msgtest.c revision 101902 
1/*-
2 * Copyright (c) 1999 The NetBSD Foundation, Inc.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to The NetBSD Foundation
6 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
7 * NASA Ames Research Center.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed by the NetBSD
20 *	Foundation, Inc. and its contributors.
21 * 4. Neither the name of The NetBSD Foundation nor the names of its
22 *    contributors may be used to endorse or promote products derived
23 *    from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
26 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Obtained from: $NetBSD: msgtest.c,v 1.7 2002/07/20 08:36:25 grant Exp $
38 * $FreeBSD: head/tools/regression/sysvmsg/msgtest.c 101902 2002-08-15 06:34:37Z alfred $
39 */
40
41/*
42 * Test the SVID-compatible Message Queue facility.
43 */
44
45#include <sys/param.h>
46#include <sys/ipc.h>
47#include <sys/msg.h>
48#include <sys/wait.h>
49
50#include <err.h>
51#include <errno.h>
52#include <signal.h>
53#include <stdio.h>
54#include <stdlib.h>
55#include <string.h>
56#include <time.h>
57#include <unistd.h>
58
59void	print_msqid_ds (struct msqid_ds *, mode_t);
60void	sigsys_handler(int);
61void	sigchld_handler (int);
62void	cleanup (void);
63void	receiver (void);
64void	usage (void);
65
66#define	MESSAGE_TEXT_LEN	255
67
68/*
69 * Define it as test_mymsg because we already have struct mymsg and we dont
70 * want to conflict with it.  Also, regression fails when the default mymsg
71 * struct is used, because mtext[] array is '1', so the passed string cannot
72 * be processed.
73 */
74struct test_mymsg {
75	long	mtype;
76	char	mtext[MESSAGE_TEXT_LEN];
77};
78
79const char *m1_str = "California is overrated.";
80const char *m2_str = "The quick brown fox jumped over the lazy dog.";
81
82#define	MTYPE_1		1
83#define	MTYPE_1_ACK	2
84
85#define	MTYPE_2		3
86#define	MTYPE_2_ACK	4
87
88int	sender_msqid = -1;
89pid_t	child_pid;
90
91key_t	msgkey;
92
93int
94main(int argc, char *argv[])
95{
96	struct sigaction sa;
97	struct msqid_ds m_ds;
98	struct test_mymsg m;
99	sigset_t sigmask;
100
101	if (argc != 2)
102		usage();
103
104	/*
105	 * Install a SIGSYS handler so that we can exit gracefully if
106	 * System V Message Queue support isn't in the kernel.
107	 */
108	sa.sa_handler = sigsys_handler;
109	sigemptyset(&sa.sa_mask);
110	sa.sa_flags = 0;
111	if (sigaction(SIGSYS, &sa, NULL) == -1)
112		err(1, "sigaction SIGSYS");
113
114	/*
115	 * Install and SIGCHLD handler to deal with all possible exit
116	 * conditions of the receiver.
117	 */
118	sa.sa_handler = sigchld_handler;
119	sigemptyset(&sa.sa_mask);
120	sa.sa_flags = 0;
121	if (sigaction(SIGCHLD, &sa, NULL) == -1)
122		err(1, "sigaction SIGCHLD");
123
124	msgkey = ftok(argv[1], 4160);
125
126	/*
127	 * Initialize child_pid to ourselves to that the cleanup function
128	 * works before we create the receiver.
129	 */
130	child_pid = getpid();
131
132	/*
133	 * Make sure that when the sender exits, the message queue is
134	 * removed.
135	 */
136	if (atexit(cleanup) == -1)
137		err(1, "atexit");
138
139	if ((sender_msqid = msgget(msgkey, IPC_CREAT | 0640)) == -1)
140		err(1, "msgget");
141
142	if (msgctl(sender_msqid, IPC_STAT, &m_ds) == -1)
143		err(1, "msgctl IPC_STAT");
144
145	print_msqid_ds(&m_ds, 0640);
146
147	m_ds.msg_perm.mode = (m_ds.msg_perm.mode & ~0777) | 0600;
148
149	if (msgctl(sender_msqid, IPC_SET, &m_ds) == -1)
150		err(1, "msgctl IPC_SET");
151
152	bzero(&m_ds, sizeof m_ds);
153
154	if (msgctl(sender_msqid, IPC_STAT, &m_ds) == -1)
155		err(1, "msgctl IPC_STAT");
156
157	if ((m_ds.msg_perm.mode & 0777) != 0600)
158		err(1, "IPC_SET of mode didn't hold");
159
160	print_msqid_ds(&m_ds, 0600);
161
162	switch ((child_pid = fork())) {
163	case -1:
164		err(1, "fork");
165		/* NOTREACHED */
166
167	case 0:
168		receiver();
169		break;
170
171	default:
172		break;
173	}
174
175	/*
176	 * Send the first message to the receiver and wait for the ACK.
177	 */
178	m.mtype = MTYPE_1;
179	strcpy(m.mtext, m1_str);
180	if (msgsnd(sender_msqid, &m, sizeof(m), 0) == -1)
181		err(1, "sender: msgsnd 1");
182
183	if (msgrcv(sender_msqid, &m, sizeof(m), MTYPE_1_ACK, 0) != sizeof(m))
184		err(1, "sender: msgrcv 1 ack");
185
186	print_msqid_ds(&m_ds, 0600);
187
188	/*
189	 * Send the second message to the receiver and wait for the ACK.
