1 /* $NetBSD: t_msgrcv.c,v 1.3 2013/07/24 11:44:10 skrll 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 1.3 2013/07/24 11:44:10 skrll 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 <pwd.h> 42 #include <signal.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <sysexits.h> 47 #include <time.h> 48 #include <unistd.h> 49 50 #define MSG_KEY 1234 51 #define MSG_MTYPE_1 0x41 52 #define MSG_MTYPE_2 0x42 53 #define MSG_MTYPE_3 0x43 54 #define MSG_LEN 3 55 56 struct msg { 57 long mtype; 58 char buf[MSG_LEN]; 59 }; 60 61 static void clean(void); 62 63 static void 64 clean(void) 65 { 66 int id; 67 68 if ((id = msgget(MSG_KEY, 0)) != -1) 69 (void)msgctl(id, IPC_RMID, 0); 70 } 71 72 ATF_TC_WITH_CLEANUP(msgrcv_basic); 73 ATF_TC_HEAD(msgrcv_basic, tc) 74 { 75 atf_tc_set_md_var(tc, "descr", "A basic test of msgrcv(2)"); 76 } 77 78 ATF_TC_BODY(msgrcv_basic, tc) 79 { 80 struct msg msg1 = { MSG_MTYPE_1, { 'a', 'b', 'c' } }; 81 struct msg msg2 = { MSG_MTYPE_1, { 'x', 'y', 'z' } }; 82 int id; 83 84 id = msgget(MSG_KEY, IPC_CREAT | 0600); 85 ATF_REQUIRE(id != -1); 86 87 (void)msgsnd(id, &msg1, MSG_LEN, IPC_NOWAIT); 88 (void)msgrcv(id, &msg2, MSG_LEN, MSG_MTYPE_1, IPC_NOWAIT); 89 90 ATF_CHECK(msg1.buf[0] == msg2.buf[0]); 91 ATF_CHECK(msg1.buf[1] == msg2.buf[1]); 92 ATF_CHECK(msg1.buf[2] == msg2.buf[2]); 93 94 ATF_REQUIRE(msgctl(id, IPC_RMID, 0) == 0); 95 } 96 97 ATF_TC_CLEANUP(msgrcv_basic, tc) 98 { 99 clean(); 100 } 101 102 ATF_TC_WITH_CLEANUP(msgrcv_block); 103 ATF_TC_HEAD(msgrcv_block, tc) 104 { 105 atf_tc_set_md_var(tc, "descr", "Test that msgrcv(2) blocks"); 106 } 107 108 ATF_TC_BODY(msgrcv_block, tc) 109 { 110 struct msg msg = { MSG_MTYPE_1, { 'a', 'b', 'c' } }; 111 int id, sta; 112 pid_t pid; 113 114 id = msgget(MSG_KEY, IPC_CREAT | 0600); 115 ATF_REQUIRE(id != -1); 116 117 pid = fork(); 118 ATF_REQUIRE(pid >= 0); 119 120 if (pid == 0) { 121 122 if (msgrcv(id, &msg, MSG_LEN, MSG_MTYPE_1, 0) < 0) 123 _exit(EXIT_FAILURE); 124 125 _exit(EXIT_SUCCESS); 126 } 127 128 /* 129 * Below msgsnd(2) should unblock the child, 130 * and hence kill(2) should fail with ESRCH. 