src/utils/indxbib/signal.c

   1 /* Copyright (C) 1992, 2001, 2003 Free Software Foundation, Inc.
   2      Written by James Clark (jjc@jclark.com)
   3
   4 This file is part of groff.
   5
   6 groff is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 2, or (at your option) any later
   9 version.
  10
  11 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License along
  17 with groff; see the file COPYING.  If not, write to the Free Software
  18 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
  19
  20 /* Unfortunately vendors seem to have problems writing a <signal.h>
  21 that is correct for C++, so we implement all signal handling in C. */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <sys/types.h>
  28 #include <signal.h>
  29 #ifdef HAVE_UNISTD_H
  30 #include <unistd.h>
  31 #endif
  32
  33 #ifndef RETSIGTYPE
  34 #define RETSIGTYPE void
  35 #endif
  36
  37 extern void cleanup();
  38
  39 static RETSIGTYPE handle_fatal_signal(signum)
  40      int signum;
  41 {
  42   signal(signum, SIG_DFL);
  43   cleanup();
  44 #ifdef HAVE_KILL
  45   kill(getpid(), signum);
  46 #else
  47   /* MS-DOS and Win32 don't have kill(); the best compromise is
  48      probably to use exit() instead. */
  49   exit(signum);
  50 #endif
  51 }
  52
  53 void catch_fatal_signals()
  54 {
  55 #ifdef SIGHUP
  56   signal(SIGHUP, handle_fatal_signal);
  57 #endif
  58   signal(SIGINT, handle_fatal_signal);
  59   signal(SIGTERM, handle_fatal_signal);
  60 }
  61
  62 #ifndef HAVE_RENAME
  63
  64 void ignore_fatal_signals()
  65 {
  66 #ifdef SIGHUP
  67   signal(SIGHUP, SIG_IGN);
  68 #endif
  69   signal(SIGINT, SIG_IGN);
  70   signal(SIGTERM, SIG_IGN);
  71 }
  72
  73 #endif /* not HAVE_RENAME */