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
|
// Copyright (C) 2021 The Qt Company Ltd.
// Copyright (C) 2019 Luxoft Sweden AB
// Copyright (C) 2018 Pelagicore AG
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "logging.h"
#include "scopeutilities.h"
#include "sudo.h"
#include "utilities.h"
QT_BEGIN_NAMESPACE_AM
ScopedDirectoryCreator::ScopedDirectoryCreator()
{ }
bool ScopedDirectoryCreator::create(const QString &path, bool removeExisting)
{
m_path = path;
QFileInfo fi(m_path);
if (fi.exists() && fi.isDir()) {
if (!removeExisting)
return m_created = true;
else if (!SudoClient::instance()->removeRecursive(m_path))
return false;
}
//qWarning() << "CREATE" << path << fi.absolutePath() << fi.fileName();
return m_created = QDir::root().mkpath(path);
}
bool ScopedDirectoryCreator::take()
{
if (m_created && !m_taken)
m_taken = true;
return m_taken;
}
bool ScopedDirectoryCreator::destroy()
{
if (!m_taken) {
if (m_created)
SudoClient::instance()->removeRecursive(m_path);
m_taken = true;
}
return m_taken;
}
ScopedDirectoryCreator::~ScopedDirectoryCreator()
{
destroy();
}
QDir ScopedDirectoryCreator::dir()
{
return QDir(m_path);
}
ScopedRenamer::ScopedRenamer()
{ }
bool ScopedRenamer::internalRename(const QDir &dir, const QString &from, const QString &to)
{
QFileInfo fromInfo(dir.absoluteFilePath(from));
QFileInfo toInfo(dir.absoluteFilePath(to));
// POSIX cannot atomically rename directories, if the destination directory exists
// and is non-empty. We need to delete it first.
// Windows on the other hand cannot do anything atomically.
#ifdef Q_OS_UNIX
if (fromInfo.isDir()) {
#else
Q_UNUSED(fromInfo)
if (true) {
#endif
if (toInfo.exists() && !recursiveOperation(toInfo.absoluteFilePath(), safeRemove))
return false;
}
#ifdef Q_OS_UNIX
return (::rename(fromInfo.absoluteFilePath().toLocal8Bit(), toInfo.absoluteFilePath().toLocal8Bit()) == 0);
#else
return QDir(dir).rename(from, to);
#endif
}
bool ScopedRenamer::rename(const QString &baseName, ScopedRenamer::Modes modes)
{
QFileInfo fi(baseName);
m_basePath.setPath(fi.absolutePath());
m_name = fi.fileName();
m_requested = modes;
// convenience
bool backupRequired = (modes & NameToNameMinus);
bool backupDone = false;
if (m_requested & NameToNameMinus) {
backupDone = internalRename(m_basePath, m_name, m_name + u'-');
if (backupDone)
m_done |= NameToNameMinus;
}
if (m_requested & NamePlusToName) {
// only try if no backup required, or it worked
if (!backupRequired || backupDone) {
if (internalRename(m_basePath, m_name + u'+', m_name)) {
m_done |= NamePlusToName;
}
else if (backupDone && !undoRename()) {
qCCritical(LogSystem) << QString::fromLatin1("failed to rename '%1+' to '%1', but also failed to rename backup '%1-' back to '%1' (in directory %2)")
.arg(m_name, m_basePath.absolutePath());
}
}
}
return m_requested == m_done;
}
bool ScopedRenamer::rename(const QDir &baseName, ScopedRenamer::Modes modes)
{
return rename(baseName.absolutePath(), modes);
}
bool ScopedRenamer::take()
{
if (!m_taken)
m_taken = true;
return m_taken;
}
bool ScopedRenamer::undoRename()
{
if (!m_taken) {
if (interalUndoRename()) {
m_taken = true;
} else {
if (m_done & NamePlusToName) {
qCCritical(LogSystem) << QString::fromLatin1("failed to undo rename from '%1+' to '%1' (in directory %2)")
.arg(m_name, m_basePath.absolutePath());
}
if (m_done & NameToNameMinus) {
qCCritical(LogSystem) << QString::fromLatin1("failed to undo rename from '%1' to '%1-' (in directory %2)")
.arg(m_name, m_basePath.absolutePath());
}
}
}
return m_taken;
}
bool ScopedRenamer::interalUndoRename()
{
if (m_done & NamePlusToName) {
if (internalRename(m_basePath, m_name, m_name + u'+'))
m_done &= ~NamePlusToName;
}
if (m_done & NameToNameMinus) {
if (internalRename(m_basePath, m_name + u'-', m_name))
m_done &= ~NameToNameMinus;
}
return (m_done == 0);
}
ScopedRenamer::~ScopedRenamer()
{
undoRename();
}
bool ScopedRenamer::isRenamed() const
{
return m_requested && (m_requested == m_done);
}
QString ScopedRenamer::baseName() const
{
return m_basePath.absoluteFilePath(m_name);
}
QT_END_NAMESPACE_AM
|
