83 lines
1.7 KiB
C
83 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) International Business Machines Corp., 2001
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*
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* Description:
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* Verify the basic function of sigsuspend():
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* 1) sigsuspend() can replace process's current signal mask
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* by the specified signal mask and suspend the process
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* execution until the delivery of a signal.
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* 2) sigsuspend() should return after the execution of signal
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* handler and restore the previous signal mask.
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*/
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#include <errno.h>
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#include <unistd.h>
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#include <string.h>
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#include <signal.h>
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#include "tst_test.h"
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static sigset_t signalset, sigset1, sigset2;
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static volatile sig_atomic_t alarm_num;
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static void sig_handler(int sig)
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{
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alarm_num = sig;
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}
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static void verify_sigsuspend(void)
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{
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alarm_num = 0;
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SAFE_SIGFILLSET(&sigset2);
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alarm(1);
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/* Unblock SIGALRM */
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TEST(sigsuspend(&signalset));
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alarm(0);
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if (TST_RET != -1 || TST_ERR != EINTR) {
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tst_res(TFAIL | TTERRNO,
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"sigsuspend() returned value %ld", TST_RET);
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return;
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}
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if (alarm_num != SIGALRM) {
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tst_res(TFAIL, "sigsuspend() didn't unblock SIGALRM");
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return;
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}
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SAFE_SIGPROCMASK(0, NULL, &sigset2);
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if (memcmp(&sigset1, &sigset2, sizeof(unsigned long))) {
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tst_res(TFAIL, "sigsuspend() failed to "
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"restore the previous signal mask");
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return;
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}
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tst_res(TPASS, "sigsuspend() succeeded");
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}
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static void setup(void)
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{
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SAFE_SIGEMPTYSET(&signalset);
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SAFE_SIGEMPTYSET(&sigset1);
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SAFE_SIGADDSET(&sigset1, SIGALRM);
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struct sigaction sa_new = {
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.sa_handler = sig_handler,
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};
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SAFE_SIGACTION(SIGALRM, &sa_new, 0);
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/* Block SIGALRM */
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SAFE_SIGPROCMASK(SIG_SETMASK, &sigset1, NULL);
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}
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static struct tst_test test = {
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.setup = setup,
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.test_all = verify_sigsuspend,
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};
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