signal/sigaddset.c

   1 /* Copyright (C) 1991-2021 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library 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 GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <signal.h>
  20 #include <sigsetops.h>
  21 #include <internal-signals.h>
  22
  23 /* Add SIGNO to SET.  */
  24 int
  25 sigaddset (sigset_t *set, int signo)
  26 {
  27   if (set == NULL || signo <= 0 || signo >= NSIG
  28       || __is_internal_signal (signo))
  29     {
  30       __set_errno (EINVAL);
  31       return -1;
  32     }
  33
  34   __sigaddset (set, signo);
  35   return 0;
  36 }
  37 libc_hidden_def (sigaddset)