131 */ 132 (void)sleep(1); 133 (void)msgsnd(id, &msg, MSG_LEN, IPC_NOWAIT); 134 (void)sleep(1); 135 (void)kill(pid, SIGKILL); 136 (void)wait(&sta); 137 138 if (WIFEXITED(sta) == 0 || WIFSIGNALED(sta) != 0) 139 atf_tc_fail("msgrcv(2) did not block"); 140 141 ATF_REQUIRE(msgctl(id, IPC_RMID, 0) == 0); 142 } 143 144 ATF_TC_CLEANUP(msgrcv_block, tc) 145 { 146 clean(); 147 } 148 149 ATF_TC_WITH_CLEANUP(msgrcv_err); 150 ATF_TC_HEAD(msgrcv_err, tc) 151 { 152 atf_tc_set_md_var(tc, "descr", "Test errors from msgrcv(2)"); 153 } 154 155 ATF_TC_BODY(msgrcv_err, tc) 156 { 157 struct msg msg = { MSG_MTYPE_1, { 'a', 'b', 'c' } }; 158 int id, r = 0; 159 160 id = msgget(MSG_KEY, IPC_CREAT | 0600); 161 ATF_REQUIRE(id != -1); 162 163 errno = 0; 164 165 ATF_REQUIRE_ERRNO(ENOMSG, msgrcv(id, &msg, 166 MSG_LEN, MSG_MTYPE_1, IPC_NOWAIT) == -1); 167 168 ATF_REQUIRE(msgsnd(id, &msg, MSG_LEN, IPC_NOWAIT) == 0); 169 170 errno = 0; 171 172 ATF_REQUIRE_ERRNO(EFAULT, msgrcv(id, (void *)-1, 173 MSG_LEN, MSG_MTYPE_1, IPC_NOWAIT) == -1); 174 175 errno = 0; 176 177 ATF_REQUIRE_ERRNO(EINVAL, msgrcv(-1, &msg, 178 MSG_LEN, MSG_MTYPE_1, IPC_NOWAIT) == -1); 179 180 errno = 0; 181 182 ATF_REQUIRE_ERRNO(EINVAL, msgrcv(-1, &msg, 183 SSIZE_MAX, MSG_MTYPE_1, IPC_NOWAIT) == -1); 184 185 ATF_REQUIRE(msgsnd(id, &msg, MSG_LEN, IPC_NOWAIT) == 0); 186 187 errno = 0; 188 189 ATF_REQUIRE_ERRNO(E2BIG, msgrcv(id, &r, 190 MSG_LEN - 1, MSG_MTYPE_1, IPC_NOWAIT) == -1); 191 192 ATF_REQUIRE(msgctl(id, IPC_RMID, 0) == 0); 193 } 194 195 ATF_TC_CLEANUP(msgrcv_err, tc) 196 { 197 clean(); 198 } 199 200 201 ATF_TC_WITH_CLEANUP(msgrcv_mtype); 202 ATF_TC_HEAD(msgrcv_mtype, tc) 203 { 204 atf_tc_set_md_var(tc, "descr", "Test message types with msgrcv(2)"); 205 } 206 207 ATF_TC_BODY(msgrcv_mtype, tc) 208 { 209 struct msg msg1 = { MSG_MTYPE_1, { 'a', 'b', 'c' } }; 210 struct msg msg2 = { MSG_MTYPE_3, { 'x', 'y', 'z' } }; 211 int id; 212 213 id = msgget(MSG_KEY, IPC_CREAT | 0600); 214 ATF_REQUIRE(id != -1); 215 216 (void)msgsnd(id, &msg1, MSG_LEN, IPC_NOWAIT); 217 (void)msgrcv(id, &msg2, MSG_LEN, MSG_MTYPE_2, IPC_NOWAIT); 218 219 ATF_CHECK(msg1.buf[0] != msg2.buf[0]); /* Different mtype. */ 220 ATF_CHECK(msg1.buf[1] != msg2.buf[1]); 221 ATF_CHECK(msg1.buf[2] != msg2.buf[2]); 222 223 (void)msgrcv(id, &msg2, MSG_LEN, MSG_MTYPE_1, IPC_NOWAIT); 224 225 ATF_CHECK(msg1.buf[0] == msg2.buf[0]); /* Same mtype. */ 226 ATF_CHECK(msg1.buf[1] == msg2.buf[1]); 227 ATF_CHECK(msg1.buf[2] == msg2.buf[2]); 228 229 ATF_REQUIRE(msgctl(id, IPC_RMID, 0) == 0); 230 } 231 232 ATF_TC_CLEANUP(msgrcv_mtype, tc) 233 { 234 clean(); 235 } 236 237 ATF_TC_WITH_CLEANUP(msgrcv_nonblock); 238 