1 /* $NetBSD: signal.c,v 1.1.1.1 2016/01/13 18:41:49 christos Exp $ */
2
3 /* Copyright (C) 1992, 2001, 2003, 2004 Free Software Foundation, Inc.
4 Written by James Clark (jjc@jclark.com)
5
6 This file is part of groff.
7
8 groff is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
11 version.
12
13 groff is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 for more details.
17
18 You should have received a copy of the GNU General Public License along
19 with groff; see the file COPYING. If not, write to the Free Software
20 Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
21
22 /* Unfortunately vendors seem to have problems writing a <signal.h>
23 that 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
38 extern "C" {
39 #endif
40
41 extern void cleanup(void);
42
handle_fatal_signal(int signum)43 static 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
catch_fatal_signals(void)56 void 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
ignore_fatal_signals()71 void 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