/* Copyright (C) 1991-2024 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#include <errno.h>
#include <internal-signals.h>
#include <libc-lock.h>
#include <signal.h>

/* If ACT is not NULL, change the action for SIG to *ACT.
   If OACT is not NULL, put the old action for SIG in *OACT.  */
int
__sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
{
  if (sig <= 0 || sig >= NSIG || is_internal_signal (sig))
    {
      __set_errno (EINVAL);
      return -1;
    }

  internal_sigset_t set;

  if (sig == SIGABRT)
    __abort_lock_wrlock (&set);

  int r = __libc_sigaction (sig, act, oact);

  if (sig == SIGABRT)
    __abort_lock_unlock (&set);

  return r;
}
libc_hidden_def (__sigaction)
weak_alias (__sigaction, sigaction)