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