forked from mongodb/mongo
-
Notifications
You must be signed in to change notification settings - Fork 0
/
log.cpp
158 lines (125 loc) · 4.29 KB
/
log.cpp
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
/** @file log.cpp
*/
/* Copyright 2009 10gen Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "pch.h"
#include "assert_util.h"
#include "assert.h"
#include <cmath>
#include "time_support.h"
using namespace std;
#ifdef _WIN32
# include <io.h>
#else
# include <cxxabi.h>
# include <sys/file.h>
#endif
//#include "../db/jsobj.h"
namespace mongo {
Nullstream nullstream;
vector<Tee*>* Logstream::globalTees = 0;
thread_specific_ptr<Logstream> Logstream::tsp;
class LoggingManager {
public:
LoggingManager()
: _enabled(0) , _file(0) {
}
void start( const string& lp , bool append ) {
uassert( 10268 , "LoggingManager already started" , ! _enabled );
_append = append;
bool exists = boost::filesystem::exists(lp);
// test path
FILE * test = fopen( lp.c_str() , _append ? "a" : "w" );
if ( ! test ) {
if (boost::filesystem::is_directory(lp)) {
cout << "logpath [" << lp << "] should be a file name not a directory" << endl;
}
else {
cout << "can't open [" << lp << "] for log file: " << errnoWithDescription() << endl;
}
dbexit( EXIT_BADOPTIONS );
assert( 0 );
}
if (append && exists){
// two blank lines before and after
const string msg = "\n\n***** SERVER RESTARTED *****\n\n\n";
massert(14036, errnoWithPrefix("couldn't write to log file"),
fwrite(msg.data(), 1, msg.size(), test) == msg.size());
}
fclose( test );
_path = lp;
_enabled = 1;
rotate();
}
void rotate() {
if ( ! _enabled ) {
cout << "LoggingManager not enabled" << endl;
return;
}
if ( _file ) {
#ifdef _WIN32
cout << "log rotation net yet supported on windows" << endl;
return;
#else
#ifdef POSIX_FADV_DONTNEED
posix_fadvise(fileno(_file), 0, 0, POSIX_FADV_DONTNEED);
#endif
struct tm t;
localtime_r( &_opened , &t );
stringstream ss;
ss << _path << "." << terseCurrentTime(false);
string s = ss.str();
rename( _path.c_str() , s.c_str() );
#endif
}
FILE* tmp = freopen(_path.c_str(), (_append ? "a" : "w"), stdout);
if (!tmp) {
cerr << "can't open: " << _path.c_str() << " for log file" << endl;
dbexit( EXIT_BADOPTIONS );
assert(0);
}
#ifdef _WIN32 // windows has these functions it just gives them a funny name
# define dup2 _dup2
# define fileno _fileno
#endif
// redirect stderr to log file
dup2(fileno(tmp), 2);
Logstream::setLogFile(tmp); // after this point no thread will be using old file
#if 0 // enable to test redirection
cout << "written to cout" << endl;
cerr << "written to cerr" << endl;
log() << "written to log()" << endl;
#endif
_file = tmp;
_opened = time(0);
}
private:
bool _enabled;
string _path;
bool _append;
FILE * _file;
time_t _opened;
} loggingManager;
void initLogging( const string& lp , bool append ) {
cout << "all output going to: " << lp << endl;
loggingManager.start( lp , append );
}
void rotateLogs( int signal ) {
loggingManager.rotate();
}
// done *before* static initialization
FILE* Logstream::logfile = stdout;
bool Logstream::isSyslog = false;
}