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 *
18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 *
30 * Obtained from: $NetBSD: msgtest.c,v 1.7 2002/07/20 08:36:25 grant Exp $
31 */
32
33/*
34 * Test the SVID-compatible Message Queue facility.
35 */
36
37#include <sys/types.h>
38#include <sys/ipc.h>
39#include <sys/msg.h>
40#include <sys/wait.h>
41
42#include <err.h>
43#include <errno.h>
44#include <signal.h>
45#include <stdio.h>
46#include <stdlib.h>
47#include <string.h>
48#include <time.h>
49#include <unistd.h>
50
51void	print_msqid_ds (struct msqid_ds *, mode_t);
52void	sigsys_handler(int);
53void	sigchld_handler (int);
54void	cleanup (void);
55void	receiver (void);
56void	usage (void);
57
58#define	MESSAGE_TEXT_LEN	255
59
60/*
61 * Define it as test_mymsg because we already have struct mymsg and we dont
62 * want to conflict with it.  Also, regression fails when the default mymsg
63 * struct is used, because mtext[] array is '1', so the passed string cannot
64 * be processed.
65 */
66struct test_mymsg {
67	long	mtype;
68	char	mtext[MESSAGE_TEXT_LEN];
69};
70
71const char *m1_str = "California is overrated.";
72const char *m2_str = "The quick brown fox jumped over the lazy dog.";
73
74#define	MTYPE_1		1
75#define	MTYPE_1_ACK	2
76
77#define	MTYPE_2		3
78#define	MTYPE_2_ACK	4
79
80int	sender_msqid = -1;
81pid_t	child_pid;
82
83key_t	msgkey;
84
85int
86main(int argc, char *argv[])
87{
88	struct sigaction sa;
89	struct msqid_ds m_ds;
90	struct test_mymsg m;
91	sigset_t sigmask;
92
93	if (argc != 2)
94		usage();
95
96	/*
97	 * Install a SIGSYS handler so that we can exit gracefully if
98	 * System V Message Queue support isn't in the kernel.
99	 */
100	sa.sa_handler = sigsys_handler;
101	sigemptyset(&sa.sa_mask);
102	sa.sa_flags = 0;
103	if (sigaction(SIGSYS, &sa, NULL) == -1)
104		err(1, "sigaction SIGSYS");
105
106	/*
107	 * Install and SIGCHLD handler to deal with all possible exit
108	 * conditions of the receiver.
109	 */
110	sa.sa_handler = sigchld_handler;
111	sigemptyset(&sa.sa_mask);
112	sa.sa_flags = 0;
113	if (sigaction(SIGCHLD, &sa, NULL) == -1)
114		err(1, "sigaction SIGCHLD");
115
116	msgkey = ftok(argv[1], 4160);
117
118	/*
119	 * Initialize child_pid to ourselves to that the cleanup function
120	 * works before we create the receiver.
121	 */
122	child_pid = getpid();
123
124	/*
125	 * Make sure that when the sender exits, the message queue is
126	 * removed.
127	 */
128	if (atexit(cleanup) == -1)
129		err(1, "atexit");
130
131	if ((sender_msqid = msgget(msgkey, IPC_CREAT | 0640)) == -1)
132		err(1, "msgget");
133
134	if (msgctl(sender_msqid, IPC_STAT, &m_ds) == -1)
135		err(1, "msgctl IPC_STAT");
136
137	print_msqid_ds(&m_ds, 0640);
138
139	m_ds.msg_perm.mode = (m_ds.msg_perm.mode & ~0777) | 0600;
140
141	if (msgctl(sender_msqid, IPC_SET, &m_ds) == -1)
142		err(1, "msgctl IPC_SET");
143
144	bzero(&m_ds, sizeof m_ds);
145
146	if (msgctl(sender_msqid, IPC_STAT, &m_ds) == -1)
147		err(1, "msgctl IPC_STAT");
148
149	if ((m_ds.msg_perm.mode & 0777) != 0600)
150		err(1, "IPC_SET of mode didn't hold");
151
152	print_msqid_ds(&m_ds, 0600);
153
154	switch ((child_pid = fork())) {
155	case -1:
156		err(1, "fork");
157		/* NOTREACHED */
158
159	case 0:
160		receiver();
161		break;
162
163	default:
164		break;
165	}
166
167	/*
168	 * Send the first message to the receiver and wait for the ACK.
169	 */
170	m.mtype = MTYPE_1;
171	strcpy(m.mtext, m1_str);
172	if (msgsnd(sender_msqid, &m, strlen(m1_str) + 1, 0) == -1)
173		err(1, "sender: msgsnd 1");
174
175	if (msgrcv(sender_msqid, &m, sizeof(m.mtext), MTYPE_1_ACK, 0) !=
176	    strlen(m1_str) + 1)
177		err(1, "sender: msgrcv 1 ack");
178
179	print_msqid_ds(&m_ds, 0600);
180
181	/*
182	 * Send the second message to the receiver and wait for the ACK.
