semctl02.c revision 43337a3cf6f8809647cf9fc6c0054241f44b1fb1 
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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
56char *TCID = "semctl02";
57int TST_TOTAL = 1;
58extern int Tst_count;
59
60int exp_enos[] = {EACCES, 0};	/* 0 terminated list of expected errnos */
61
62char nobody_uid[] = "nobody";
63struct passwd *ltpuser;
64
65int sem_id_1 = -1;
66
67int main(int ac, char **av)
68{
69	int lc;				/* loop counter */
70	char *msg;			/* message returned from parse_opts */
71
72	struct semid_ds sem_ds;
73	union semun un_arg;
74
75	/* parse standard options */
76	if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) != (char *)NULL){
77		tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg);
78	}
79
80	setup();			/* global setup */
81
82	/* The following loop checks looping state if -i option given */
83
84	for (lc = 0; TEST_LOOPING(lc); lc++) {
85		/* reset Tst_count in case we are looping */
86		Tst_count = 0;
87
88		un_arg.buf = &sem_ds;
89
90		/*
91		 * use the TEST macro to make the call
92		 */
93
94		TEST(semctl(sem_id_1, 0, IPC_STAT, un_arg));
95
96		if (TEST_RETURN != -1) {
97			tst_resm(TFAIL, "call succeeded when error expected");
98			continue;
99		}
100
101		TEST_ERROR_LOG(TEST_ERRNO);
102
103		switch(TEST_ERRNO) {
104		case EACCES:
105			tst_resm(TPASS, "expected failure - errno = %d : %s",
106				 TEST_ERRNO, strerror(TEST_ERRNO));
107			break;
108		default:
109			tst_resm(TFAIL, "unexpected error - %d : %s",
110				 TEST_ERRNO, strerror(TEST_ERRNO));
111			break;
112		}
113	}
114
115	cleanup();
116
117	/*NOTREACHED*/
118        return 0;
119}
120
121/*
122 * setup() - performs all the ONE TIME setup for this test.
123 */
124void
125setup(void)
126{
127	/* capture signals */
128	tst_sig(NOFORK, DEF_HANDLER, cleanup);
129
130	/* Set up the expected error numbers for -e option */
131	TEST_EXP_ENOS(exp_enos);
132
133	/* Pause if that option was specified */
134	TEST_PAUSE;
135
136	 /* Switch to nobody user for correct error code collection */
137        if (geteuid() != 0) {
138                tst_brkm(TBROK, tst_exit, "Test must be run as root");
139        }
140        ltpuser = getpwnam(nobody_uid);
141        if (setuid(ltpuser->pw_uid) == -1) {
142                tst_resm(TINFO, "setuid failed to "
143                         "to set the effective uid to %d",
144                         ltpuser->pw_uid);
145                perror("setuid");
146        }
147
148
149	/*
150	 * Create a temporary directory and cd into it.
151	 * This helps to ensure that a unique msgkey is created.
152	 * See ../lib/libipc.c for more information.
153	 */
154	tst_tmpdir();
155
156	/* get an IPC resource key */
157	semkey = getipckey();
158
159	/* create a semaphore set without read or alter permissions */
160	if ((sem_id_1 = semget(semkey, PSEMS, IPC_CREAT | IPC_EXCL)) == -1) {
161		tst_brkm(TBROK, cleanup, "couldn't create semaphore in setup");
162	}
163}
164
165/*
166 * cleanup() - performs all the ONE TIME cleanup for this test at completion
167 * 	       or premature exit.
168 */
169void
170cleanup(void)
171{
172	/* if it exists, remove the semaphore resouce */
173	rm_sema(sem_id_1);
174
175	/* Remove the temporary directory */
176	tst_rmdir();
177
178	/*
179	 * print timing stats if that option was specified.
180	 * print errno log if that option was specified.
181	 */
182	TEST_CLEANUP;
183
184	/* exit with return code appropriate for results */
185	tst_exit();
186}
187
188