1 /* $NetBSD: t_sigqueue.c,v 1.6 2016/08/04 06:43:43 christos 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 Christos Zoulas. 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 32 #include <sys/cdefs.h> 33 __RCSID("$NetBSD: t_sigqueue.c,v 1.6 2016/08/04 06:43:43 christos Exp $"); 34 35 #include <atf-c.h> 36 #include <errno.h> 37 #include <signal.h> 38 #include <stdlib.h> 39 #include <sched.h> 40 #include <unistd.h> 41 42 #ifdef __FreeBSD__ 43 #include <err.h> 44 #include <stdio.h> 45 #endif 46 47 static void handler(int, siginfo_t *, void *); 48 49 #define VALUE (int)0xc001dad1 50 static int value; 51 52 static void 53 #ifdef __FreeBSD__ 54 handler(int signo __unused, siginfo_t *info __unused, void *data __unused) 55 #else 56 handler(int signo, siginfo_t *info, void *data) 57 #endif 58 { 59 value = info->si_value.sival_int; 60 kill(0, SIGINFO); 61 } 62 63 ATF_TC(sigqueue_basic); 64 ATF_TC_HEAD(sigqueue_basic, tc) 65 { 66 atf_tc_set_md_var(tc, "descr", "Checks sigqueue(3) sigval delivery"); 67 } 68 69 ATF_TC_BODY(sigqueue_basic, tc) 70 { 71 struct sigaction sa; 72 union sigval sv; 73 74 sa.sa_sigaction = handler; 75 sigemptyset(&sa.sa_mask); 76 sa.sa_flags = SA_SIGINFO; 77 78 if (sigaction(SIGUSR1, &sa, NULL) != 0) 79 atf_tc_fail("sigaction failed"); 80 81 sv.sival_int = VALUE; 82 83 #ifdef __FreeBSD__ 84 /* 85 * From kern_sig.c: 86 * Specification says sigqueue can only send signal to single process. 87 */ 88 if (sigqueue(getpid(), SIGUSR1, sv) != 0) 89 #else 90 if (sigqueue(0, SIGUSR1, sv) != 0) 91 #endif 92 atf_tc_fail("sigqueue failed"); 93 94 sched_yield(); 95 ATF_REQUIRE_EQ(sv.sival_int, value); 96 } 97 98 ATF_TC(sigqueue_err); 99 ATF_TC_HEAD(sigqueue_err, tc) 100 { 101 atf_tc_set_md_var(tc, "descr", "Test errors from sigqueue(3)"); 102 } 103 104 ATF_TC_BODY(sigqueue_err, tc) 105 { 106 static union sigval sv; 107 108 errno = 0; 109 ATF_REQUIRE_ERRNO(EINVAL, sigqueue(getpid(), -1, sv) == -1); 110 } 111 112 static int signals[] = { 113 SIGINT, SIGRTMIN + 1, SIGINT, SIGRTMIN + 0, SIGRTMIN + 2, 114 SIGQUIT, SIGRTMIN + 1 115 }; 116 #ifdef __arraycount 117 #define CNT __arraycount(signals) 118 #else 119 #define CNT (sizeof(signals) / sizeof(signals[0])) 120 #endif 121 122 static sig_atomic_t count = 0; 123 static int delivered[CNT]; 124 125 static void 126 myhandler(int signo, siginfo_t *info, void *context) 127 { 128 delivered[count++] = signo; 129 #ifdef __FreeBSD__ 130 printf("Signal #%zu: signo: %d\n", (size_t)count, signo); 131 #endif 132 } 133 134 static int 135 asc(const void *a, const void *b) 136 { 137 const int *ia = a, *ib = b; 138 return *ib - *ia; 139 } 140 141 /* 142 * given a array of signals to be delivered in tosend of size len 143 * place in ordered the signals to be delivered in delivery order 144 * and return the number of signals that should be delivered 145 */ 146 static size_t 147 sigorder(int *ordered, const int *tosend, size_t len) 148 { 149 memcpy(ordered, tosend, len * sizeof(*tosend)); 150 qsort(ordered, len, sizeof(*ordered), asc); 151 if (len == 1) 152 return len; 153 154 size_t i, j; 155 for (i = 0, j = 0; i < len - 1; i++) { 156 if (ordered[i] >= SIGRTMIN) 157 continue; 158 if (j == 0) 159 j = i + 1; 160 while (ordered[i] == ordered[j] && j < len) 161 j++; 162 if (j == len) 163 break; 164 ordered[i + 1] = ordered[j]; 165 } 166 return i + 1; 167 } 168 169 ATF_TC(sigqueue_rt); 170 ATF_TC_HEAD(sigqueue_rt, tc) 171 { 172 atf_tc_set_md_var(tc, "descr", "Test queuing of real-time signals"); 173 } 174 175 ATF_TC_BODY(sigqueue_rt, tc) 176 { 177 pid_t pid; 178 union sigval val; 179 struct sigaction act; 180 int ordered[CNT]; 181 struct sigaction oact[CNT]; 182 size_t ndelivered; 183 184 ndelivered = sigorder(ordered, signals, CNT); 185 186 act.sa_flags = SA_SIGINFO; 187 act.sa_sigaction = myhandler; 188 sigemptyset(&act.sa_mask); 189 for (size_t i = 0; i < ndelivered; i++) 190 ATF_REQUIRE(sigaction(ordered[i], &act, &oact[i]) != -1); 191 192 val.sival_int = 0; 193 pid = getpid(); 194 195 sigset_t mask, orig; 196 sigemptyset(&mask); 197 for (size_t i = 0; i < CNT; i++) 198 #ifdef __FreeBSD__ 199 if (sigaddset(&mask, signals[i]) == -1) 200 warn("sigaddset"); 201 #else 202 sigaddset(&mask, signals[i]); 203 #endif 204 205 ATF_REQUIRE(sigprocmask(SIG_BLOCK, &mask, &orig) != -1); 206 207 for (size_t i = 0; i < CNT; i++) 208 ATF_REQUIRE(sigqueue(pid, signals[i], val) != -1); 209 210 ATF_REQUIRE(sigprocmask(SIG_UNBLOCK, &mask, &orig) != -1); 211 sleep(1); 212 #ifdef __FreeBSD__ 213 ATF_CHECK_MSG((size_t)count == ndelivered, 214 "count %zu != ndelivered %zu", (size_t)count, ndelivered); 215 #else 216 ATF_REQUIRE_MSG((size_t)count == ndelivered, 217 "count %zu != ndelivered %zu", (size_t)count, ndelivered); 218 #endif 219 for (size_t i = 0; i < ndelivered; i++) 220 ATF_REQUIRE_MSG(ordered[i] == delivered[i], 221 "%zu: ordered %d != delivered %d", 222 i, ordered[i], delivered[i]); 223 224 #ifdef __FreeBSD__ 225 if (count > ndelivered) 226 for (size_t i = ndelivered; i < count; i++) 227 printf("Undelivered signal #%zu: %d\n", i, ordered[i]); 228 #endif 229 230 for (size_t i = 0; i < ndelivered; i++) 231 ATF_REQUIRE(sigaction(signals[i], &oact[i], NULL) != -1); 232 } 233 234 ATF_TP_ADD_TCS(tp) 235 { 236 237 ATF_TP_ADD_TC(tp, sigqueue_basic); 238 ATF_TP_ADD_TC(tp, sigqueue_err); 239 ATF_TP_ADD_TC(tp, sigqueue_rt); 240 241 return atf_no_error(); 242 } 243