1  /*
       2   * List signal numbers that are valid arguments for sigaction syscall.
       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  
      12  #include <signal.h>
      13  #include <stdio.h>
      14  
      15  int
      16  main(void)
      17  {
      18  	for (unsigned int i = 1; i < 32; ++i) {
      19  		static const struct sigaction ign = { .sa_handler = SIG_IGN };
      20  		static const struct sigaction dfl = { .sa_handler = SIG_DFL };
      21  		struct sigaction act;
      22  
      23  		if (sigaction(i, &ign, NULL) ||
      24  		    sigaction(i, NULL, &act) ||
      25  		    ign.sa_handler != act.sa_handler ||
      26  		    sigaction(i, &dfl, NULL) ||
      27  		    sigaction(i, NULL, &act) ||
      28  		    dfl.sa_handler != act.sa_handler)
      29  			continue;
      30  
      31  		printf("%u\n", i);
      32  	}
      33  
      34  	return 0;
      35  }