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
52 void print_msqid_ds (struct msqid_ds *, mode_t);
53 void sigsys_handler(int);
54 void sigchld_handler (int);
55 void cleanup (void);
56 void receiver (void);
57 void 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 */
67 struct test_mymsg {
68 long mtype;
69 char mtext[MESSAGE_TEXT_LEN];
70 };
71
72 const char *m1_str = "California is overrated.";
73 const 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
81 int sender_msqid = -1;
82 pid_t child_pid;
83
84 key_t msgkey;
85
86 int
main(int argc,char * argv[])87 main(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
206 void
sigsys_handler(int signo)207 sigsys_handler(int signo)
208 {
209
210 errx(1, "System V Message Queue support is not present in the kernel");
211 }
212
213 void
sigchld_handler(int signo)214 sigchld_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
246 void
cleanup()247 cleanup()
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
259 void
print_msqid_ds(struct msqid_ds * mp,mode_t mode)260 print_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
292 void
usage()293 usage()
294 {
295
296 fprintf(stderr, "usage: %s keypath\n", getprogname());
297 exit(1);
298 }
299
300 void
receiver()301 receiver()
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