/* $NetBSD: t_sigtimedwait.c,v 1.2.52.1 2026/02/02 19:41:51 martin Exp $ */ /*- * Copyright (c) 2011 The NetBSD Foundation, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include __RCSID("$NetBSD: t_sigtimedwait.c,v 1.2.52.1 2026/02/02 19:41:51 martin Exp $"); #include #include #include #include #include #include #include #include "h_macros.h" static void on_alarm(int signo) { const char msg[] = "SIGALRM delivered\n"; (void)write(STDERR_FILENO, msg, strlen(msg)); } ATF_TC(sigtimedwait_all0timeout); ATF_TC_HEAD(sigtimedwait_all0timeout, tc) { atf_tc_set_md_var(tc, "timeout", "10"); atf_tc_set_md_var(tc, "descr", "Test for PR kern/47625: sigtimedwait" " with a timeout value of all zero should return imediately"); } ATF_TC_BODY(sigtimedwait_all0timeout, tc) { sigset_t block; struct timespec ts, before, after, len; siginfo_t info; int signo, error; RL(sigemptyset(&block)); ts.tv_sec = 0; ts.tv_nsec = 0; RL(clock_gettime(CLOCK_MONOTONIC, &before)); signo = sigtimedwait(&block, &info, &ts); error = errno; RL(clock_gettime(CLOCK_MONOTONIC, &after)); ATF_REQUIRE_MSG(signo == -1, "signo=%d, expected -1/EAGAIN=%d", signo, EAGAIN); errno = error; ATF_REQUIRE_MSG(errno == EAGAIN, "errno=%d (%s), expected EAGAIN=%d", error, strerror(error), EAGAIN); timespecsub(&after, &before, &len); ATF_REQUIRE(len.tv_sec < 1); } ATF_TC(sigtimedwait_NULL_timeout); ATF_TC_HEAD(sigtimedwait_NULL_timeout, tc) { atf_tc_set_md_var(tc, "timeout", "10"); atf_tc_set_md_var(tc, "descr", "Test sigtimedwait() without timeout"); } ATF_TC_BODY(sigtimedwait_NULL_timeout, tc) { sigset_t sig; siginfo_t info; struct itimerval it; int signo; /* arrange for a SIGALRM signal in a few seconds */ memset(&it, 0, sizeof it); it.it_value.tv_sec = 5; RL(setitimer(ITIMER_REAL, &it, NULL)); /* wait without timeout */ RL(sigemptyset(&sig)); RL(sigaddset(&sig, SIGALRM)); RL(signo = sigtimedwait(&sig, &info, NULL)); ATF_REQUIRE_MSG(signo == SIGALRM, "signo=%d, expected SIGALRM=%d", signo, SIGALRM); } ATF_TC(sigtimedwait_small_timeout); ATF_TC_HEAD(sigtimedwait_small_timeout, tc) { atf_tc_set_md_var(tc, "timeout", "15"); atf_tc_set_md_var(tc, "descr", "Test sigtimedwait with a small " "timeout"); } ATF_TC_BODY(sigtimedwait_small_timeout, tc) { sigset_t block; struct timespec ts; siginfo_t info; int signo, error; RL(sigemptyset(&block)); ts.tv_sec = 5; ts.tv_nsec = 0; signo = sigtimedwait(&block, &info, &ts); ATF_REQUIRE_MSG(signo == -1, "signo=%d, expected -1/EAGAIN=%d", signo, EAGAIN); error = errno; ATF_REQUIRE_MSG(errno == EAGAIN, "errno=%d (%s), expected EAGAIN=%d", error, strerror(error), EAGAIN); } ATF_TC(sigtimedwait_small_timeout_alarm); ATF_TC_HEAD(sigtimedwait_small_timeout_alarm, tc) { atf_tc_set_md_var(tc, "timeout", "15"); atf_tc_set_md_var(tc, "descr", "Test