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 * semctl04.c
23 *
24 * DESCRIPTION
25 * semctl04 - test for EPERM error
26 *
27 * ALGORITHM
28 * create a semaphore set without read or alter permissions
29 * get the user id for "nobody"
30 * fork a child process
31 * if child
32 * set the ID of the child process to that of "nobody"
33 * loop if that option was specified
34 * call semctl() with two different invalid cases
35 * check the errno value
36 * issue a PASS message if we get EPERM
37 * otherwise, the tests fails
38 * issue a FAIL message
39 * call cleanup
40 * if parent
41 * wait for child to exit
42 * remove the semaphore set
43 *
44 * USAGE: <for command-line>
45 * semctl04 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
46 * where, -c n : Run n copies concurrently.
47 * -e : Turn on errno logging.
48 * -i n : Execute test n times.
49 * -I x : Execute test for x seconds.
50 * -P x : Pause for x seconds between iterations.
51 * -t : Turn on syscall timing.
52 *
53 * HISTORY
54 * 03/2001 - Written by Wayne Boyer
55 *
56 * RESTRICTIONS
57 * test must be run as root
58 */
59
60 #include "ipcsem.h"
61
62 #include <pwd.h>
63 #include <sys/wait.h>
64
65 char *TCID = "semctl04";
66 int TST_TOTAL = 2;
67
68 int sem_id_1 = -1;
69
70 uid_t ltp_uid;
71 char *ltp_user = "nobody";
72
73 int TC[] = { IPC_SET, IPC_RMID };
74
main(int ac,char ** av)75 int main(int ac, char **av)
76 {
77 pid_t pid;
78 void do_child(void);
79
80 tst_parse_opts(ac, av, NULL, NULL);
81
82 setup(); /* global setup */
83
84 if ((pid = FORK_OR_VFORK()) == -1) {
85 tst_brkm(TBROK, cleanup, "could not fork");
86 }
87
88 if (pid == 0) { /* child */
89 /* set the user ID of the child to the non root user */
90 if (setuid(ltp_uid) == -1) {
91 tst_resm(TBROK, "setuid() failed");
92 exit(1);
93 }
94
95 do_child();
96
97 } else {
98 if (waitpid(pid, NULL, 0) == -1) {
99 tst_resm(TBROK, "waitpid() failed");
100 tst_resm(TINFO, "waitpid() error = %d : %s", errno,
101 strerror(errno));
102 }
103
104 /* if it exists, remove the semaphore resouce */
105 rm_sema(sem_id_1);
106
107 tst_rmdir();
108 }
109 cleanup();
110
111 tst_exit();
112 }
113
114 /*
115 * do_child() - make the TEST call as the child process
116 */
do_child(void)117 void do_child(void)
118 {
119 int lc;
120 int i;
121 union semun arg;
122 struct semid_ds perm;
123
124 /* The following loop checks looping state if -i option given */
125
126 for (lc = 0; TEST_LOOPING(lc); lc++) {
127 /* reset tst_count in case we are looping */
128 tst_count = 0;
129
130 for (i = 0; i < TST_TOTAL; i++) {
131
132 if (TC[i] == IPC_SET) {
133 arg.buf = &perm;
134 memset(&perm, 0, sizeof perm);
135 perm.sem_perm.uid = getuid() + 1;
136 perm.sem_perm.gid = getgid() + 1;
137 perm.sem_perm.mode = 0666;
138 }
139
140 TEST(semctl(sem_id_1, 0, TC[i], arg));
141
142 if (TEST_RETURN != -1) {
143 tst_resm(TFAIL, "call succeeded unexpectedly");
144 continue;
145 }
146
147 switch (TEST_ERRNO) {
148 case EPERM:
149 tst_resm(TPASS, "expected failure - errno ="
150 " %d : %s", TEST_ERRNO,
151 strerror(TEST_ERRNO));
152 break;
153 default:
154 tst_resm(TFAIL, "unexpected error "
155 "- %d : %s", TEST_ERRNO,
156 strerror(TEST_ERRNO));
157 break;
158 }
159 }
160 }
161 }
162
163 /*
164 * setup() - performs all the ONE TIME setup for this test.
165 */
setup(void)166 void setup(void)
167 {
168 tst_require_root();
169
170 tst_sig(FORK, DEF_HANDLER, cleanup);
171
172 TEST_PAUSE;
173
174 /*
175 * Create a temporary directory and cd into it.
176 * This helps to ensure that a unique msgkey is created.
177 * See ../lib/libipc.c for more information.
178 */
179 tst_tmpdir();
180
181 /* get an IPC resource key */
182 semkey = getipckey();
183
184 /* create a semaphore set without read or alter permissions */
185 if ((sem_id_1 = semget(semkey, PSEMS, IPC_CREAT | IPC_EXCL)) == -1) {
186 tst_brkm(TBROK, cleanup, "couldn't create semaphore in setup");
187 }
188
189 /* get the userid for a non root user */
190 ltp_uid = getuserid(ltp_user);
191 }
192
193 /*
194 * cleanup() - performs all the ONE TIME cleanup for this test at completion
195 * or premature exit.
196 */
cleanup(void)197 void cleanup(void)
198 {
199
200 }
201