183	 */
184	m.mtype = MTYPE_2;
185	strcpy(m.mtext, m2_str);
186	if (msgsnd(sender_msqid, &m, strlen(m2_str) + 1, 0) == -1)
187		err(1, "sender: msgsnd 2");
188
189	if (msgrcv(sender_msqid, &m, sizeof(m.mtext), MTYPE_2_ACK, 0) !=
190	    strlen(m2_str) + 1)
191		err(1, "sender: msgrcv 2 ack");
192
193	/*
194	 * Suspend forever; when we get SIGCHLD, the handler will exit.
195	 */
196	sigemptyset(&sigmask);
197	(void) sigsuspend(&sigmask);
198
199	/*
200	 * ...and any other signal is an unexpected error.
201	 */
202	errx(1, "sender: received unexpected signal");
203}
204
205void
206sigsys_handler(int signo)
207{
208
209	errx(1, "System V Message Queue support is not present in the kernel");
210}
211
212void
213sigchld_handler(int signo)
214{
215	struct msqid_ds m_ds;
216	int cstatus;
217
218	/*
219	 * Reap the child; if it exited successfully, then the test passed!
220	 */
221	if (waitpid(child_pid, &cstatus, 0) != child_pid)
222		err(1, "waitpid");
223
224	if (WIFEXITED(cstatus) == 0)
225		errx(1, "receiver exited abnormally");
226
227	if (WEXITSTATUS(cstatus) != 0)
228		errx(1, "receiver exited with status %d",
229		    WEXITSTATUS(cstatus));
230
231	/*
232	 * If we get here, the child has exited normally, and thus
233	 * we should exit normally too.  First, tho, we print out
234	 * the final stats for the message queue.
235	 */
236
237	if (msgctl(sender_msqid, IPC_STAT, &m_ds) == -1)
238		err(1, "msgctl IPC_STAT");
239
240	print_msqid_ds(&m_ds, 0600);
241
242	exit(0);
243}
244
245void
246cleanup()
247{
248
249	/*
250	 * If we're the sender, and it exists, remove the message queue.
251	 */
252	if (child_pid != 0 && sender_msqid != -1) {
253		if (msgctl(sender_msqid, IPC_RMID, NULL) == -1)
254			warn("msgctl IPC_RMID");
255	}
256}
257
258void
259print_msqid_ds(struct msqid_ds *mp, mode_t mode)
260{
261	uid_t uid = geteuid();
262	gid_t gid = getegid();
263
264	printf("PERM: uid %d, gid %d, cuid %d, cgid %d, mode 0%o\n",
265	    mp->msg_perm.uid, mp->msg_perm.gid,
266	    mp->msg_perm.cuid, mp->msg_perm.cgid,
267	    mp->msg_perm.mode & 0777);
268
269	printf("qnum %lu, qbytes %lu, lspid %d, lrpid %d\n",
270	    mp->msg_qnum, (u_long)mp->msg_qbytes, mp->msg_lspid,
271	    mp->msg_lrpid);
272
273	printf("stime: %s", ctime(&mp->msg_stime));
274	printf("rtime: %s", ctime(&mp->msg_rtime));
275	printf("ctime: %s", ctime(&mp->msg_ctime));
276
277	/*
278	 * Sanity check a few things.
279	 */
280
281	if (mp->msg_perm.uid != uid || mp->msg_perm.cuid != uid)
282		errx(1, "uid mismatch");
283
284	if (mp->msg_perm.gid != gid || mp->msg_perm.cgid != gid)
285		errx(1, "gid mismatch");
286
287	if ((mp->msg_perm.mode & 0777) != mode)
288		errx(1, "mode mismatch");
289}
290
291void
292usage()
293{
294
295	fprintf(stderr, "usage: %s keypath\n", getprogname());
296	exit(1);
297}
298
299void
300receiver()
301{
302	struct test_mymsg m;
303	int msqid;
304
305	if ((msqid = msgget(msgkey, 0)) == -1)
306		err(1, "receiver: msgget");
307
308	/*
309	 * Receive the first message, print it, and send an ACK.
310	 */
311
312	if (msgrcv(msqid, &m, sizeof(m.mtext), MTYPE_1, 0) !=
313	    strlen(m1_str) + 1)
314		err(1, "receiver: msgrcv 1");
315
316	printf("%s\n", m.mtext);
317	if (strcmp(m.mtext, m1_str) != 0)
318		err(1, "receiver: message 1 data isn't correct");
319
320	m.mtype = MTYPE_1_ACK;
321
322	if (msgsnd(msqid, &m, strlen(m1_str) + 1, 0) == -1)
323		err(1, "receiver: msgsnd ack 1");
324
325	/*
326	 * Receive the second message, print it, and send an ACK.
327	 */
328
329	if (msgrcv(msqid, &m, sizeof(m.mtext), MTYPE_2, 0) !=
330	    strlen(m2_str) + 1)
331		err(1, "receiver: msgrcv 2");
332
333	printf("%s\n", m.mtext);
334	if (strcmp(m.mtext, m2_str) != 0)
335		err(1, "receiver: message 2 data isn't correct");
336
337	m.mtype = MTYPE_2_ACK;
338
339	if (msgsnd(msqid, &m, strlen(m2_str) + 1, 0) == -1)
340		err(1, "receiver: msgsnd ack 2");
341
342	exit(0);
343}
344