ATF_TC_HEAD(msgrcv_nonblock, tc) 239 { 240 atf_tc_set_md_var(tc, "descr", "Test msgrcv(2) with IPC_NOWAIT"); 241 atf_tc_set_md_var(tc, "timeout", "10"); 242 } 243 244 ATF_TC_BODY(msgrcv_nonblock, tc) 245 { 246 struct msg msg = { MSG_MTYPE_1, { 'a', 'b', 'c' } }; 247 const ssize_t n = 10; 248 int id, sta; 249 ssize_t i; 250 pid_t pid; 251 252 id = msgget(MSG_KEY, IPC_CREAT | 0600); 253 ATF_REQUIRE(id != -1); 254 255 for (i = 0; i < n; i++) { 256 257 ATF_REQUIRE(msgsnd(id, &msg, MSG_LEN, IPC_NOWAIT) == 0); 258 } 259 260 pid = fork(); 261 ATF_REQUIRE(pid >= 0); 262 263 if (pid == 0) { 264 265 while (i != 0) { 266 267 if (msgrcv(id, &msg, MSG_LEN, MSG_MTYPE_1, 268 IPC_NOWAIT) == -1) 269 _exit(EXIT_FAILURE); 270 271 i--; 272 } 273 274 _exit(EXIT_SUCCESS); 275 } 276 277 (void)sleep(2); 278 (void)kill(pid, SIGKILL); 279 (void)wait(&sta); 280 281 if (WIFSIGNALED(sta) != 0 || WTERMSIG(sta) == SIGKILL) 282 atf_tc_fail("msgrcv(2) blocked with IPC_NOWAIT"); 283 284 if (WIFEXITED(sta) == 0 && WEXITSTATUS(sta) != EXIT_SUCCESS) 285 atf_tc_fail("msgrcv(2) failed"); 286 287 ATF_REQUIRE(msgctl(id, IPC_RMID, 0) == 0); 288 } 289 290 ATF_TC_CLEANUP(msgrcv_nonblock, tc) 291 { 292 clean(); 293 } 294 295 ATF_TC_WITH_CLEANUP(msgrcv_truncate); 296 ATF_TC_HEAD(msgrcv_truncate, tc) 297 { 298 atf_tc_set_md_var(tc, "descr", "Test msgrcv(2) with MSG_NOERROR"); 299 } 300 301 ATF_TC_BODY(msgrcv_truncate, tc) 302 { 303 #define MSG_SMALLLEN 2 304 struct msgsmall { 305 long mtype; 306 char buf[MSG_SMALLLEN]; 307 }; 308 309 struct msg msg1 = { MSG_MTYPE_1, { 'a', 'b', 'c' } }; 310 struct msgsmall msg2 = { MSG_MTYPE_1, { 'x', 'y' } }; 311 int id; 312 313 id = msgget(MSG_KEY, IPC_CREAT | 0600); 314 ATF_REQUIRE(id != -1); 315 316 (void)msgsnd(id, &msg1, MSG_LEN, IPC_NOWAIT); 317 (void)msgrcv(id, &msg2, MSG_SMALLLEN, 318 MSG_MTYPE_1, IPC_NOWAIT | MSG_NOERROR); 319 320 ATF_CHECK(msg1.buf[0] == msg2.buf[0]); 321 ATF_CHECK(msg1.buf[1] == msg2.buf[1]); 322 323 ATF_REQUIRE(msgctl(id, IPC_RMID, 0) == 0); 324 } 325 326 ATF_TC_CLEANUP(msgrcv_truncate, tc) 327 { 328 clean(); 329 } 330 331 ATF_TP_ADD_TCS(tp) 332 { 333 334 ATF_TP_ADD_TC(tp, msgrcv_basic); 335 ATF_TP_ADD_TC(tp, msgrcv_block); 336 ATF_TP_ADD_TC(tp, msgrcv_err); 337 ATF_TP_ADD_TC(tp, msgrcv_mtype); 338 ATF_TP_ADD_TC(tp, msgrcv_nonblock); 339 ATF_TP_ADD_TC(tp, msgrcv_truncate); 340 341 return atf_no_error(); 342 } 343