1 /* $NetBSD: t_msgrcv.c,v 1.5 2017/10/08 08:31:05 kre Exp $ */ 2 3 /*- 4 * Copyright (c) 2011 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jukka Ruohonen. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 #include <sys/cdefs.h> 32 __RCSID("$NetBSD: t_msgrcv.c,v 1.5 2017/10/08 08:31:05 kre Exp $"); 33 34 #include <sys/msg.h> 35 #include <sys/stat.h> 36 #include <sys/sysctl.h> 37 #include <sys/wait.h> 38 39 #include <atf-c.h> 40 #include <errno.h> 41 #include <limits.h> 42 #include <pwd.h> 43 #include <signal.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include <sysexits.h> 48 #include <time.h> 49 #include <unistd.h> 50 51 #define MSG_KEY 1234 52 #define MSG_MTYPE_1 0x41 53 #define MSG_MTYPE_2 0x42 54 #define MSG_MTYPE_3 0x43 55 #define MSG_LEN 3 56 57 struct msg { 58 long mtype; 59 char buf[MSG_LEN]; 60 }; 61 62 static void clean(void); 63 64 static void 65 clean(void) 66 { 67 int id; 68 69 if ((id = msgget(MSG_KEY, 0)) != -1) 70 (void)msgctl(id, IPC_RMID, 0); 71 } 72 73 ATF_TC_WITH_CLEANUP(msgrcv_basic); 74 ATF_TC_HEAD(msgrcv_basic, tc) 75 { 76 atf_tc_set_md_var(tc, "descr", "A basic test of msgrcv(2)"); 77 } 78 79 ATF_TC_BODY(msgrcv_basic, tc) 80 { 81 struct msg msg1 = { MSG_MTYPE_1, { 'a', 'b', 'c' } }; 82 struct msg msg2 = { MSG_MTYPE_1, { 'x', 'y', 'z' } }; 83 int id; 84 85 id = msgget(MSG_KEY, IPC_CREAT | 0600); 86 ATF_REQUIRE(id != -1); 87 88 (void)msgsnd(id, &msg1, MSG_LEN, IPC_NOWAIT); 89 (void)msgrcv(id, &msg2, MSG_LEN, MSG_MTYPE_1, IPC_NOWAIT); 90 91 ATF_CHECK(msg1.buf[0] == msg2.buf[0]); 92 ATF_CHECK(msg1.buf[1] == msg2.buf[1]); 93 ATF_CHECK(msg1.buf[2] == msg2.buf[2]); 94 95 ATF_REQUIRE(msgctl(id, IPC_RMID, 0) == 0); 96 } 97 98 ATF_TC_CLEANUP(msgrcv_basic, tc) 99 { 100 clean(); 101 } 102 103 ATF_TC_WITH_CLEANUP(msgrcv_block); 104 ATF_TC_HEAD(msgrcv_block, tc) 105 { 106 atf_tc_set_md_var(tc, "descr", "Test that msgrcv(2) blocks"); 107 } 108 109 ATF_TC_BODY(msgrcv_block, tc) 110 { 111 struct msg msg = { MSG_MTYPE_1, { 'a', 'b', 'c' } }; 112 int id, sta; 113 pid_t pid; 114 115 id = msgget(MSG_KEY, IPC_CREAT | 0600); 116 ATF_REQUIRE(id != -1); 117 118 pid = fork(); 119 ATF_REQUIRE(pid >= 0); 120 121 if (pid == 0) { 122 123 if (msgrcv(id, &msg, MSG_LEN, MSG_MTYPE_1, 0) < 0) 124 _exit(EXIT_FAILURE); 125 126 _exit(EXIT_SUCCESS); 127 } 128 129 /* 130 * Below msgsnd(2) should unblock the child, 131 * and hence kill(2) should fail with ESRCH. 