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
|
// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/host/logging.h"
#include <asl.h>
#include <stddef.h>
#include <sys/types.h>
#include <unistd.h>
#include "base/logging.h"
#include "base/scoped_generic.h"
#include "base/strings/string_number_conversions.h"
namespace remoting {
namespace {
const char kChromotingLoggingFacility[] = "org.chromium.chromoting";
// Define a scoper for objects allocated by asl_new.
struct ScopedAslMsgTraits {
static aslmsg InvalidValue() {
return nullptr;
}
static void Free(aslmsg msg) {
asl_free(msg);
}
};
typedef base::ScopedGeneric<aslmsg, ScopedAslMsgTraits> ScopedAslMsg;
// Logging message handler that writes to syslog.
// The log can be obtained by running the following in a terminal:
// syslog -k Facility org.chromium.chromoting
bool LogMessageToAsl(
logging::LogSeverity severity,
const char* file,
int line,
size_t message_start,
const std::string& message) {
int level;
switch(severity) {
case logging::LOG_INFO:
level = ASL_LEVEL_NOTICE;
break;
case logging::LOG_WARNING:
level = ASL_LEVEL_WARNING;
break;
case logging::LOG_ERROR:
case logging::LOG_FATAL:
level = ASL_LEVEL_ERR;
break;
default:
// 'notice' is the lowest priority that the asl libraries will log by
// default.
level = ASL_LEVEL_NOTICE;
break;
}
ScopedAslMsg asl_message(asl_new(ASL_TYPE_MSG));
if (!asl_message.is_valid())
return false;
if (asl_set(asl_message.get(), ASL_KEY_FACILITY,
kChromotingLoggingFacility) != 0)
return false;
if (asl_set(asl_message.get(), ASL_KEY_LEVEL,
base::IntToString(level).c_str()) != 0)
return false;
// Restrict read access to the message to root and the current user.
if (asl_set(asl_message.get(), ASL_KEY_READ_UID,
base::IntToString(geteuid()).c_str()) != 0)
return false;
if (asl_set(asl_message.get(), ASL_KEY_MSG,
message.c_str() + message_start) != 0)
return false;
asl_send(nullptr, asl_message.get());
// Don't prevent message from being logged by traditional means.
return false;
}
} // namespace
void InitHostLogging() {
// Write logs to the system debug log.
logging::LoggingSettings settings;
settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;
logging::InitLogging(settings);
// Write logs to syslog as well.
logging::SetLogMessageHandler(LogMessageToAsl);
}
} // namespace remoting
|
