source/lib/fault.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Critical Fault handling
   4    Copyright (C) Andrew Tridgell 1992-1998
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 #include "includes.h"
  22
  23 static void (*cont_fn)(void *);
  24
  25 /*******************************************************************
  26 report a fault
  27 ********************************************************************/
  28 static void fault_report(int sig)
  29 {
  30         static int counter;
  31
  32         if (counter) _exit(1);
  33
  34         counter++;
  35
  36         DEBUG(0,("===============================================================\n"));
  37         DEBUG(0,("INTERNAL ERROR: Signal %d in pid %d (%s)",sig,(int)sys_getpid(),SAMBA_VERSION_STRING));
  38         DEBUG(0,("\nPlease read the appendix Bugs of the Samba HOWTO collection\n"));
  39         DEBUG(0,("===============================================================\n"));
  40
  41         smb_panic("internal error");
  42
  43         if (cont_fn) {
  44                 cont_fn(NULL);
  45 #ifdef SIGSEGV
  46                 CatchSignal(SIGSEGV,SIGNAL_CAST SIG_DFL);
  47 #endif
  48 #ifdef SIGBUS
  49                 CatchSignal(SIGBUS,SIGNAL_CAST SIG_DFL);
  50 #endif
  51 #ifdef SIGABRT
  52                 CatchSignal(SIGABRT,SIGNAL_CAST SIG_DFL);
  53 #endif
  54                 return; /* this should cause a core dump */
  55         }
  56         exit(1);
  57 }
  58
  59 /****************************************************************************
  60 catch serious errors
  61 ****************************************************************************/
  62 static void sig_fault(int sig)
  63 {
  64         fault_report(sig);
  65 }
  66
  67 /*******************************************************************
  68 setup our fault handlers
  69 ********************************************************************/
  70 void fault_setup(void (*fn)(void *))
  71 {
  72         cont_fn = fn;
  73
  74 #ifdef SIGSEGV
  75         CatchSignal(SIGSEGV,SIGNAL_CAST sig_fault);
  76 #endif
  77 #ifdef SIGBUS
  78         CatchSignal(SIGBUS,SIGNAL_CAST sig_fault);
  79 #endif
  80 #ifdef SIGABRT
  81         CatchSignal(SIGABRT,SIGNAL_CAST sig_fault);
  82 #endif
  83 }