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/* Copyright (C) 1997, 1998, 1999, 2000 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, write to the Free

   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA

   02111-1307 USA.  */

/* Modified 05/30/02 by Jeff Johnston, Red Hat Inc. */

#include <errno.h>

#include <signal.h>

#include <string.h>

#include <machine/syscall.h>

/* The difference here is that the sigaction structure used in the

   kernel is not the same as we use in the libc.  Therefore we must

   translate it here.  */

#include <kernel_sigaction.h>

#define __NR___rt_sigaction __NR_rt_sigaction

static _syscall4(int,__rt_sigaction,int,sig,

                 const struct kernel_sigaction *,act,

                 struct kernel_sigaction *,oact,size_t,size);

/* 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 (sig, act, oact)

     int sig;

     const struct sigaction *act;

     struct sigaction *oact;

{

  int result;

  struct kernel_sigaction kact, koact;

  /* Save the current error value for later.  We need not do this

     if we are guaranteed to have realtime signals.  */

  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;

      kact.sa_restorer = act->sa_restorer;

    }

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

     real size of the user-level sigset_t.  */

  result = __rt_sigaction (sig,

               act ? (&kact) : NULL,

               oact ? (&koact) : NULL, 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;

      oact->sa_restorer = koact.sa_restorer;

    }

  return result;

}

weak_alias (__libc_sigaction, __sigaction)

weak_alias (__libc_sigaction, sigaction)