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/* Copyright (C) 1992-2020 Free Software Foundation, Inc.
Written by James Clark (jjc@jclark.com)
This file is part of groff.
groff is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation, either version 3 of the License, or
(at your option) any later version.
groff is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Unfortunately vendors seem to have problems writing a <signal.h>
that is correct for C++, so we implement all signal handling in C. */
#include <config.h>
#include <stdlib.h>
#include <sys/types.h>
#include <signal.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
/* Prototype */
void catch_fatal_signals(void);
extern void cleanup(void);
static RETSIGTYPE handle_fatal_signal(int signum)
{
signal(signum, SIG_DFL);
cleanup();
#ifdef HAVE_KILL
kill(getpid(), signum);
#else
/* MS-DOS and Win32 don't have kill(); the best compromise is
probably to use exit() instead. */
exit(signum);
#endif
}
void catch_fatal_signals(void)
{
#ifdef SIGHUP
signal(SIGHUP, handle_fatal_signal);
#endif
signal(SIGINT, handle_fatal_signal);
signal(SIGTERM, handle_fatal_signal);
}
#ifdef __cplusplus
}
#endif
#ifndef HAVE_RENAME
void ignore_fatal_signals()
{
#ifdef SIGHUP
signal(SIGHUP, SIG_IGN);
#endif
signal(SIGINT, SIG_IGN);
signal(SIGTERM, SIG_IGN);
}
#endif /* not HAVE_RENAME */
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