1  /* Test raising a signal.
       2     Copyright (C) 2011-2023 Free Software Foundation, Inc.
       3  
       4     This program is free software: you can redistribute it and/or modify
       5     it under the terms of the GNU General Public License as published by
       6     the Free Software Foundation, either version 3 of the License, or
       7     (at your option) any later version.
       8  
       9     This program is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      12     GNU General Public License for more details.
      13  
      14     You should have received a copy of the GNU General Public License
      15     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
      16  
      17  #include <config.h>
      18  
      19  #include <signal.h>
      20  #include <unistd.h>
      21  
      22  #include "signature.h"
      23  SIGNATURE_CHECK (raise, int, (int));
      24  
      25  #include <stdlib.h>
      26  
      27  #include "macros.h"
      28  
      29  /* It is safe to use _Noreturn here: _exit() never returns, and GCC knows that
      30     _exit() is a non-returning function, even on platforms where its declaration
      31     in <unistd.h> does not have the 'noreturn' attribute.  */
      32  static _Noreturn void
      33  handler (_GL_UNUSED int sig)
      34  {
      35    _exit (0);
      36  }
      37  
      38  int
      39  main (void)
      40  {
      41    /* Test behaviour for invalid argument.  */
      42    ASSERT (raise (-1) != 0);
      43  
      44    /* Test behaviour for SIGINT.  */
      45    ASSERT (signal (SIGINT, handler) != SIG_ERR);
      46  
      47    raise (SIGINT);
      48  
      49    /* We should not get here, because the handler takes away the control.  */
      50    exit (1);
      51  }