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#ifdef __FreeBSD__ 51#include <limits.h> 52#endif 53 54#define MSG_KEY 1234 55#define MSG_MTYPE_1 0x41 56#define MSG_MTYPE_2 0x42 57#define MSG_MTYPE_3 0x43 58#define MSG_LEN 3 59 60struct msg { 61 long mtype; 62 char buf[MSG_LEN]; 63}; 64 65static void clean(void); 66 67static void 68clean(void) 69{ 70 int id; 71 72 if ((id = msgget(MSG_KEY, 0)) != -1) 73 (void)msgctl(id, IPC_RMID, 0); 74} 75 76ATF_TC_WITH_CLEANUP(msgrcv_basic); 77ATF_TC_HEAD(msgrcv_basic, tc) 78{ 79 atf_tc_set_md_var(tc, "descr", "A basic test of msgrcv(2)"); 80} 81 82ATF_TC_BODY(msgrcv_basic, tc) 83{ 84 struct msg msg1 = { MSG_MTYPE_1, { 'a', 'b', 'c' } }; 85 struct msg msg2 = { MSG_MTYPE_1, { 'x', 'y', 'z' } }; 86 int id; 87 88 id = msgget(MSG_KEY, IPC_CREAT | 0600); 89 ATF_REQUIRE(id != -1); 90 91 (void)msgsnd(id, &msg1, MSG_LEN, IPC_NOWAIT); 92 (void)msgrcv(id, &msg2, MSG_LEN, MSG_MTYPE_1, IPC_NOWAIT); 93 94 ATF_CHECK(msg1.buf[0] == msg2.buf[0]); 95 ATF_CHECK(msg1.buf[1] == msg2.buf[1]); 96 ATF_CHECK(msg1.buf[2] == msg2.buf[2]); 97 98 ATF_REQUIRE(msgctl(id, IPC_RMID, 0) == 0); 99} 100 101ATF_TC_CLEANUP(msgrcv_basic, tc) 102{ 103 clean(); 104} 105 106ATF_TC_WITH_CLEANUP(msgrcv_block); 107ATF_TC_HEAD(msgrcv_block, tc) 108{ 109 atf_tc_set_md_var(tc, "descr", "Test that msgrcv(2) blocks"); 110} 111 112ATF_TC_BODY(msgrcv_block, tc) 113{ 114 struct msg msg = { MSG_MTYPE_1, { 'a', 'b', 'c' } }; 115 int id, sta; 116 pid_t pid; 117 118 id = msgget(MSG_KEY, IPC_CREAT | 0600); 119 ATF_REQUIRE(id != -1); 120 121 pid = fork(); 122 ATF_REQUIRE(pid >= 0); 123 124 if (pid == 0) { 125 126 if (msgrcv(id, &msg, MSG_LEN, MSG_MTYPE_1, 0) < 0) 127 _exit(EXIT_FAILURE); 128 129 _exit(EXIT_SUCCESS); 130 } 131 132 /* 133 * Below msgsnd(2) should unblock the child, 134 * and hence kill(2) should fail with ESRCH. 135 */ 136 (void)sleep(1); 137 (void)msgsnd(id, &msg, MSG_LEN, IPC_NOWAIT); 138 (void)sleep(1); 139 (void)kill(pid, SIGKILL); 140 (void)wait(&sta); 141 142 if (WIFEXITED(sta) == 0 || WIFSIGNALED(sta) != 0) 143 atf_tc_fail("msgrcv(2) did not block"); 144 145 ATF_REQUIRE(msgctl(id, IPC_RMID, 0) == 0); 146} 147 148ATF_TC_CLEANUP(msgrcv_block, tc) 149{ 150 clean(); 151} 152 153ATF_TC_WITH_CLEANUP(msgrcv_err); 