strace/tests/rt_sigaction.c

/*
 * Copyright (c) 2014-2015 Dmitry V. Levin <ldv@altlinux.org>
 * Copyright (c) 2015-2018 The strace developers.
 * All rights reserved.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#include <assert.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>

static void handle_signal(int no)
{
	_exit(128 + no);
}

int
main(void)
{
	struct sigaction sa, sa0;

	sa.sa_handler = SIG_IGN;
	sigemptyset(&sa.sa_mask);
	sigaddset(&sa.sa_mask, SIGHUP);
	sigaddset(&sa.sa_mask, SIGINT);
	sa.sa_flags = SA_RESTART;
	assert(!sigaction(SIGUSR2, &sa, &sa0));

	sa.sa_handler = handle_signal;
	sigemptyset(&sa.sa_mask);
	sigaddset(&sa.sa_mask, SIGQUIT);
	sigaddset(&sa.sa_mask, SIGTERM);
	sa.sa_flags = SA_SIGINFO;
	assert(!sigaction(SIGUSR2, &sa, &sa0));

	sa.sa_handler = SIG_DFL;
	sigemptyset(&sa.sa_mask);
	sa.sa_flags = 0;
	assert(!sigaction(SIGUSR2, &sa, &sa0));

	sigfillset(&sa.sa_mask);
	sigdelset(&sa.sa_mask, SIGHUP);
	assert(!sigaction(SIGUSR2, &sa, &sa0));

	return 0;
}