/* Copyright (C) 1997-2018 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

   <http://www.gnu.org/licenses/>.  */

#include <errno.h>

#include <signal.h>

#include <string.h>

#include <sysdep.h>

#include <sys/syscall.h>

/* New ports should not define the obsolete SA_RESTORER, however some

   architecture requires for compat mode and/or due old ABI.  */

#include <kernel_sigaction.h>

#ifndef SA_RESTORER

# define SET_SA_RESTORER(kact, act)

# define RESET_SA_RESTORER(act, kact)

#endif

/* SPARC passes the restore function as an argument to rt_sigaction.  */

#ifndef STUB

# define STUB(act)

#endif

/* 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

__libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)

{

  int result;

  struct kernel_sigaction kact, koact;

  if (act)

    {

      kact.k_sa_handler = act->sa_handler;

      memcpy (&kact.sa_mask, &act->sa_mask, sizeof (sigset_t));

      kact.sa_flags = act->sa_flags;

      SET_SA_RESTORER (&kact, act);

    }

  /* XXX The size argument hopefully will have to be changed to the

     real size of the user-level sigset_t.  */

  result = INLINE_SYSCALL_CALL (rt_sigaction, sig,

				act ? &kact : NULL,

				oact ? &koact : NULL, STUB(act) _NSIG / 8);

  if (oact && result >= 0)

    {

      oact->sa_handler = koact.k_sa_handler;

      memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (sigset_t));

      oact->sa_flags = koact.sa_flags;

      RESET_SA_RESTORER (oact, &koact);

    }

  return result;

}

libc_hidden_def (__libc_sigaction)

#include <nptl/sigaction.c>