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/* Copyright (C) 1991, 1993, 1995, 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
/* Function to close all streams and also make sure we don't loop by
calling abort while closing the streams. */
extern void __close_all_streams (void);
/* Cause an abnormal program termination with core-dump. */
void
abort (void)
{
struct sigaction act;
sigset_t sigs;
if (__sigemptyset (&sigs) == 0 &&
__sigaddset (&sigs, SIGABRT) == 0)
__sigprocmask (SIG_UNBLOCK, &sigs, (sigset_t *) NULL);
/* If there is a user handler installed use it. We don't close or
flush streams. */
if (__sigaction (SIGABRT, NULL, &act) >= 0
&& act.sa_handler != SIG_DFL)
{
/* Send signal to call user handler. */
raise (SIGABRT);
/* It returns, so we are responsible for closing the streams. */
__close_all_streams ();
/* There was a handler installed. Now remove it. */
memset (&act, '\0', sizeof (struct sigaction));
act.sa_handler = SIG_DFL;
__sigfillset (&act.sa_mask);
act.sa_flags = 0;
__sigaction (SIGABRT, &act, NULL);
}
else
/* No handler installed so the next `raise' will hopefully
terminate the process. Therefore we must close the streams. */
__close_all_streams ();
/* Try again. */
raise (SIGABRT);
/* If we can't signal ourselves, exit. */
_exit (127);
/* If even this fails make sure we never return. */
while (1)
/* For ever and ever. */
;
}
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