1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
/*
Unix SMB/CIFS implementation.
Critical Fault handling
Copyright (C) Andrew Tridgell 1992-1998
Copyright (C) Tim Prouty 2009
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "system/filesys.h"
#include "version.h"
#ifdef HAVE_SYS_SYSCTL_H
#include <sys/sysctl.h>
#endif
#ifdef HAVE_SYS_PRCTL_H
#include <sys/prctl.h>
#endif
static struct {
bool disabled;
smb_panic_handler_t panic_handler;
} fault_state;
/*******************************************************************
setup variables used for fault handling
********************************************************************/
void fault_configure(smb_panic_handler_t panic_handler)
{
fault_state.panic_handler = panic_handler;
}
/**
disable setting up fault handlers
This is used for the bind9 dlz module, as we
don't want a Samba module in bind9 to override the bind
fault handling
**/
_PUBLIC_ void fault_setup_disable(void)
{
fault_state.disabled = true;
}
/*******************************************************************
report a fault
********************************************************************/
static void fault_report(int sig)
{
static int counter;
if (counter) _exit(1);
counter++;
DEBUGSEP(0);
DEBUG(0,("INTERNAL ERROR: Signal %d in pid %d (%s)",sig,(int)getpid(),SAMBA_VERSION_STRING));
DEBUG(0,("\nPlease read the Trouble-Shooting section of the Samba HOWTO\n"));
DEBUGSEP(0);
smb_panic("internal error");
/* smb_panic() never returns, so this is really redundent */
exit(1);
}
/****************************************************************************
catch serious errors
****************************************************************************/
static void sig_fault(int sig)
{
fault_report(sig);
}
/*******************************************************************
setup our fault handlers
********************************************************************/
void fault_setup(void)
{
if (fault_state.disabled) {
return;
}
#if !defined(HAVE_DISABLE_FAULT_HANDLING)
#ifdef SIGSEGV
CatchSignal(SIGSEGV, sig_fault);
#endif
#ifdef SIGBUS
CatchSignal(SIGBUS, sig_fault);
#endif
#ifdef SIGABRT
CatchSignal(SIGABRT, sig_fault);
#endif
#endif
}
_PUBLIC_ const char *panic_action = NULL;
/*
default smb_panic() implementation
*/
static void smb_panic_default(const char *why)
{
int result;
#if defined(HAVE_PRCTL) && defined(PR_SET_PTRACER)
/*
* Make sure all children can attach a debugger.
*/
prctl(PR_SET_PTRACER, getpid(), 0, 0, 0);
#endif
if (panic_action && *panic_action) {
char pidstr[20];
char cmdstring[200];
strlcpy(cmdstring, panic_action, sizeof(cmdstring));
snprintf(pidstr, sizeof(pidstr), "%d", (int) getpid());
all_string_sub(cmdstring, "%d", pidstr, sizeof(cmdstring));
DEBUG(0, ("smb_panic(): calling panic action [%s]\n", cmdstring));
result = system(cmdstring);
if (result == -1)
DEBUG(0, ("smb_panic(): fork failed in panic action: %s\n",
strerror(errno)));
else
DEBUG(0, ("smb_panic(): action returned status %d\n",
WEXITSTATUS(result)));
}
DEBUG(0,("PANIC: %s\n", why));
#ifdef SIGABRT
CatchSignal(SIGABRT, SIG_DFL);
#endif
abort();
}
/**
Something really nasty happened - panic !
**/
_PUBLIC_ void smb_panic(const char *why)
{
if (fault_state.panic_handler) {
fault_state.panic_handler(why);
_exit(1);
}
smb_panic_default(why);
}
|
