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 * $DragonFly: src/tools/regression/sysvmsg/msgtest.c,v 1.1 2003/10/18 12:13:01 hmp Exp $
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
59 void print_msqid_ds (struct msqid_ds *, mode_t);
60 void sigsys_handler(int);
61 void sigchld_handler (int);
62 void cleanup (void);
63 void receiver (void);
64 void 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 */
74 struct test_mymsg {
75 long mtype;
76 char mtext[MESSAGE_TEXT_LEN];
77 };
78
79 const char *m1_str = "California is overrated.";
80 const 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
88 int sender_msqid = -1;
89 pid_t child_pid;
90
91 key_t msgkey;
92
93 int
main(int argc,char * argv[])94 main(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
211 void
sigsys_handler(int signo)212 sigsys_handler(int signo)
213 {
214
215 errx(1, "System V Message Queue support is not present in the kernel");
216 }
217
218 void
sigchld_handler(int signo)219 sigchld_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
251 void
cleanup()252 cleanup()
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
264 void
print_msqid_ds(struct msqid_ds * mp,mode_t mode)265 print_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
297 void
usage()298 usage()
299 {
300
301 fprintf(stderr, "usage: %s keypath\n", getprogname());
302 exit(1);
303 }
304
305 void
receiver()306 receiver()
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