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
|
//
// Copyright(c) 2015 Gabi Melman.
// Distributed under the MIT License (http://opensource.org/licenses/MIT)
//
#pragma once
// Helper class for file sink
// When failing to open a file, retry several times(5) with small delay between the tries(10 ms)
// Throw spdlog_ex exception on errors
#include "../details/log_msg.h"
#include "../details/os.h"
#include <cerrno>
#include <chrono>
#include <cstdio>
#include <string>
#include <thread>
#include <tuple>
namespace spdlog {
namespace details {
class file_helper
{
public:
const int open_tries = 5;
const int open_interval = 10;
explicit file_helper() = default;
file_helper(const file_helper &) = delete;
file_helper &operator=(const file_helper &) = delete;
~file_helper()
{
close();
}
void open(const filename_t &fname, bool truncate = false)
{
close();
auto *mode = truncate ? SPDLOG_FILENAME_T("wb") : SPDLOG_FILENAME_T("ab");
_filename = fname;
for (int tries = 0; tries < open_tries; ++tries)
{
if (!os::fopen_s(&_fd, fname, mode))
{
return;
}
details::os::sleep_for_millis(open_interval);
}
throw spdlog_ex("Failed opening file " + os::filename_to_str(_filename) + " for writing", errno);
}
void reopen(bool truncate)
{
if (_filename.empty())
{
throw spdlog_ex("Failed re opening file - was not opened before");
}
open(_filename, truncate);
}
void flush()
{
std::fflush(_fd);
}
void close()
{
if (_fd != nullptr)
{
std::fclose(_fd);
_fd = nullptr;
}
}
void write(const log_msg &msg)
{
size_t msg_size = msg.formatted.size();
auto data = msg.formatted.data();
if (std::fwrite(data, 1, msg_size, _fd) != msg_size)
{
throw spdlog_ex("Failed writing to file " + os::filename_to_str(_filename), errno);
}
}
size_t size() const
{
if (_fd == nullptr)
{
throw spdlog_ex("Cannot use size() on closed file " + os::filename_to_str(_filename));
}
return os::filesize(_fd);
}
const filename_t &filename() const
{
return _filename;
}
static bool file_exists(const filename_t &fname)
{
return os::file_exists(fname);
}
//
// return file path and its extension:
//
// "mylog.txt" => ("mylog", ".txt")
// "mylog" => ("mylog", "")
// "mylog." => ("mylog.", "")
// "/dir1/dir2/mylog.txt" => ("/dir1/dir2/mylog", ".txt")
//
// the starting dot in filenames is ignored (hidden files):
//
// ".mylog" => (".mylog". "")
// "my_folder/.mylog" => ("my_folder/.mylog", "")
// "my_folder/.mylog.txt" => ("my_folder/.mylog", ".txt")
static std::tuple<filename_t, filename_t> split_by_extenstion(const spdlog::filename_t &fname)
{
auto ext_index = fname.rfind('.');
// no valid extension found - return whole path and empty string as extension
if (ext_index == filename_t::npos || ext_index == 0 || ext_index == fname.size() - 1)
{
return std::make_tuple(fname, spdlog::filename_t());
}
// treat casese like "/etc/rc.d/somelogfile or "/abc/.hiddenfile"
auto folder_index = fname.rfind(details::os::folder_sep);
if (folder_index != fname.npos && folder_index >= ext_index - 1)
{
return std::make_tuple(fname, spdlog::filename_t());
}
// finally - return a valid base and extension tuple
return std::make_tuple(fname.substr(0, ext_index), fname.substr(ext_index));
}
private:
FILE *_fd{nullptr};
filename_t _filename;
};
} // namespace details
} // namespace spdlog
|