1/* $NetBSD: t_msgget.c,v 1.2 2014/02/27 00:59:50 joerg Exp $ */
2
3/*-
4 * Copyright (c) 2011 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jukka Ruohonen.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31#include <sys/cdefs.h>
32__RCSID("$NetBSD: t_msgget.c,v 1.2 2014/02/27 00:59:50 joerg Exp $");
33
34#include <sys/msg.h>
35#include <sys/stat.h>
36#include <sys/sysctl.h>
37#include <sys/wait.h>
38
39#include <atf-c.h>
40#include <errno.h>
41#include <pwd.h>
42#include <stdio.h>
43#include <stdlib.h>
44#include <string.h>
45#include <sysexits.h>
46#include <time.h>
47#include <unistd.h>
48
49#define MSG_KEY		12345689
50
51static void		clean(void);
52
53static void
54clean(void)
55{
56	int id;
57
58	if ((id = msgget(MSG_KEY, 0)) != -1)
59		(void)msgctl(id, IPC_RMID, 0);
60}
61
62ATF_TC_WITH_CLEANUP(msgget_excl);
63ATF_TC_HEAD(msgget_excl, tc)
64{
65	atf_tc_set_md_var(tc, "descr", "Test msgget(2) with IPC_EXCL");
66}
67
68ATF_TC_BODY(msgget_excl, tc)
69{
70	int id;
71
72	/*
73	 * Create a message queue and re-open it with
74	 * O_CREAT and IPC_EXCL set. This should fail.
75	 */
76	id = msgget(MSG_KEY, IPC_CREAT | 0600);
77
78	if (id < 0)
79		atf_tc_fail("failed to create message queue");
80
81	errno = 0;
82
83	if (msgget(MSG_KEY, IPC_CREAT | IPC_EXCL | 0600) != -1)
84		atf_tc_fail("msgget(2) failed for IPC_EXCL");
85
86	ATF_REQUIRE(errno == EEXIST);
87
88	/*
89	 * However, the same call should succeed
90	 * when IPC_EXCL is not set in the flags.
91	 */
92	id = msgget(MSG_KEY, IPC_CREAT | 0600);
93
94	if (id < 0)
95		atf_tc_fail("msgget(2) failed to re-open");
96
97	ATF_REQUIRE(msgctl(id, IPC_RMID, 0) == 0);
98}
99
100ATF_TC_CLEANUP(msgget_excl, tc)
101{
102	clean();
103}
104
105ATF_TC_WITH_CLEANUP(msgget_exit);
106ATF_TC_HEAD(msgget_exit, tc)
107{
108	atf_tc_set_md_var(tc, "descr",
109	    "Test that XSI message queues are "
110	    "not removed when the process exits");
111}
112
113ATF_TC_BODY(msgget_exit, tc)
114{
115	int id, sta;
116	pid_t pid;
117
118	pid = fork();
119	ATF_REQUIRE(pid >= 0);
120
121	if (pid == 0) {
122
123		if (msgget(MSG_KEY, IPC_CREAT | IPC_EXCL | 0600) == -1)
124			_exit(EXIT_FAILURE);
125
126		_exit(EXIT_SUCCESS);
127	}
128
129	(void)wait(&sta);
130
131	if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
132		atf_tc_fail("failed to create message queue");
133
134	id = msgget(MSG_KEY, 0);
135
136	if (id == -1)
137		atf_tc_fail("message queue was removed on process exit");
138
139	ATF_REQUIRE(msgctl(id, IPC_RMID, 0) == 0);
140}
141
142ATF_TC_CLEANUP(msgget_exit, tc)
143{
144	clean();
145}
146
147ATF_TC_WITH_CLEANUP(msgget_init);
148ATF_TC_HEAD(msgget_init, tc)
149{
150	atf_tc_set_md_var(tc, "descr",
151	    "Test that msgget(2) initializes data structures properly");
152}
153
154ATF_TC_BODY(msgget_init, tc)
155{
156	const uid_t uid = geteuid();
157	const gid_t gid = getegid();
158	struct msqid_ds msgds;
159	time_t t;
160	int id;
161
162	(void)memset(&msgds, 0x9, sizeof(struct msqid_ds));
163
164	t = time(NULL);
165	id = msgget(MSG_KEY, IPC_CREAT | 0600);
166
167	ATF_REQUIRE(id !=-1);
168	ATF_REQUIRE(msgctl(id, IPC_STAT, &msgds) == 0);
