indxbib/signal.c

   1 /* Copyright (C) 1992 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, 675 Mass Ave, Cambridge, MA 02139, 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 #include <sys/types.h>
  24 #include <signal.h>
  25 #ifdef HAVE_UNISTD_H
  26 #include <unistd.h>
  27 #endif
  28
  29 #ifndef RETSIGTYPE
  30 #define RETSIGTYPE void
  31 #endif
  32
  33 extern void cleanup();
  34
  35 static RETSIGTYPE handle_fatal_signal(signum)
  36      int signum;
  37 {
  38   signal(signum, SIG_DFL);
  39   cleanup();
  40   kill(getpid(), signum);
  41 }
  42
  43 void catch_fatal_signals()
  44 {
  45 #ifdef SIGHUP
  46   signal(SIGHUP, handle_fatal_signal);
  47 #endif
  48   signal(SIGINT, handle_fatal_signal);
  49   signal(SIGTERM, handle_fatal_signal);
  50 }
  51
  52 #ifndef HAVE_RENAME
  53
  54 void ignore_fatal_signals()
  55 {
  56 #ifdef SIGHUP
  57   signal(SIGHUP, SIG_IGN);
  58 #endif
  59   signal(SIGINT, SIG_IGN);
  60   signal(SIGTERM, SIG_IGN);
  61 }
  62
  63 #endif /* not HAVE_RENAME */