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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
|
/* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Data Differential Utility library
*
* Copyright (C) 2012 Data Differential, http://datadifferential.com/
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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.
*
* * The names of its contributors may not be used to endorse or
* promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
* OWNER OR 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.
*
*/
#pragma once
#include <cerrno>
#include <cstdarg>
#include <cstdio>
#include <fcntl.h>
#include <iostream>
#include <string>
#include <syslog.h>
#define UTIL_MAX_ERROR_SIZE 2048
namespace datadifferential {
namespace util {
/** Verbosity levels.
*/
enum verbose_t
{
// Logging this will cause shutdown
VERBOSE_FATAL= LOG_EMERG, // syslog:LOG_EMERG
VERBOSE_ALERT= LOG_ALERT, // syslog:LOG_ALERT
VERBOSE_CRITICAL= LOG_CRIT, // syslog:LOG_CRIT
VERBOSE_ERROR= LOG_ERR, // syslog:LOG_ERR
VERBOSE_WARN= LOG_WARNING, // syslog:LOG_WARNING
VERBOSE_NOTICE= LOG_NOTICE, // syslog:LOG_NOTICE
VERBOSE_INFO= LOG_INFO, // syslog:LOG_INFO
VERBOSE_DEBUG= LOG_DEBUG // syslog:LOG_DEBUG
};
#ifndef __INTEL_COMPILER
#pragma GCC diagnostic ignored "-Wformat-nonliteral"
#endif
struct log_info_st
{
std::string name;
std::string filename;
int fd;
bool opt_syslog;
bool opt_file;
bool init_success;
log_info_st(const std::string& name_arg, const std::string &filename_arg, bool syslog_arg) :
name(name_arg),
filename(filename_arg),
fd(-1),
opt_syslog(syslog_arg),
opt_file(false),
init_success(false)
{
if (opt_syslog)
{
openlog(name.c_str(), LOG_PID | LOG_NDELAY, LOG_USER);
}
init();
}
void init()
{
if (filename.size())
{
if (filename.compare("stderr") == 0)
{
fd= STDERR_FILENO;
}
else
{
fd= open(filename.c_str(), O_CREAT | O_WRONLY | O_APPEND, 0644);
if (fd == -1)
{
if (opt_syslog)
{
char buffer[1024];
char *getcwd_ret= getcwd(buffer, sizeof(buffer));
syslog(LOG_ERR, "Could not open log file \"%.*s\", from \"%s\", open failed with (%s)",
int(filename.size()), filename.c_str(),
getcwd_ret,
strerror(errno));
}
std::cerr << "Could not open log file for writing, switching to stderr." << std::endl;
fd= STDERR_FILENO;
}
}
opt_file= true;
}
init_success= true;
}
bool initialized() const
{
return init_success;
}
int file() const
{
return fd;
}
void write(verbose_t verbose, const char *format, ...)
{
if (opt_file or opt_syslog)
{
va_list args;
va_start(args, format);
char mesg[BUFSIZ];
int mesg_length= vsnprintf(mesg, sizeof(mesg), format, args);
va_end(args);
if (opt_file)
{
char buffer[UTIL_MAX_ERROR_SIZE];
int buffer_length= snprintf(buffer, sizeof(buffer), "%7s %.*s\n", verbose_name(verbose), mesg_length, mesg);
if (::write(file(), buffer, buffer_length) == -1)
{
std::cerr << "Could not write to log file." << std::endl;
syslog(LOG_EMERG, "gearmand could not open log file %s, got error %s", filename.c_str(), strerror(errno));
}
}
if (opt_syslog)
{
syslog(int(verbose), "%7s %.*s", verbose_name(verbose), mesg_length, mesg);
}
}
}
~log_info_st()
{
if (fd != -1 and fd != STDERR_FILENO)
{
close(fd);
}
if (opt_syslog)
{
closelog();
}
}
private:
const char *verbose_name(verbose_t verbose)
{
switch (verbose)
{
case VERBOSE_FATAL:
return "FATAL";
case VERBOSE_ALERT:
return "ALERT";
case VERBOSE_CRITICAL:
return "CRITICAL";
case VERBOSE_ERROR:
return "ERROR";
case VERBOSE_WARN:
return "WARNING";
case VERBOSE_NOTICE:
return "NOTICE";
case VERBOSE_INFO:
return "INFO";
case VERBOSE_DEBUG:
return "DEBUG";
default:
break;
}
return "UNKNOWN";
}
};
} // namespace util
} // namespace datadifferential
|