132 */ 133 (void)sleep(1); 134 (void)msgsnd(id, &msg, MSG_LEN, IPC_NOWAIT); 135 (void)sleep(1); 136 (void)kill(pid, SIGKILL); 137 (void)wait(&sta); 138 139 if (WIFEXITED(sta) == 0 || WIFSIGNALED(sta) != 0) 140 atf_tc_fail("msgrcv(2) did not block"); 141 142 ATF_REQUIRE(msgctl(id, IPC_RMID, 0) == 0); 143 } 144 145 ATF_TC_CLEANUP(msgrcv_block, tc) 146 { 147 clean(); 148 } 149 150 ATF_TC_WITH_CLEANUP(msgrcv_err); 151 ATF_TC_HEAD(msgrcv_err, tc) 152 { 153 atf_tc_set_md_var(tc, "descr", "Test errors from msgrcv(2)"); 154 } 155 156 ATF_TC_BODY(msgrcv_err, tc) 157 { 158 struct msg msg = { MSG_MTYPE_1, { 'a', 'b', 'c' } }; 159 int id, r = 0; 160 161 id = msgget(MSG_KEY, IPC_CREAT | 0600); 162 ATF_REQUIRE(id != -1); 163 164 errno = 0; 165 166 ATF_REQUIRE_ERRNO(ENOMSG, msgrcv(id, &msg, 167 MSG_LEN, MSG_MTYPE_1, IPC_NOWAIT) == -1); 168 169 ATF_REQUIRE(msgsnd(id, &msg, MSG_LEN, IPC_NOWAIT) == 0); 170 171 errno = 0; 172 173 ATF_REQUIRE_ERRNO(EFAULT, msgrcv(id, (void *)-1, 174 MSG_LEN, MSG_MTYPE_1, IPC_NOWAIT) == -1); 175 176 errno = 0; 177 178 ATF_REQUIRE_ERRNO(EINVAL, msgrcv(-1, &msg, 179 MSG_LEN, MSG_MTYPE_1, IPC_NOWAIT) == -1); 180 181 errno = 0; 182 183 ATF_REQUIRE_ERRNO(EINVAL, msgrcv(-1, &msg, 184 SSIZE_MAX, MSG_MTYPE_1, IPC_NOWAIT) == -1); 185 186 ATF_REQUIRE(msgsnd(id, &msg, MSG_LEN, IPC_NOWAIT) == 0); 187 188 errno = 0; 189 190 ATF_REQUIRE_ERRNO(E2BIG, msgrcv(id, &r, 191 MSG_LEN - 1, MSG_MTYPE_1, IPC_NOWAIT) == -1); 192 193 ATF_REQUIRE(msgctl(id, IPC_RMID, 0) == 0); 194 } 195 196 ATF_TC_CLEANUP(msgrcv_err, tc) 197 { 198 clean(); 199 } 200 201 202 ATF_TC_WITH_CLEANUP(msgrcv_mtype); 203 ATF_TC_HEAD(msgrcv_mtype, tc) 204 { 205 atf_tc_set_md_var(tc, "descr", "Test message types with msgrcv(2)"); 206 } 207 208 ATF_TC_BODY(msgrcv_mtype, tc) 209 { 210 struct msg msg1 = { MSG_MTYPE_1, { 'a', 'b', 'c' } }; 211 struct msg msg2 = { MSG_MTYPE_3, { 'x', 'y', 'z' } }; 212 int id; 213 214 id = msgget(MSG_KEY, IPC_CREAT | 0600); 215 ATF_REQUIRE(id != -1); 216 217 (void)msgsnd(id, &msg1, MSG_LEN, IPC_NOWAIT); 218 (void)msgrcv(id, &msg2, MSG_LEN, MSG_MTYPE_2, IPC_NOWAIT); 219 220 ATF_CHECK(msg1.buf[0] != msg2.buf[0]); /* Different mtype. */ 221 ATF_CHECK(msg1.buf[1] != msg2.buf[1]); 222 ATF_CHECK(msg1.buf[2] != msg2.buf[2]); 223 224 (void)msgrcv(id, &msg2, MSG_LEN, MSG_MTYPE_1, IPC_NOWAIT); 225 226 ATF_CHECK(msg1.buf[0] == msg2.buf[0]); /* Same mtype. */ 227 ATF_CHECK(msg1.buf[1] == msg2.buf[1]); 228 ATF_CHECK(msg1.buf[2] == msg2.buf[2]); 229 230 ATF_REQUIRE(msgctl(id, IPC_RMID, 0) == 0); 231 } 232 233 ATF_TC_CLEANUP(msgrcv_mtype, tc) 234 { 235 clean(); 236 } 237 238 ATF_TC_WITH_CLEANUP(msgrcv_nonblock); 239 ATF_TC_HEAD(msgrcv_nonblock, tc) 240 { 241 atf_tc_set_md_var(tc, "descr", "Test msgrcv(2) with IPC_NOWAIT"); 242 atf_tc_set_md_var(tc, "timeout", "10"); 243 } 244 245 ATF_TC_BODY(msgrcv_nonblock, tc) 246 { 247 struct msg msg = { MSG_MTYPE_1, { 'a', 'b', 'c' } }; 248 const ssize_t n = 10; 249 int id, sta; 250 ssize_t i; 251 pid_t pid; 252 253 id = msgget(MSG_KEY, IPC_CREAT | 0600); 254 ATF_REQUIRE(id != -1); 255 256 for (i = 0; i < n; i++) { 257 258 