1  /*
       2   * Execute a command with the specified signal blocked/unblocked.
       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 < 4)
      19  		error_msg_and_fail("usage: set_sigblock 0|1 signum path...");
      20  
      21  	const int block = atoi(av[1]);
      22  	const int signum = atoi(av[2]);
      23  	sigset_t mask;
      24  
      25  	sigemptyset(&mask);
      26  	if (sigaddset(&mask, signum))
      27  		perror_msg_and_fail("sigaddset: %s", av[2]);
      28  	if (sigprocmask(block ? SIG_BLOCK : SIG_UNBLOCK, &mask, NULL))
      29  		perror_msg_and_fail("sigprocmask");
      30  
      31  	execvp(av[3], av + 3);
      32  	perror_msg_and_fail("execvp: %s", av[3]);
      33  }