | IPC_EXCL)) == -1) { 137 tst_brkm(TBROK, cleanup, "Failed to create shared memory " 138 "segment in setup"); 139 } 140 } 141 142 /* 143 * cleanup() - performs all the ONE TIME cleanup for this test at completion 144 * or premature exit. 145 */ 146 void cleanup(void) 147 { 148 /* if it exists, remove the shared memory resource */ 149 rm_shm(shm_id_1); 150 151 tst_rmdir(); 152 153 } 154