154ATF_TC_HEAD(msgrcv_err, tc) 155{ 156 atf_tc_set_md_var(tc, "descr", "Test errors from msgrcv(2)"); 157} 158 159ATF_TC_BODY(msgrcv_err, tc) 160{ 161 struct msg msg = { MSG_MTYPE_1, { 'a', 'b', 'c' } }; 162 int id, r = 0; 163 164 id = msgget(MSG_KEY, IPC_CREAT | 0600); 165 ATF_REQUIRE(id != -1); 166 167 errno = 0; 168 169 ATF_REQUIRE_ERRNO(ENOMSG, msgrcv(id, &msg, 170 MSG_LEN, MSG_MTYPE_1, IPC_NOWAIT) == -1); 171 172 ATF_REQUIRE(msgsnd(id, &msg, MSG_LEN, IPC_NOWAIT) == 0); 173 174 errno = 0; 175 176 ATF_REQUIRE_ERRNO(EFAULT, msgrcv(id, (void *)-1, 177 MSG_LEN, MSG_MTYPE_1, IPC_NOWAIT) == -1); 178 179 errno = 0; 180 181 ATF_REQUIRE_ERRNO(EINVAL, msgrcv(-1, &msg, 182 MSG_LEN, MSG_MTYPE_1, IPC_NOWAIT) == -1); 183 184 errno = 0; 185 186 ATF_REQUIRE_ERRNO(EINVAL, msgrcv(-1, &msg, 187 SSIZE_MAX, MSG_MTYPE_1, IPC_NOWAIT) == -1); 188 189 ATF_REQUIRE(msgsnd(id, &msg, MSG_LEN, IPC_NOWAIT) == 0); 190 191 errno = 0; 192 193 ATF_REQUIRE_ERRNO(E2BIG, msgrcv(id, &r, 194 MSG_LEN - 1, MSG_MTYPE_1, IPC_NOWAIT) == -1); 195 196 ATF_REQUIRE(msgctl(id, IPC_RMID, 0) == 0); 197} 198 199ATF_TC_CLEANUP(msgrcv_err, tc) 200{ 201 clean(); 202} 203 204 205ATF_TC_WITH_CLEANUP(msgrcv_mtype); 206ATF_TC_HEAD(msgrcv_mtype, tc) 207{ 208 atf_tc_set_md_var(tc, "descr", "Test message types with msgrcv(2)"); 209} 210 211ATF_TC_BODY(msgrcv_mtype, tc) 212{ 213 struct msg msg1 = { MSG_MTYPE_1, { 'a', 'b', 'c' } }; 214 struct msg msg2 = { MSG_MTYPE_3, { 'x', 'y', 'z' } }; 215 int id; 216 217 id = msgget(MSG_KEY, IPC_CREAT | 0600); 218 ATF_REQUIRE(id != -1); 219 220 (void)msgsnd(id, &msg1, MSG_LEN, IPC_NOWAIT); 221 (void)msgrcv(id, &msg2, MSG_LEN, MSG_MTYPE_2, IPC_NOWAIT); 222 223 ATF_CHECK(msg1.buf[0] != msg2.buf[0]); /* Different mtype. */ 224 ATF_CHECK(msg1.buf[1] != msg2.buf[1]); 225 ATF_CHECK(msg1.buf[2] != msg2.buf[2]); 226 227 (void)msgrcv(id, &msg2, MSG_LEN, MSG_MTYPE_1, IPC_NOWAIT); 228 229 ATF_CHECK(msg1.buf[0] == msg2.buf[0]); /* Same mtype. */ 230 ATF_CHECK(msg1.buf[1] == msg2.buf[1]); 231 ATF_CHECK(msg1.buf[2] == msg2.buf[2]); 232 233 ATF_REQUIRE(msgctl(id, IPC_RMID, 0) == 0); 234} 235 236ATF_TC_CLEANUP(msgrcv_mtype, tc) 237{ 238 clean(); 239} 240 241ATF_TC_WITH_CLEANUP(msgrcv_nonblock); 242ATF_TC_HEAD(msgrcv_nonblock, tc) 243{ 244 atf_tc_set_md_var(tc, "descr", "Test