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
|
// Copyright (c) 2018, 2025, Oracle and/or its affiliates.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License, version 2.0,
// as published by the Free Software Foundation.
//
// This program is designed to work with certain software (including
// but not limited to OpenSSL) that is licensed under separate terms,
// as designated in a particular file or component or in included license
// documentation. The authors of MySQL hereby grant you an additional
// permission to link the program and your derivative works with the
// separately licensed software that they have either included with
// the program or referenced in the documentation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License, version 2.0, for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#include "client/mysqltest/logfile.h"
#include <cstring>
#include <iostream>
#include <string>
Logfile::Logfile() : m_file(nullptr), m_bytes_written(0) {
std::memset(m_filename, 0, sizeof(m_filename));
}
bool Logfile::flush() {
if (m_file && std::fflush(m_file)) {
// Flush failed, thrown an error.
std::cerr << "Failed to flush the contents to file '" << m_filename
<< "': " << std::strerror(errno) << ", errno: " << errno
<< std::endl;
return true;
}
return false;
}
bool Logfile::open(const char *dirname, const char *filename, const char *ext) {
if (!filename) {
m_file = stdout;
} else {
fn_format(m_filename, filename, dirname, ext,
*dirname ? MY_REPLACE_DIR | MY_REPLACE_EXT : MY_REPLACE_EXT);
this->close();
// Open a file, print an error message if the operation fails.
if ((m_file = std::fopen(m_filename, "wb+")) == nullptr) {
std::cerr << "Failed to open log file '" << m_filename
<< "': " << std::strerror(errno) << ", errno: " << errno
<< std::endl;
return true;
}
}
return false;
}
bool Logfile::write(const char *data, std::size_t length) {
if (length > 0) {
if (std::fwrite(data, 1, length, m_file) != length) {
std::cerr << "Failed to write " << length << "bytes to '" << m_filename
<< "': " << std::strerror(errno) << ", errno: " << errno
<< std::endl;
return true;
}
m_bytes_written += length;
}
return false;
}
void Logfile::close() {
if (m_file) {
if (m_file == stdout)
std::fflush(m_file);
else
std::fclose(m_file);
}
m_file = nullptr;
}
void Logfile::show_tail(unsigned int lines) {
if (!m_file || m_file == stdout || lines == 0) return;
// Move to end of the file.
if (std::fseek(m_file, 0, SEEK_END) != 0) {
std::cerr << "fseek() failed: " << std::strerror(errno)
<< ", errno: " << errno << std::endl;
return;
}
int position = std::ftell(m_file);
unsigned int count = 0;
while (position) {
std::fseek(m_file, --position, SEEK_SET);
// Read one character at a time, and stop reading when N number of
// newline characters are found.
if ((std::fgetc(m_file) == '\n') && (count++ == lines)) break;
}
std::cerr << std::endl
<< "The result from queries just before the failure was:"
<< std::endl;
char buffer[256];
std::size_t bytes;
if (count <= lines) std::fseek(m_file, 0L, SEEK_SET);
while ((bytes = std::fread(buffer, 1, sizeof(buffer), m_file)) > 0) {
if (std::fwrite(buffer, 1, bytes, stderr) != bytes)
std::cerr << "fwrite failed: " << std::strerror(errno)
<< ", errno: " << errno << std::endl;
}
std::fflush(stderr);
}
|
