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 * $FreeBSD$
32 */
33
34/*
35 * Test the SVID-compatible Message Queue facility.
36 */
37
38#include <sys/types.h>
39#include <sys/ipc.h>
40#include <sys/msg.h>
41#include <sys/wait.h>
42
43#include <err.h>
44#include <errno.h>
45#include <signal.h>
46#include <stdio.h>
47#include <stdlib.h>
48#include <string.h>
49#include <time.h>
50#include <unistd.h>
51
52void	print_msqid_ds (struct msqid_ds *, mode_t);
53void	sigsys_handler(int);
54void	sigchld_handler (int);
55void	cleanup (void);
56void	receiver (void);
57void	usage (void);
58
59#define	MESSAGE_TEXT_LEN	255
60
61/*
62 * Define it as test_mymsg because we already have struct mymsg and we dont
63 * want to conflict with it.  Also, regression fails when the default mymsg
64 * struct is used, because mtext[] array is '1', so the passed string cannot
65 * be processed.
66 */
67struct test_mymsg {
68	long	mtype;
69	char	mtext[MESSAGE_TEXT_LEN];
70};
71
72const char *m1_str = "California is overrated.";
73const char *m2_str = "The quick brown fox jumped over the lazy dog.";
74
75#define	MTYPE_1		1
76#define	MTYPE_1_ACK	2
77
78#define	MTYPE_2		3
79#define	MTYPE_2_ACK	4
80
81int	sender_msqid = -1;
82pid_t	child_pid;
83
84key_t	msgkey;
85
86int
87main(int argc, char *argv[])
88{
89	struct sigaction sa;
90	struct msqid_ds m_ds;
91	struct test_mymsg m;
92	sigset_t sigmask;
93
94	if (argc != 2)
95		usage();
96
97	/*
98	 * Install a SIGSYS handler so that we can exit gracefully if
99	 * System V Message Queue support isn't in the kernel.
100	 */
101	sa.sa_handler = sigsys_handler;
102	sigemptyset(&sa.sa_mask);
103	sa.sa_flags = 0;
104	if (sigaction(SIGSYS, &sa, NULL) == -1)
105		err(1, "sigaction SIGSYS");
106
107	/*
108	 * Install and SIGCHLD handler to deal with all possible exit
109	 * conditions of the receiver.
110	 */
111	sa.sa_handler = sigchld_handler;
112	sigemptyset(&sa.sa_mask);
113	sa.sa_flags = 0;
114	if (sigaction(SIGCHLD, &sa, NULL) == -1)
115		err(1, "sigaction SIGCHLD");
116
117	msgkey = ftok(argv[1], 4160);
118
119	/*
120	 * Initialize child_pid to ourselves to that the cleanup function
121	 * works before we create the receiver.
122	 */
123	child_pid = getpid();
124
125	/*
126	 * Make sure that when the sender exits, the message queue is
127	 * removed.
128	 */
129	if (atexit(cleanup) == -1)
130		err(1, "atexit");
131
132	if ((sender_msqid = msgget(msgkey, IPC_CREAT | 0640)) == -1)
133		err(1, "msgget");
134
135	if (msgctl(sender_msqid, IPC_STAT, &m_ds) == -1)
136		err(1, "msgctl IPC_STAT");
137
138	print_msqid_ds(&m_ds, 0640);
139
140	m_ds.msg_perm.mode = (m_ds.msg_perm.mode & ~0777) | 0600;
141
142	if (msgctl(sender_msqid, IPC_SET, &m_ds) == -1)
143		err(1, "msgctl IPC_SET");
144
145	bzero(&m_ds, sizeof m_ds);
146
147	if (msgctl(sender_msqid, IPC_STAT, &m_ds) == -1)
148		err(1, "msgctl IPC_STAT");
149
150	if ((m_ds.msg_perm.mode & 0777) != 0600)
151		err(1, "IPC_SET of mode didn't hold");
152
153	print_msqid_ds(&m_ds, 0600);
154
155	switch ((child_pid = fork())) {
156	case -1:
157		err(1, "fork");
158		/* NOTREACHED */
159
160	case 0:
161		receiver();
162		break;
163
164	default:
165		break;
166	}
167
168	/*
169	 * Send the first message to the receiver and wait for the ACK.
170	 */
171	m.mtype = MTYPE_1;
172	strcpy(m.mtext, m1_str);
173	if (msgsnd(sender_msqid, &m, strlen(m1_str) + 1, 0) == -1)
174		err(1, "sender: msgsnd 1");
175
176	if (msgrcv(sender_msqid, &m, sizeof(m.mtext), MTYPE_1_ACK, 0) !=
177	    strlen(m1_str) + 1)
178		err(1, "sender: msgrcv 1 ack");
179
180	print_msqid_ds(&m_ds, 0600);
181
182	/*
183	 * Send the second message to the receiver and wait for the ACK.
