1/* sigaction.c
2 *
3 * Copyright (C) 1995 DJ Delorie
4 *
5 * (See the README file in this directory for the copyright and license
6 * history of this file.)
7 *
8 * This file is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2, or (at your option)
11 * any later version.
12 *
13 * This file is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this file; see the file COPYING.  If not, write to
20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
22 */
23#include <signal.h>
24#include <errno.h>
25
26int
27sigaction(int _sig, const struct sigaction *_act, struct sigaction *_oact)
28{
29  int retval = 0;
30
31  if (_oact)
32  {
33    void (*installed_sig)(int) = signal (_sig, SIG_IGN);
34
35    /* FIXME */
36    if (installed_sig == SIG_ERR)
37    {
38      retval = -1;
39      errno = EINVAL;
40    }
41    else
42      signal (_sig, installed_sig);
43    _oact->sa_handler = installed_sig;
44    retval = sigemptyset (&_oact->sa_mask);
45    _oact->sa_flags = 0;
46  }
47  if (_act)
48  {
49    if (signal (_sig, _act->sa_handler) == SIG_ERR)
50    {
51      retval = -1;
52      errno = EINVAL;
53    }
54  }
55  return 0;
56}
57
58
59
60/* arch-tag: 39526405-3d3a-44fe-af28-82a515e0c8e8
61   (do not change this comment) */
62