ATF_REQUIRE(msgsnd(id, &msg, MSG_LEN, IPC_NOWAIT) == 0); 259 } 260 261 pid = fork(); 262 ATF_REQUIRE(pid >= 0); 263 264 if (pid == 0) { 265 266 while (i != 0) { 267 268 if (msgrcv(id, &msg, MSG_LEN, MSG_MTYPE_1, 269 IPC_NOWAIT) == -1) 270 _exit(EXIT_FAILURE); 271 272 i--; 273 } 274 275 _exit(EXIT_SUCCESS); 276 } 277 278 (void)sleep(2); 279 (void)kill(pid, SIGKILL); 280 (void)wait(&sta); 281 282 if (WIFSIGNALED(sta) != 0 || WTERMSIG(sta) == SIGKILL) 283 atf_tc_fail("msgrcv(2) blocked with IPC_NOWAIT"); 284 285 if (WIFEXITED(sta) == 0 && WEXITSTATUS(sta) != EXIT_SUCCESS) 286 atf_tc_fail("msgrcv(2) failed"); 287 288 ATF_REQUIRE(msgctl(id, IPC_RMID, 0) == 0); 289 } 290 291 ATF_TC_CLEANUP(msgrcv_nonblock, tc) 292 { 293 clean(); 294 } 295 296 ATF_TC_WITH_CLEANUP(msgrcv_truncate); 297 ATF_TC_HEAD(msgrcv_truncate, tc) 298 { 299 atf_tc_set_md_var(tc, "descr", "Test msgrcv(2) with MSG_NOERROR"); 300 } 301 302 ATF_TC_BODY(msgrcv_truncate, tc) 303 { 304 #define MSG_SMALLLEN 2 305 struct msgsmall { 306 long mtype; 307 char buf[MSG_SMALLLEN]; 308 }; 309 310 struct msg msg1 = { MSG_MTYPE_1, { 'a', 'b', 'c' } }; 311 struct msgsmall msg2 = { MSG_MTYPE_1, { 'x', 'y' } }; 312 int id; 313 314 id = msgget(MSG_KEY, IPC_CREAT | 0600); 315 ATF_REQUIRE(id != -1); 316 317 (void)msgsnd(id, &msg1, MSG_LEN, IPC_NOWAIT); 318 (void)msgrcv(id, &msg2, MSG_SMALLLEN, 319 MSG_MTYPE_1, IPC_NOWAIT | MSG_NOERROR); 320 321 ATF_CHECK(msg1.buf[0] == msg2.buf[0]); 322 ATF_CHECK(msg1.buf[1] == msg2.buf[1]); 323 324 ATF_REQUIRE(msgctl(id, IPC_RMID, 0) == 0); 325 } 326 327 ATF_TC_CLEANUP(msgrcv_truncate, tc) 328 { 329 clean(); 330 } 331 332 static volatile int sig_caught; 333 334 static void 335 sigsys_handler(int signum) 336 { 337 338 sig_caught = signum; 339 } 340 341 static int 342 no_kernel_sysvmsg(void) 343 { 344 int id; 345 void (*osig)(int); 346 347 sig_caught = 0; 348 osig = signal(SIGSYS, sigsys_handler); 349 id = msgget(MSG_KEY, IPC_CREAT | 0600); 350 if (sig_caught || id == -1) 351 return 1; 352 353 (void)msgctl(id, IPC_RMID, 0); 354 (void)signal(SIGSYS, osig); 355 356 return 0; 357 } 358 359 ATF_TC(msgrcv_query); 360 ATF_TC_HEAD(msgrcv_query, tc) 361 { 362 atf_tc_set_md_var(tc, "descr", "Skip msgrcv_* tests - no SYSVMSG"); 363 } 364 ATF_TC_BODY(msgrcv_query, tc) 365 { 366 atf_tc_skip("No SYSVMSG in kernel"); 367 } 368 369 ATF_TP_ADD_TCS(tp) 370 { 371 372 if (no_kernel_sysvmsg()) { 373 ATF_TP_ADD_TC(tp, msgrcv_query); 374 } else { 375 ATF_TP_ADD_TC(tp, msgrcv_basic); 376 ATF_TP_ADD_TC(tp, msgrcv_block); 377 ATF_TP_ADD_TC(tp, msgrcv_err); 378 ATF_TP_ADD_TC(tp, msgrcv_mtype); 379 ATF_TP_ADD_TC(tp, msgrcv_nonblock); 380 ATF_TP_ADD_TC(tp, msgrcv_truncate); 381 } 382 383 return atf_no_error(); 384 } 385
Indexes created Sat Sep 20 22:09:52 GMT 2025