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 Trouble-Shooting section of the Samba3-HOWTO\n"));
  39         DEBUG(0,("\nFrom: http://www.samba.org/samba/docs/Samba3-HOWTO.pdf\n"));
  40         DEBUG(0,("===============================================================\n"));
  41
  42         smb_panic("internal error");
  43
  44         if (cont_fn) {
  45                 cont_fn(NULL);
  46 #ifdef SIGSEGV
  47                 CatchSignal(SIGSEGV,SIGNAL_CAST SIG_DFL);
  48 #endif
  49 #ifdef SIGBUS
  50                 CatchSignal(SIGBUS,SIGNAL_CAST SIG_DFL);
  51 #endif
  52 #ifdef SIGABRT
  53                 CatchSignal(SIGABRT,SIGNAL_CAST SIG_DFL);
  54 #endif
  55                 return; /* this should cause a core dump */
  56         }
  57         exit(1);
  58 }
  59
  60 /****************************************************************************
  61 catch serious errors
  62 ****************************************************************************/
  63 static void sig_fault(int sig)
  64 {
  65         fault_report(sig);
  66 }
  67
  68 /*******************************************************************
  69 setup our fault handlers
  70 ********************************************************************/
  71 void fault_setup(void (*fn)(void *))
  72 {
  73         cont_fn = fn;
  74
  75 #ifdef SIGSEGV
  76         CatchSignal(SIGSEGV,SIGNAL_CAST sig_fault);
  77 #endif
  78 #ifdef SIGBUS
  79         CatchSignal(SIGBUS,SIGNAL_CAST sig_fault);
  80 #endif
  81 #ifdef SIGABRT
  82         CatchSignal(SIGABRT,SIGNAL_CAST sig_fault);
  83 #endif
  84 }