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