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