text: /* sigaction.c
   *
   * Copyright (C) 1995 DJ Delorie
   *
   * (See the README file in this directory for the copyright and license
   * history of this file.)
   *
   * This file is free software: you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation, either version 3 of the License, or
   * (at your option) any later version.
   *
   * This file 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 General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this file.  If not, see <http://www.gnu.org/licenses/>.
   */
  #include <signal.h>
  #include <errno.h>
  
  int
  sigaction(int _sig, const struct sigaction *_act, struct sigaction *_oact)
  {
    int retval = 0;
  
    if (_oact)
    {
      void (*installed_sig)(int) = signal (_sig, SIG_IGN);
  
      /* FIXME */
      if (installed_sig == SIG_ERR)
      {
        retval = -1;
        errno = EINVAL;
      }
      else
        signal (_sig, installed_sig);
      _oact->sa_handler = installed_sig;
      retval = sigemptyset (&_oact->sa_mask);
      _oact->sa_flags = 0;
    }
    if (_act)
    {
      if (signal (_sig, _act->sa_handler) == SIG_ERR)
      {
        retval = -1;
        errno = EINVAL;
      }
    }
    return 0;
  }
  
  
  
  