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
56 char *TCID = "semctl02";
57 int TST_TOTAL = 1;
58
59 char nobody_uid[] = "nobody";
60 struct passwd *ltpuser;
61
62 int sem_id_1 = -1;
63
main(int ac,char ** av)64 int main(int ac, char **av)
65 {
66 int lc;
67
68 struct semid_ds sem_ds;
69 union semun un_arg;
70
71 tst_parse_opts(ac, av, NULL, NULL);
72
73 setup(); /* global setup */
74
75 /* The following loop checks looping state if -i option given */
76
77 for (lc = 0; TEST_LOOPING(lc); lc++) {
78 /* reset tst_count in case we are looping */
79 tst_count = 0;
80
81 un_arg.buf = &sem_ds;
82
83 /*
84 * use the TEST macro to make the call
85 */
86
87 TEST(semctl(sem_id_1, 0, IPC_STAT, un_arg));
88
89 if (TEST_RETURN != -1) {
90 tst_resm(TFAIL, "call succeeded when error expected");
91 continue;
92 }
93
94 switch (TEST_ERRNO) {
95 case EACCES:
96 tst_resm(TPASS, "expected failure - errno = %d : %s",
97 TEST_ERRNO, strerror(TEST_ERRNO));
98 break;
99 default:
100 tst_resm(TFAIL, "unexpected error - %d : %s",
101 TEST_ERRNO, strerror(TEST_ERRNO));
102 break;
103 }
104 }
105
106 cleanup();
107
108 tst_exit();
109 }
110
111 /*
112 * setup() - performs all the ONE TIME setup for this test.
113 */
setup(void)114 void setup(void)
115 {
116 tst_require_root();
117
118 tst_sig(NOFORK, DEF_HANDLER, cleanup);
119
120 TEST_PAUSE;
121
122 /* Switch to nobody user for correct error code collection */
123 ltpuser = getpwnam(nobody_uid);
124 if (setuid(ltpuser->pw_uid) == -1) {
125 tst_resm(TINFO, "setuid failed to "
126 "to set the effective uid to %d", ltpuser->pw_uid);
127 perror("setuid");
128 }
129
130 /*
131 * Create a temporary directory and cd into it.
132 * This helps to ensure that a unique msgkey is created.
133 * See ../lib/libipc.c for more information.
134 */
135 tst_tmpdir();
136
137 /* get an IPC resource key */
138 semkey = getipckey();
139
140 /* create a semaphore set without read or alter permissions */
141 if ((sem_id_1 = semget(semkey, PSEMS, IPC_CREAT | IPC_EXCL)) == -1) {
142 tst_brkm(TBROK, cleanup, "couldn't create semaphore in setup");
143 }
144 }
145
146 /*
147 * cleanup() - performs all the ONE TIME cleanup for this test at completion
148 * or premature exit.
149 */
cleanup(void)150 void cleanup(void)
151 {
152 /* if it exists, remove the semaphore resouce */
153 rm_sema(sem_id_1);
154
155 tst_rmdir();
156
157 }
158