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 "ipcsem.h"
55
56 char *TCID = "semget02";
57 int TST_TOTAL = 2;
58
59 char nobody_uid[] = "nobody";
60 struct passwd *ltpuser;
61
62 int sem_id_1 = -1;
63
64 struct 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
main(int ac,char ** av)77 int 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 */
setup(void)122 void 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 libs/libltpipc/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 */
cleanup(void)158 void cleanup(void)
159 {
160 /* if it exists, remove the semaphore resource */
161 rm_sema(sem_id_1);
162
163 tst_rmdir();
164
165 }
166