1  /*
       2   * Unblock, reset, and raise a signal.
       3   *
       4   * Copyright (c) 2017-2021 Dmitry V. Levin <ldv@strace.io>
       5   * All rights reserved.
       6   *
       7   * SPDX-License-Identifier: GPL-2.0-or-later
       8   */
       9  
      10  #include "tests.h"
      11  #include <signal.h>
      12  #include <stdlib.h>
      13  #include <unistd.h>
      14  
      15  int
      16  main(int ac, char **av)
      17  {
      18  	if (ac != 2)
      19  		error_msg_and_fail("usage: unblock_raise signo");
      20  
      21  	sigset_t mask;
      22  	sigemptyset(&mask);
      23  	const int signo = atoi(av[1]);
      24  	if (sigaddset(&mask, signo))
      25  		perror_msg_and_fail("sigaddset: %s", av[1]);
      26  	if (sigprocmask(SIG_UNBLOCK, &mask, NULL))
      27  		perror_msg_and_fail("sigprocmask");
      28  	if (signal(signo, SIG_DFL) == SIG_ERR)
      29  		perror_msg_and_fail("signal: %s", av[1]);
      30  	if (raise(signo))
      31  		perror_msg_and_fail("raise: %s", av[1]);
      32  
      33  	return 0;
      34  }