tools/regression/sysvmsg/msgtest.c

   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
  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
 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
 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
 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
 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
 298 usage()
 299 {
 300
 301         fprintf(stderr, "usage: %s keypath\n", getprogname());
 302         exit(1);
 303 }
 304
 305 void
 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 }