signal.c revision 75584 
175584Sru/* Copyright (C) 1992 Free Software Foundation, Inc.
275584Sru     Written by James Clark (jjc@jclark.com)
375584Sru
475584SruThis file is part of groff.
575584Sru
675584Srugroff is free software; you can redistribute it and/or modify it under
775584Sruthe terms of the GNU General Public License as published by the Free
875584SruSoftware Foundation; either version 2, or (at your option) any later
975584Sruversion.
1075584Sru
1175584Srugroff is distributed in the hope that it will be useful, but WITHOUT ANY
1275584SruWARRANTY; without even the implied warranty of MERCHANTABILITY or
1375584SruFITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
1475584Srufor more details.
1575584Sru
1675584SruYou should have received a copy of the GNU General Public License along
1775584Sruwith groff; see the file COPYING.  If not, write to the Free Software
1875584SruFoundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
1975584Sru
2075584Sru/* Unfortunately vendors seem to have problems writing a <signal.h>
2175584Sruthat is correct for C++, so we implement all signal handling in C. */
2275584Sru
2375584Sru#include <sys/types.h>
2475584Sru#include <signal.h>
2575584Sru#ifdef HAVE_UNISTD_H
2675584Sru#include <unistd.h>
2775584Sru#endif
2875584Sru
2975584Sru#ifndef RETSIGTYPE
3075584Sru#define RETSIGTYPE void
3175584Sru#endif
3275584Sru
3375584Sruextern void cleanup();
3475584Sru
3575584Srustatic RETSIGTYPE handle_fatal_signal(signum)
3675584Sru     int signum;
3775584Sru{
3875584Sru  signal(signum, SIG_DFL);
3975584Sru  cleanup();
4075584Sru  kill(getpid(), signum);
4175584Sru}
4275584Sru
4375584Sruvoid catch_fatal_signals()
4475584Sru{
4575584Sru#ifdef SIGHUP
4675584Sru  signal(SIGHUP, handle_fatal_signal);
4775584Sru#endif
4875584Sru  signal(SIGINT, handle_fatal_signal);
4975584Sru  signal(SIGTERM, handle_fatal_signal);
5075584Sru}
5175584Sru
5275584Sru#ifndef HAVE_RENAME
5375584Sru
5475584Sruvoid ignore_fatal_signals()
5575584Sru{
5675584Sru#ifdef SIGHUP
5775584Sru  signal(SIGHUP, SIG_IGN);
5875584Sru#endif
5975584Sru  signal(SIGINT, SIG_IGN);
6075584Sru  signal(SIGTERM, SIG_IGN);
6175584Sru}
6275584Sru
6375584Sru#endif /* not HAVE_RENAME */
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