1 /* $NetBSD: t_sigqueue.c,v 1.7 2017/01/13 20:44:10 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 1.7 2017/01/13 20:44:10 christos Exp $"); 34 35 #include <atf-c.h> 36 #include <err.h> 37 #include <errno.h> 38 #include <signal.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <sched.h> 42 #include <unistd.h> 43 44 static void handler(int, siginfo_t *, void *); 45 46 #define VALUE (int)0xc001dad1 47 static int value; 48 49 static void 50 handler(int signo __unused, siginfo_t *info, void *data __unused) 51 { 52 value = info->si_value.sival_int; 53 kill(0, SIGINFO); 54 } 55 56 ATF_TC(sigqueue_basic); 57 ATF_TC_HEAD(sigqueue_basic, tc) 58 { 59 atf_tc_set_md_var(tc, "descr", "Checks sigqueue(3) sigval delivery"); 60 } 61 62 ATF_TC_BODY(sigqueue_basic, tc) 63 { 64 struct sigaction sa; 65 union sigval sv; 66 67 sa.sa_sigaction = handler; 68 sigemptyset(&sa.sa_mask); 69 sa.sa_flags = SA_SIGINFO; 70 71 if (sigaction(SIGUSR1, &sa, NULL) != 0) 72 atf_tc_fail("sigaction failed"); 73 74 sv.sival_int = VALUE; 75 76 if (sigqueue(0, SIGUSR1, sv) != 0) 77 atf_tc_fail("sigqueue failed"); 78 79 sched_yield(); 80 ATF_REQUIRE_EQ(sv.sival_int, value); 81 } 82 83 ATF_TC(sigqueue_err); 84 ATF_TC_HEAD(sigqueue_err, tc) 85 { 86 atf_tc_set_md_var(tc, "descr", "Test errors from sigqueue(3)"); 87 } 88 89 ATF_TC_BODY(sigqueue_err, tc) 90 { 91 static union sigval sv; 92 93 errno = 0; 94 ATF_REQUIRE_ERRNO(EINVAL, sigqueue(getpid(), -1, sv) == -1); 95 } 96 97 static int signals[] = { 98 SIGINT, SIGRTMIN + 1, SIGINT, SIGRTMIN + 0, SIGRTMIN + 2, 99 SIGQUIT, SIGRTMIN + 1 100 }; 101 #ifdef __arraycount 102 #define CNT __arraycount(signals) 103 #else 104 #define CNT (sizeof(signals) / sizeof(signals[0])) 105 #endif 106 107 static sig_atomic_t count = 0; 108 static int delivered[CNT]; 109 110 static void 111 myhandler(int signo, siginfo_t *info, void *context __unused) 112 { 113 delivered[count++] = signo; 114 printf("Signal #%zu: signo: %d\n", (size_t)count, signo); 115 } 116 117 static int 118 asc(const void *a, const void *b) 119 { 120 const int *ia = a, *ib = b; 121 return *ib - *ia; 122 } 123 124 /* 125 * given a array of signals to be delivered in tosend of size len 126 * place in ordered the signals to be delivered in delivery order 127 * and return the number of signals that should be delivered 128 */ 129 static size_t 130 sigorder(int *ordered, const int *tosend, size_t len) 131 { 132 memcpy(ordered, tosend, len * sizeof(*tosend)); 133 qsort(ordered, len, sizeof(*ordered), asc); 134 if (len == 1) 135 return len; 136 137 size_t i, j; 138 for (i = 0, j = 0; i < len - 1; i++) { 139 if (ordered[i] >= SIGRTMIN) 140 continue; 141 if (j == 0) 142 j = i + 1; 143 while (ordered[i] == ordered[j] && j < len) 144 j++; 145 if (j == len) 146 break; 147 ordered[i + 1] = ordered[j]; 148 } 149 return i + 1; 150 } 151 152 ATF_TC(sigqueue_rt); 153 ATF_TC_HEAD(sigqueue_rt, tc) 154 { 155 atf_tc_set_md_var(tc, "descr", "Test queuing of real-time signals"); 156 } 157 158 ATF_TC_BODY(sigqueue_rt, tc) 159 { 160 pid_t pid; 161 union sigval val; 162 struct sigaction act; 163 int ordered[CNT]; 164 struct sigaction oact[CNT]; 165 size_t ndelivered; 166 167 ndelivered = sigorder(ordered, signals, CNT); 168 169 act.sa_flags = SA_SIGINFO; 170 act.sa_sigaction = myhandler; 171 sigemptyset(&act.sa_mask); 172 for (size_t i = 0; i < ndelivered; i++) 173 ATF_REQUIRE(sigaction(ordered[i], &act, &oact[i]) != -1); 174 175 val.sival_int = 0; 176 pid = getpid(); 177 178 sigset_t mask, orig; 179 sigemptyset(&mask); 180 for (size_t i = 0; i < CNT; i++) 181 if (sigaddset(&mask, signals[i]) == -1) 182 warn("sigaddset"); 183 184 ATF_REQUIRE(sigprocmask(SIG_BLOCK, &mask, &orig) != -1); 185 186 for (size_t i = 0; i < CNT; i++) 187 ATF_REQUIRE(sigqueue(pid, signals[i], val) != -1); 188 189 ATF_REQUIRE(sigprocmask(SIG_UNBLOCK, &mask, &orig) != -1); 190 sleep(1); 191 ATF_CHECK_MSG((size_t)count == ndelivered, 192 "count %zu != ndelivered %zu", (size_t)count, ndelivered); 193 for (size_t i = 0; i < ndelivered; i++) 194 ATF_REQUIRE_MSG(ordered[i] == delivered[i], 195 "%zu: ordered %d != delivered %d", 196 i, ordered[i], delivered[i]); 197 198 if ((size_t)count > ndelivered) 199 for (size_t i = ndelivered; i < (size_t)count; i++) 200 printf("Undelivered signal #%zu: %d\n", i, ordered[i]); 201 202 for (size_t i = 0; i < ndelivered; i++) 203 ATF_REQUIRE(sigaction(signals[i], &oact[i], NULL) != -1); 204 } 205 206 ATF_TP_ADD_TCS(tp) 207 { 208 209 ATF_TP_ADD_TC(tp, sigqueue_basic); 210 ATF_TP_ADD_TC(tp, sigqueue_err); 211 ATF_TP_ADD_TC(tp, sigqueue_rt); 212 213 return atf_no_error(); 214 } 215