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/*
Unix SMB/CIFS implementation.
Critical Fault handling
Copyright (C) Andrew Tridgell 1992-1998
This program 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 2 of the License, or
(at your option) any later version.
This program 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
static void (*cont_fn)(void *);
/* the registered fault handler */
static struct {
const char *name;
void (*fault_handler)(int sig);
} fault_handlers;
/*******************************************************************
report a fault
********************************************************************/
static void fault_report(int sig)
{
static int counter;
if (counter) _exit(1);
DEBUG(0,("===============================================================\n"));
DEBUG(0,("INTERNAL ERROR: Signal %d in pid %d (%s)",sig,(int)getpid(),SAMBA_VERSION_STRING));
DEBUG(0,("\nPlease read the file BUGS.txt in the distribution\n"));
DEBUG(0,("===============================================================\n"));
smb_panic("internal error");
if (cont_fn) {
cont_fn(NULL);
#ifdef SIGSEGV
CatchSignal(SIGSEGV,SIGNAL_CAST SIG_DFL);
#endif
#ifdef SIGBUS
CatchSignal(SIGBUS,SIGNAL_CAST SIG_DFL);
#endif
return; /* this should cause a core dump */
}
exit(1);
}
/****************************************************************************
catch serious errors
****************************************************************************/
static void sig_fault(int sig)
{
if (fault_handlers.fault_handler) {
/* we have a fault handler, call it. It may not return. */
fault_handlers.fault_handler(sig);
}
/* If it returns or doean't exist, use regular reporter */
fault_report(sig);
}
/*******************************************************************
setup our fault handlers
********************************************************************/
void fault_setup(void (*fn)(void *))
{
cont_fn = fn;
#ifdef SIGSEGV
CatchSignal(SIGSEGV,SIGNAL_CAST sig_fault);
#endif
#ifdef SIGBUS
CatchSignal(SIGBUS,SIGNAL_CAST sig_fault);
#endif
}
/*
register a fault handler.
Should only be called once in the execution of smbd.
*/
BOOL register_fault_handler(const char *name, void (*fault_handler)(int sig))
{
if (fault_handlers.name != NULL) {
/* it's already registered! */
DEBUG(2,("fault handler '%s' already registered - failed '%s'\n",
fault_handlers.name, name));
return False;
}
fault_handlers.name = name;
fault_handlers.fault_handler = fault_handler;
DEBUG(2,("fault handler '%s' registered\n", name));
return True;
}
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