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 * shmget02.c 23 * 24 * DESCRIPTION 25 * shmget02 - check for ENOENT, EEXIST and EINVAL errors 26 * 27 * ALGORITHM 28 * create a shared memory segment with read & write permissions 29 * loop if that option was specified 30 * call shmget() using five different invalid cases 31 * check the errno value 32 * issue a PASS message if we get ENOENT, EEXIST or EINVAL 33 * otherwise, the tests fails 34 * issue a FAIL message 35 * call cleanup 36 * 37 * USAGE: <for command-line> 38 * shmget02 [-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 * 06/03/2008 Renaud Lottiaux (Renaud.Lottiaux (at) kerlabs.com) 50 * - Fix concurrency issue. The second key used for this test could 51 * conflict with the key from another task. 52 * 53 * RESTRICTIONS 54 * none 55 */ 56 57 #include "ipcshm.h" 58 59 char *TCID = "shmget02"; 60 int TST_TOTAL = 4; 61 62 int shm_id_1 = -1; 63 int shm_nonexisting_key = -1; 64 key_t shmkey2; 65 66 struct test_case_t { 67 int *skey; 68 int size; 69 int flags; 70 int error; 71 } TC[] = { 72 /* EINVAL - size is 0 */ 73 { 74 &shmkey2, 0, IPC_CREAT | IPC_EXCL | SHM_RW, EINVAL}, 75 /* EINVAL - size is negative */ 76 // {&shmkey2, -1, IPC_CREAT | IPC_EXCL | SHM_RW, EINVAL}, 77 /* EINVAL - size is larger than created segment */ 78 { 79 &shmkey, SHM_SIZE * 2, SHM_RW, EINVAL}, 80 /* EEXIST - the segment exists and IPC_CREAT | IPC_EXCL is given */ 81 { 82 &shmkey, SHM_SIZE, IPC_CREAT | IPC_EXCL | SHM_RW, EEXIST}, 83 /* ENOENT - no segment exists for the key and IPC_CREAT is not given */ 84 /* use shm_id_2 (-1) as the key */ 85 { 86 &shm_nonexisting_key, SHM_SIZE, SHM_RW, ENOENT} 87 }; 88 89 int main(int ac, char **av) 90 { 91 int lc; 92 int i; 93 94 tst_parse_opts(ac, av, NULL, NULL); 95 96 setup(); /* global setup */ 97 98 /* The following loop checks looping state if -i option given */ 99 100 for (lc = 0; TEST_LOOPING(lc); lc++) { 101 /* reset tst_count in case we are looping */ 102 tst_count = 0; 103 104 /* loop through the test cases */ 105 for (i = 0; i < TST_TOTAL; i++) { 106 /* 107 * Look for a failure ... 108 */ 109 110 TEST(shmget(*(TC[i].skey), TC[i].size, TC[i].flags)); 111 112 if (TEST_RETURN != -1) { 113 tst_resm(TFAIL, "call succeeded unexpectedly"); 114 continue; 115 } 116 117 if (TEST_ERRNO == TC[i].error) { 118 tst_resm(TPASS, "expected failure - errno = " 119 "%d : %s", TEST_ERRNO, 120 strerror(TEST_ERRNO)); 121 } else { 122 tst_resm(TFAIL, "call failed with an " 123 "unexpected error - %d : %s", 124 TEST_ERRNO, strerror(TEST_ERRNO)); 125 } 126 } 127 } 128 129 cleanup(); 130 131 tst_exit(); 132 } 133 134 /* 135 * setup() - performs all the ONE TIME setup for this test. 136 */ 137 void setup(void) 138 { 139 140 tst_sig(NOFORK, DEF_HANDLER, cleanup); 141 142 TEST_PAUSE; 143 144 /* 145 * Create a temporary directory and cd into it. 146 * This helps to ensure that a unique msgkey is created. 147 * See ../lib/libipc.c for more information. 148 */ 149 tst_tmpdir(); 150 151 /* get an IPC resource key */ 152 shmkey = getipckey(); 153 154 /* Get an new IPC resource key. */ 155 shmkey2 = getipckey(); 156 157 if ((shm_id_1 = shmget(shmkey, SHM_SIZE, IPC_CREAT | IPC_EXCL | 158 SHM_RW)) == -1) { 159 tst_brkm(TBROK, cleanup, "couldn't create shared memory " 160 "segment in setup()"); 161 } 162 163 /* Make sure shm_nonexisting_key is a nonexisting key */ 164 while (1) { 165 while (-1 != shmget(shm_nonexisting_key, 1, SHM_RD)) { 166 shm_nonexisting_key--; 167 } 168 if (errno == ENOENT) 169 break; 170 } 171 } 172 173 /* 174 * cleanup() - performs all the ONE TIME cleanup for this test at completion 175 * or premature exit. 176 */ 177 void cleanup(void) 178 { 179 /* if it exists, remove the shared memory resource */ 180 rm_shm(shm_id_1); 181 182 tst_rmdir(); 183 184 } 185