msgrcv(2) with IPC_NOWAIT"); 245 atf_tc_set_md_var(tc, "timeout", "10"); 246} 247 248ATF_TC_BODY(msgrcv_nonblock, tc) 249{ 250 struct msg msg = { MSG_MTYPE_1, { 'a', 'b', 'c' } }; 251 const ssize_t n = 10; 252 int id, sta; 253 ssize_t i; 254 pid_t pid; 255 256 id = msgget(MSG_KEY, IPC_CREAT | 0600); 257 ATF_REQUIRE(id != -1); 258 259 for (i = 0; i < n; i++) { 260 261 ATF_REQUIRE(msgsnd(id, &msg, MSG_LEN, IPC_NOWAIT) == 0); 262 } 263 264 pid = fork(); 265 ATF_REQUIRE(pid >= 0); 266 267 if (pid == 0) { 268 269 while (i != 0) { 270 271 if (msgrcv(id, &msg, MSG_LEN, MSG_MTYPE_1, 272 IPC_NOWAIT) == -1) 273 _exit(EXIT_FAILURE); 274 275 i--; 276 } 277 278 _exit(EXIT_SUCCESS); 279 } 280 281 (void)sleep(2); 282 (void)kill(pid, SIGKILL); 283 (void)wait(&sta); 284 285 if (WIFSIGNALED(sta) != 0 || WTERMSIG(sta) == SIGKILL) 286 atf_tc_fail("msgrcv(2) blocked with IPC_NOWAIT"); 287 288 if (WIFEXITED(sta) == 0 && WEXITSTATUS(sta) != EXIT_SUCCESS) 289 atf_tc_fail("msgrcv(2) failed"); 290 291 ATF_REQUIRE(msgctl(id, IPC_RMID, 0) == 0); 292} 293 294ATF_TC_CLEANUP(msgrcv_nonblock, tc) 295{ 296 clean(); 297} 298 299ATF_TC_WITH_CLEANUP(msgrcv_truncate); 300ATF_TC_HEAD(msgrcv_truncate, tc) 301{ 302 atf_tc_set_md_var(tc, "descr", "Test msgrcv(2) with MSG_NOERROR"); 303} 304 305ATF_TC_BODY(msgrcv_truncate, tc) 306{ 307#define MSG_SMALLLEN 2 308 struct msgsmall { 309 long mtype; 310 char buf[MSG_SMALLLEN]; 311 }; 312 313 struct msg msg1 = { MSG_MTYPE_1, { 'a', 'b', 'c' } }; 314 struct msgsmall msg2 = { MSG_MTYPE_1, { 'x', 'y' } }; 315 int id; 316 317 id = msgget(MSG_KEY, IPC_CREAT | 0600); 318 ATF_REQUIRE(id != -1); 319 320 (void)msgsnd(id, &msg1, MSG_LEN, IPC_NOWAIT); 321 (void)msgrcv(id, &msg2, MSG_SMALLLEN, 322 MSG_MTYPE_1, IPC_NOWAIT | MSG_NOERROR); 323 324 ATF_CHECK(msg1.buf[0] == msg2.buf[0]); 325 ATF_CHECK(msg1.buf[1] == msg2.buf[1]); 326 327 ATF_REQUIRE(msgctl(id, IPC_RMID, 0) == 0); 328} 329 330ATF_TC_CLEANUP(msgrcv_truncate, tc) 331{ 332 clean(); 333} 334 335ATF_TP_ADD_TCS(tp) 336{ 337 338 ATF_TP_ADD_TC(tp, msgrcv_basic); 339 ATF_TP_ADD_TC(tp, msgrcv_block); 340 ATF_TP_ADD_TC(tp, msgrcv_err); 341 ATF_TP_ADD_TC(tp, msgrcv_mtype); 342 ATF_TP_ADD_TC(tp, msgrcv_nonblock); 343 ATF_TP_ADD_TC(tp, msgrcv_truncate); 344 345 return atf_no_error(); 346} 347