first public release of samba4 code

(This used to be commit b0510b5428b3461aeb9bbe3cc95f62fc73e2b97f)

1 files changed, 107 insertions, 0 deletions

diff --git a/source4/lib/fault.c b/source4/lib/fault.c
new file mode 100644
index 0000000000..5a76ce2c0c
--- /dev/null
+++ b/source4/lib/fault.c
@@ -0,0 +1,107 @@
+/* 
+   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));
+	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;
+}