sigtimedwait with a small " "timeout"); } ATF_TC_BODY(sigtimedwait_small_timeout_alarm, tc) { sigset_t block; struct sigaction sa = {.sa_handler = &on_alarm}; /* no SA_RESTART */ struct timespec ts; siginfo_t info; int signo; RL(sigaction(SIGALRM, &sa, NULL)); RL(sigemptyset(&block)); ts.tv_sec = 5; ts.tv_nsec = 0; RL(sigaddset(&block, SIGALRM)); RL(sigprocmask(SIG_BLOCK, &block, NULL)); REQUIRE_LIBC(alarm(1), (unsigned)-1); RL(signo = sigtimedwait(&block, &info, &ts)); ATF_REQUIRE_MSG(signo == SIGALRM, "signo=%d, expected SIGALRM=%d", signo, SIGALRM); } ATF_TC(sigtimedwait_small_timeout_other_sig); ATF_TC_HEAD(sigtimedwait_small_timeout_other_sig, tc) { atf_tc_set_md_var(tc, "timeout", "15"); atf_tc_set_md_var(tc, "descr", "Test sigtimedwait interruption " "by a signal it's not waiting for"); } ATF_TC_BODY(sigtimedwait_small_timeout_other_sig, tc) { sigset_t sig; struct sigaction sa = {.sa_handler = &on_alarm}; /* no SA_RESTART */ struct timespec ts; siginfo_t info; int signo, error; RL(sigaction(SIGALRM, &sa, NULL)); RL(sigemptyset(&sig)); ts.tv_sec = 5; ts.tv_nsec = 0; RL(sigaddset(&sig, SIGUSR1)); RL(sigprocmask(SIG_BLOCK, &sig, NULL)); REQUIRE_LIBC(alarm(1), (unsigned)-1); /* * This returns 0 sometimes, when it should return -1/EINTR * because some signal unblocked was delivered. */ signo = sigtimedwait(&sig, &info, &ts); ATF_REQUIRE_MSG(signo == -1, "signo=%d, expected -1/EINTR=%d", signo, EINTR); error = errno; ATF_REQUIRE_MSG(errno == EINTR, "errno=%d (%s), expected EINTR=%d", error, strerror(error), EINTR); } ATF_TC(sigwaitinfo_other_sig); ATF_TC_HEAD(sigwaitinfo_other_sig, tc) { atf_tc_set_md_var(tc, "timeout", "15"); atf_tc_set_md_var(tc, "descr", "Test sigwaitinfo interruption " "by a signal it's not waiting for"); } ATF_TC_BODY(sigwaitinfo_other_sig, tc) { sigset_t sig; struct sigaction sa = {.sa_handler = &on_alarm}; /* no SA_RESTART */ siginfo_t info; int signo, error; RL(sigaction(SIGALRM, &sa, NULL)); RL(sigemptyset(&sig)); RL(sigaddset(&sig, SIGUSR1)); RL(sigprocmask(SIG_BLOCK, &sig, NULL)); REQUIRE_LIBC(alarm(1), (unsigned)-1); signo = sigwaitinfo(&sig, &info); ATF_REQUIRE_MSG(signo == -1, "signo=%d, expected -1/EINTR=%d", signo, EINTR); error = errno; ATF_REQUIRE_MSG(errno == EINTR, "errno=%d (%s), expected EINTR=%d", error, strerror(error), EINTR); } ATF_TP_ADD_TCS(tp) { ATF_TP_ADD_TC(tp, sigtimedwait_all0timeout); ATF_TP_ADD_TC(tp, sigtimedwait_NULL_timeout); ATF_TP_ADD_TC(tp, sigtimedwait_small_timeout); ATF_TP_ADD_TC(tp, sigtimedwait_small_timeout_alarm); ATF_TP_ADD_TC(tp, sigtimedwait_small_timeout_other_sig); ATF_TP_ADD_TC(tp, sigwaitinfo_other_sig); return atf_no_error(); }