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
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/*-
* Copyright (c) 2004 Apple Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* $P4: //depot/projects/trustedbsd/openbsm/libbsm/bsm_notify.c#15 $
*/
/*
* Based on sample code from Marc Majka.
*/
#include <sys/types.h>
#include <config/config.h>
#ifdef HAVE_FULL_QUEUE_H
#include <sys/queue.h>
#else /* !HAVE_FULL_QUEUE_H */
#include <compat/queue.h>
#endif /* !HAVE_FULL_QUEUE_H */
#include <bsm/audit_internal.h>
#include <bsm/libbsm.h>
#include <errno.h>
#include <inttypes.h>
#include <stdarg.h>
#include <string.h>
#include <syslog.h>
#ifdef __APPLE__
#include <notify.h>
/* If 1, assumes a kernel that sends the right notification. */
#define AUDIT_NOTIFICATION_ENABLED 1
#if AUDIT_NOTIFICATION_ENABLED
static int token = 0;
#endif /* AUDIT_NOTIFICATION_ENABLED */
static long au_cond = AUC_UNSET; /* <bsm/audit.h> */
uint32_t
au_notify_initialize(void)
{
#if AUDIT_NOTIFICATION_ENABLED
uint32_t status;
int ignore_first;
status = notify_register_check(__BSM_INTERNAL_NOTIFY_KEY, &token);
if (status != NOTIFY_STATUS_OK)
return (status);
status = notify_check(token, &ignore_first);
if (status != NOTIFY_STATUS_OK)
return (status);
#endif
if (auditon(A_GETCOND, &au_cond, sizeof(long)) < 0) {
syslog(LOG_ERR, "Initial audit status check failed (%s)",
strerror(errno));
if (errno == ENOSYS) /* auditon() unimplemented. */
return (AU_UNIMPL);
return (NOTIFY_STATUS_FAILED); /* Is there a better code? */
}
return (NOTIFY_STATUS_OK);
}
int
au_notify_terminate(void)
{
#if AUDIT_NOTIFICATION_ENABLED
return ((notify_cancel(token) == NOTIFY_STATUS_OK) ? 0 : -1);
#else
return (0);
#endif
}
/*
* On error of any notify(3) call, reset 'au_cond' to ensure we re-run
* au_notify_initialize() next time 'round--but assume auditing is on. This
* is a slight performance hit if auditing is off, but at least the system
* will behave correctly. The notification calls are unlikely to fail,
* anyway.
*/
int
au_get_state(void)
{
#if AUDIT_NOTIFICATION_ENABLED
int did_notify;
#endif
int status;
/*
* Don't make the client initialize this set of routines, but take the
* slight performance hit by checking ourselves every time.
*/
if (au_cond == AUC_UNSET) {
status = au_notify_initialize();
if (status != NOTIFY_STATUS_OK) {
if (status == AU_UNIMPL)
return (AU_UNIMPL);
return (AUC_AUDITING);
} else
return (au_cond);
}
#if AUDIT_NOTIFICATION_ENABLED
status = notify_check(token, &did_notify);
if (status != NOTIFY_STATUS_OK) {
au_cond = AUC_UNSET;
return (AUC_AUDITING);
}
if (did_notify == 0)
return (au_cond);
#endif
if (auditon(A_GETCOND, &au_cond, sizeof(long)) < 0) {
/* XXX Reset au_cond to AUC_UNSET? */
syslog(LOG_ERR, "Audit status check failed (%s)",
strerror(errno));
if (errno == ENOSYS) /* Function unimplemented. */
return (AU_UNIMPL);
return (errno);
}
switch (au_cond) {
case AUC_NOAUDIT: /* Auditing suspended. */
case AUC_DISABLED: /* Auditing shut off. */
return (AUC_NOAUDIT);
case AUC_UNSET: /* Uninitialized; shouldn't get here. */
case AUC_AUDITING: /* Audit on. */
default:
return (AUC_AUDITING);
}
}
#endif /* !__APPLE__ */
int
cannot_audit(int val __unused)
{
#ifdef __APPLE__
return (!(au_get_state() == AUC_AUDITING));
#else
long au_cond;
if (auditon(A_GETCOND, &au_cond, sizeof(long)) < 0) {
if (errno != ENOSYS) {
syslog(LOG_ERR, "Audit status check failed (%s)",
strerror(errno));
}
return (1);
}
if (au_cond == AUC_NOAUDIT || au_cond == AUC_DISABLED)
return (1);
return (0);
#endif /* !__APPLE__ */
}
|
