1/*	$NetBSD$	*/
2
3/* Copyright (C) 1992, 2001, 2003, 2004 Free Software Foundation, Inc.
4     Written by James Clark (jjc@jclark.com)
5
6This file is part of groff.
7
8groff is free software; you can redistribute it and/or modify it under
9the terms of the GNU General Public License as published by the Free
10Software Foundation; either version 2, or (at your option) any later
11version.
12
13groff is distributed in the hope that it will be useful, but WITHOUT ANY
14WARRANTY; without even the implied warranty of MERCHANTABILITY or
15FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
16for more details.
17
18You should have received a copy of the GNU General Public License along
19with groff; see the file COPYING.  If not, write to the Free Software
20Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
21
22/* Unfortunately vendors seem to have problems writing a <signal.h>
23that is correct for C++, so we implement all signal handling in C. */
24
25#include <stdlib.h>
26
27#ifdef HAVE_CONFIG_H
28#include <config.h>
29#endif
30
31#include <sys/types.h>
32#include <signal.h>
33#ifdef HAVE_UNISTD_H
34#include <unistd.h>
35#endif
36
37#ifdef __cplusplus
38extern "C" {
39#endif
40
41extern void cleanup(void);
42
43static RETSIGTYPE handle_fatal_signal(int signum)
44{
45  signal(signum, SIG_DFL);
46  cleanup();
47#ifdef HAVE_KILL
48  kill(getpid(), signum);
49#else
50  /* MS-DOS and Win32 don't have kill(); the best compromise is
51     probably to use exit() instead. */
52  exit(signum);
53#endif
54}
55
56void catch_fatal_signals(void)
57{
58#ifdef SIGHUP
59  signal(SIGHUP, handle_fatal_signal);
60#endif
61  signal(SIGINT, handle_fatal_signal);
62  signal(SIGTERM, handle_fatal_signal);
63}
64
65#ifdef __cplusplus
66}
67#endif
68
69#ifndef HAVE_RENAME
70
71void ignore_fatal_signals()
72{
73#ifdef SIGHUP
74  signal(SIGHUP, SIG_IGN);
75#endif
76  signal(SIGINT, SIG_IGN);
77  signal(SIGTERM, SIG_IGN);
78}
79
80#endif /* not HAVE_RENAME */
81