184	 */
185	m.mtype = MTYPE_2;
186	strcpy(m.mtext, m2_str);
187	if (msgsnd(sender_msqid, &m, strlen(m2_str) + 1, 0) == -1)
188		err(1, "sender: msgsnd 2");
189
190	if (msgrcv(sender_msqid, &m, sizeof(m.mtext), MTYPE_2_ACK, 0) !=
191	    strlen(m2_str) + 1)
192		err(1, "sender: msgrcv 2 ack");
193
194	/*
195	 * Suspend forever; when we get SIGCHLD, the handler will exit.
196	 */
197	sigemptyset(&sigmask);
198	(void) sigsuspend(&sigmask);
199
200	/*
201	 * ...and any other signal is an unexpected error.
202	 */
203	errx(1, "sender: received unexpected signal");
204}
205
206void
207sigsys_handler(int signo)
208{
209
210	errx(1, "System V Message Queue support is not present in the kernel");
211}
212
213void
214sigchld_handler(int signo)
215{
216	struct msqid_ds m_ds;
217	int cstatus;
218
219	/*
220	 * Reap the child; if it exited successfully, then the test passed!
221	 */
222	if (waitpid(child_pid, &cstatus, 0) != child_pid)
223		err(1, "waitpid");
224
225	if (WIFEXITED(cstatus) == 0)
226		errx(1, "receiver exited abnormally");
227
228	if (WEXITSTATUS(cstatus) != 0)
229		errx(1, "receiver exited with status %d",
230		    WEXITSTATUS(cstatus));
231
232	/*
233	 * If we get here, the child has exited normally, and thus
234	 * we should exit normally too.  First, tho, we print out
235	 * the final stats for the message queue.
236	 */
237
238	if (msgctl(sender_msqid, IPC_STAT, &m_ds) == -1)
239		err(1, "msgctl IPC_STAT");
240
241	print_msqid_ds(&m_ds, 0600);
242
243	exit(0);
244}
245
246void
247cleanup()
248{
249
250	/*
251	 * If we're the sender, and it exists, remove the message queue.
252	 */
253	if (child_pid != 0 && sender_msqid != -1) {
254		if (msgctl(sender_msqid, IPC_RMID, NULL) == -1)
255			warn("msgctl IPC_RMID");
256	}
257}
258
259void
260print_msqid_ds(struct msqid_ds *mp, mode_t mode)
261{
262	uid_t uid = geteuid();
263	gid_t gid = getegid();
264
265	printf("PERM: uid %d, gid %d, cuid %d, cgid %d, mode 0%o\n",
266	    mp->msg_perm.uid, mp->msg_perm.gid,
267	    mp->msg_perm.cuid, mp->msg_perm.cgid,
268	    mp->msg_perm.mode & 0777);
269
270	printf("qnum %lu, qbytes %lu, lspid %d, lrpid %d\n",
271	    mp->msg_qnum, (u_long)mp->msg_qbytes, mp->msg_lspid,
272	    mp->msg_lrpid);
273
274	printf("stime: %s", ctime(&mp->msg_stime));
275	printf("rtime: %s", ctime(&mp->msg_rtime));
276	printf("ctime: %s", ctime(&mp->msg_ctime));
277
278	/*
279	 * Sanity check a few things.
280	 */
281
282	if (mp->msg_perm.uid != uid || mp->msg_perm.cuid != uid)
283		errx(1, "uid mismatch");
284
285	if (mp->msg_perm.gid != gid || mp->msg_perm.cgid != gid)
286		errx(1, "gid mismatch");
287
288	if ((mp->msg_perm.mode & 0777) != mode)
289		errx(1, "mode mismatch");
290}
291
292void
293usage()
294{
295
296	fprintf(stderr, "usage: %s keypath\n", getprogname());
297	exit(1);
298}
299
300void
301receiver()
302{
303	struct test_mymsg m;
304	int msqid;
305
306	if ((msqid = msgget(msgkey, 0)) == -1)
307		err(1, "receiver: msgget");
308
309	/*
310	 * Receive the first message, print it, and send an ACK.
311	 */
312
313	if (msgrcv(msqid, &m, sizeof(m.mtext), MTYPE_1, 0) !=
314	    strlen(m1_str) + 1)
315		err(1, "receiver: msgrcv 1");
316
317	printf("%s\n", m.mtext);
318	if (strcmp(m.mtext, m1_str) != 0)
319		err(1, "receiver: message 1 data isn't correct");
320
321	m.mtype = MTYPE_1_ACK;
322
323	if (msgsnd(msqid, &m, strlen(m1_str) + 1, 0) == -1)
324		err(1, "receiver: msgsnd ack 1");
325
326	/*
327	 * Receive the second message, print it, and send an ACK.
328	 */
329
330	if (msgrcv(msqid, &m, sizeof(m.mtext), MTYPE_2, 0) !=
331	    strlen(m2_str) + 1)
332		err(1, "receiver: msgrcv 2");
333
334	printf("%s\n", m.mtext);
335	if (strcmp(m.mtext, m2_str) != 0)
336		err(1, "receiver: message 2 data isn't correct");
337
338	m.mtype = MTYPE_2_ACK;
339
340	if (msgsnd(msqid, &m, strlen(m2_str) + 1, 0) == -1)
341		err(1, "receiver: msgsnd ack 2");
342
343	exit(0);
344}
345