190	 */
191	m.mtype = MTYPE_2;
192	strcpy(m.mtext, m2_str);
193	if (msgsnd(sender_msqid, &m, sizeof(m), 0) == -1)
194		err(1, "sender: msgsnd 2");
195
196	if (msgrcv(sender_msqid, &m, sizeof(m), MTYPE_2_ACK, 0) != sizeof(m))
197		err(1, "sender: msgrcv 2 ack");
198
199	/*
200	 * Suspend forever; when we get SIGCHLD, the handler will exit.
201	 */
202	sigemptyset(&sigmask);
203	(void) sigsuspend(&sigmask);
204
205	/*
206	 * ...and any other signal is an unexpected error.
207	 */
208	errx(1, "sender: received unexpected signal");
209}
210
211void
212sigsys_handler(int signo)
213{
214
215	errx(1, "System V Message Queue support is not present in the kernel");
216}
217
218void
219sigchld_handler(int signo)
220{
221	struct msqid_ds m_ds;
222	int cstatus;
223
224	/*
225	 * Reap the child; if it exited successfully, then the test passed!
226	 */
227	if (waitpid(child_pid, &cstatus, 0) != child_pid)
228		err(1, "waitpid");
229
230	if (WIFEXITED(cstatus) == 0)
231		errx(1, "receiver exited abnormally");
232
233	if (WEXITSTATUS(cstatus) != 0)
234		errx(1, "receiver exited with status %d",
235		    WEXITSTATUS(cstatus));
236
237	/*
238	 * If we get here, the child has exited normally, and thus
239	 * we should exit normally too.  First, tho, we print out
240	 * the final stats for the message queue.
241	 */
242
243	if (msgctl(sender_msqid, IPC_STAT, &m_ds) == -1)
244		err(1, "msgctl IPC_STAT");
245
246	print_msqid_ds(&m_ds, 0600);
247
248	exit(0);
249}
250
251void
252cleanup()
253{
254
255	/*
256	 * If we're the sender, and it exists, remove the message queue.
257	 */
258	if (child_pid != 0 && sender_msqid != -1) {
259		if (msgctl(sender_msqid, IPC_RMID, NULL) == -1)
260			warn("msgctl IPC_RMID");
261	}
262}
263
264void
265print_msqid_ds(struct msqid_ds *mp, mode_t mode)
266{
267	uid_t uid = geteuid();
268	gid_t gid = getegid();
269
270	printf("PERM: uid %d, gid %d, cuid %d, cgid %d, mode 0%o\n",
271	    mp->msg_perm.uid, mp->msg_perm.gid,
272	    mp->msg_perm.cuid, mp->msg_perm.cgid,
273	    mp->msg_perm.mode & 0777);
274
275	printf("qnum %lu, qbytes %lu, lspid %d, lrpid %d\n",
276	    mp->msg_qnum, (u_long)mp->msg_qbytes, mp->msg_lspid,
277	    mp->msg_lrpid);
278
279	printf("stime: %s", ctime(&mp->msg_stime));
280	printf("rtime: %s", ctime(&mp->msg_rtime));
281	printf("ctime: %s", ctime(&mp->msg_ctime));
282
283	/*
284	 * Sanity check a few things.
285	 */
286
287	if (mp->msg_perm.uid != uid || mp->msg_perm.cuid != uid)
288		errx(1, "uid mismatch");
289
290	if (mp->msg_perm.gid != gid || mp->msg_perm.cgid != gid)
291		errx(1, "gid mismatch");
292
293	if ((mp->msg_perm.mode & 0777) != mode)
294		errx(1, "mode mismatch");
295}
296
297void
298usage()
299{
300
301	fprintf(stderr, "usage: %s keypath\n", getprogname());
302	exit(1);
303}
304
305void
306receiver()
307{
308	struct test_mymsg m;
309	int msqid;
310
311	if ((msqid = msgget(msgkey, 0)) == -1)
312		err(1, "receiver: msgget");
313
314	/*
315	 * Receive the first message, print it, and send an ACK.
316	 */
317
318	if (msgrcv(msqid, &m, sizeof(m), MTYPE_1, 0) != sizeof(m))
319		err(1, "receiver: msgrcv 1");
320
321	printf("%s\n", m.mtext);
322	if (strcmp(m.mtext, m1_str) != 0)
323		err(1, "receiver: message 1 data isn't correct");
324
325	m.mtype = MTYPE_1_ACK;
326
327	if (msgsnd(msqid, &m, sizeof(m), 0) == -1)
328		err(1, "receiver: msgsnd ack 1");
329
330	/*
331	 * Receive the second message, print it, and send an ACK.
332	 */
333
334	if (msgrcv(msqid, &m, sizeof(m), MTYPE_2, 0) != sizeof(m))
335		err(1, "receiver: msgrcv 2");
336
337	printf("%s\n", m.mtext);
338	if (strcmp(m.mtext, m2_str) != 0)
339		err(1, "receiver: message 2 data isn't correct");
340
341	m.mtype = MTYPE_2_ACK;
342
343	if (msgsnd(msqid, &m, sizeof(m), 0) == -1)
344		err(1, "receiver: msgsnd ack 2");
345
346	exit(0);
347}
348