1  /* Set the disposition of SIG to SIG_IGN.
       2     Copyright (C) 1998-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <errno.h>
      20  #define __need_NULL
      21  #include <stddef.h>
      22  #include <signal.h>
      23  #include <string.h>	/* For the real memset prototype.  */
      24  #include <sigsetops.h>
      25  
      26  int
      27  sigignore (int sig)
      28  {
      29    struct sigaction act;
      30  
      31    act.sa_handler = SIG_IGN;
      32    __sigemptyset (&act.sa_mask);
      33    act.sa_flags = 0;
      34  
      35    return __sigaction (sig, &act, NULL);
      36  }