gnu/dist/groff/src/utils/indxbib/signal.c

   1 /*      $NetBSD$        */
   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
  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
  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
  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 */