source/lib/fault.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 1.9.
   4    Critical Fault handling
   5    Copyright (C) Andrew Tridgell 1992-1997
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "includes.h"
  23 extern int DEBUGLEVEL;
  24
  25
  26 static void (*cont_fn)();
  27
  28
  29 /*******************************************************************
  30 report a fault
  31 ********************************************************************/
  32 static void fault_report(int sig)
  33 {
  34   DEBUG(0,("===============================================================\n"));
  35   DEBUG(0,("INTERNAL ERROR: Signal %d in pid %d (%s)",sig,(int)getpid(),VERSION));
  36   DEBUG(0,("\nPlease read the file BUGS.txt in the distribution\n"));
  37   DEBUG(0,("===============================================================\n"));
  38
  39 #if AJT
  40   ajt_panic();
  41 #endif
  42
  43   if (cont_fn)
  44     {
  45       fault_setup(cont_fn);
  46       cont_fn(NULL);
  47 #ifdef SIGSEGV
  48       signal(SIGSEGV,SIGNAL_CAST SIG_DFL);
  49 #endif
  50 #ifdef SIGBUS
  51       signal(SIGBUS,SIGNAL_CAST SIG_DFL);
  52 #endif
  53       return; /* this should cause a core dump */
  54     }
  55   exit(1);
  56 }
  57
  58 /****************************************************************************
  59 catch serious errors
  60 ****************************************************************************/
  61 static void sig_fault(int sig)
  62 {
  63   fault_report(sig);
  64 }
  65
  66 /*******************************************************************
  67 setup our fault handlers
  68 ********************************************************************/
  69 void fault_setup(void (*fn)())
  70 {
  71   cont_fn = fn;
  72
  73 #ifdef SIGSEGV
  74   signal(SIGSEGV,SIGNAL_CAST sig_fault);
  75 #endif
  76 #ifdef SIGBUS
  77   signal(SIGBUS,SIGNAL_CAST sig_fault);
  78 #endif
  79 }
  80
  81
  82