169
170	ATF_CHECK(msgds.msg_qnum == 0);
171	ATF_CHECK(msgds.msg_lspid == 0);
172	ATF_CHECK(msgds.msg_lrpid == 0);
173	ATF_CHECK(msgds.msg_rtime == 0);
174	ATF_CHECK(msgds.msg_stime == 0);
175	ATF_CHECK(msgds.msg_perm.uid == uid);
176	ATF_CHECK(msgds.msg_perm.gid == gid);
177	ATF_CHECK(msgds.msg_perm.cuid == uid);
178	ATF_CHECK(msgds.msg_perm.cgid == gid);
179	ATF_CHECK(msgds.msg_perm.mode == 0600);
180
181	if (llabs(t - msgds.msg_ctime) > 5)
182		atf_tc_fail("msgget(2) initialized current time incorrectly");
183
184	ATF_REQUIRE(msgctl(id, IPC_RMID, 0) == 0);
185}
186
187ATF_TC_CLEANUP(msgget_init, tc)
188{
189	clean();
190}
191
192ATF_TC(msgget_limit);
193ATF_TC_HEAD(msgget_limit, tc)
194{
195	atf_tc_set_md_var(tc, "descr", "Test msgget(2) against system limits");
196}
197
198ATF_TC_BODY(msgget_limit, tc)
199{
200	size_t len = sizeof(int);
201	bool fail = false;
202	int i, lim = 0;
203	int *buf;
204
205	if (sysctlbyname("kern.ipc.msgmni", &lim, &len, NULL, 0) != 0)
206		atf_tc_skip("failed to read kern.ipc.msgmni sysctl");
207
208	buf = calloc(lim + 1, sizeof(*buf));
209	ATF_REQUIRE(buf != NULL);
210
211	for (i = 0; i < lim; i++) {
212
213		buf[i] = msgget(MSG_KEY + i, IPC_CREAT | IPC_EXCL | 0600);
214
215		(void)fprintf(stderr, "key[%d] = %d\n", i, buf[i]);
216
217		/*
218		 * This test only works when there are zero existing
219		 * message queues. Thus, bypass the unit test when
220		 * this precondition is not met, for reason or another.
221		 */
222		if (buf[i] == -1)
223			goto out;
224	}
225
226	i++;
227	errno = 0;
228
229	buf[i] = msgget(MSG_KEY + i, IPC_CREAT | IPC_EXCL | 0600);
230
231	if (buf[i] != -1 || errno != ENOSPC)
232		fail = true;
233
234out:	/* Remember to clean-up. */
235	for (i = 0; i < lim; i++)
236		(void)msgctl(buf[i], IPC_RMID, 0);
237
238	free(buf);
239
240	if (fail != false)
241		atf_tc_fail("msgget(2) opened more than %d queues", lim);
242}
243
244ATF_TC_WITH_CLEANUP(msgget_mode);
245ATF_TC_HEAD(msgget_mode, tc)
246{
247	atf_tc_set_md_var(tc, "descr", "Test different modes with msgget(2)");
248	atf_tc_set_md_var(tc, "require.user", "root");
249}
250
251ATF_TC_BODY(msgget_mode, tc)
252{
253	static const mode_t mode[] = {
254		S_IRWXU, S_IRUSR, S_IWUSR, S_IXUSR, S_IRWXG, S_IRGRP,
255		S_IWGRP, S_IXGRP, S_IRWXO, S_IROTH, S_IWOTH, S_IXOTH
256	};
257
258	struct msqid_ds msgds;
259	size_t i;
260	int id;
261
262	for (i = 0; i < __arraycount(mode); i++) {
263
264		(void)fprintf(stderr, "testing mode %d\n", mode[i]);
265		(void)memset(&msgds, 0, sizeof(struct msqid_ds));
266
267		id = msgget(MSG_KEY, IPC_CREAT | IPC_EXCL | (int)mode[i]);
268
269		ATF_REQUIRE(id != -1);
270		ATF_REQUIRE(msgctl(id, IPC_STAT, &msgds) == 0);
271		ATF_REQUIRE(msgds.msg_perm.mode == mode[i]);
272		ATF_REQUIRE(msgctl(id, IPC_RMID, 0) == 0);
273	}
274}
275
276ATF_TC_CLEANUP(msgget_mode, tc)
277{
278	clean();
279}
280
281
282ATF_TP_ADD_TCS(tp)
283{
284
285	ATF_TP_ADD_TC(tp, msgget_excl);
286	ATF_TP_ADD_TC(tp, msgget_exit);
287	ATF_TP_ADD_TC(tp, msgget_init);
288	ATF_TP_ADD_TC(tp, msgget_limit);
289	ATF_TP_ADD_TC(tp, msgget_mode);
290
291	return atf_no_error();
292}
293