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
|
// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <sys/stat.h>
#include "common/common_types.h"
#include "common/file_util.h"
#include "common/logging/log.h"
#include "common/make_unique.h"
#include "core/file_sys/disk_archive.h"
#include "core/settings.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
// FileSys namespace
namespace FileSys {
std::unique_ptr<FileBackend> DiskArchive::OpenFile(const Path& path, const Mode mode) const {
LOG_DEBUG(Service_FS, "called path=%s mode=%01X", path.DebugStr().c_str(), mode.hex);
auto file = Common::make_unique<DiskFile>(*this, path, mode);
if (!file->Open())
return nullptr;
return std::move(file);
}
bool DiskArchive::DeleteFile(const Path& path) const {
return FileUtil::Delete(mount_point + path.AsString());
}
bool DiskArchive::RenameFile(const Path& src_path, const Path& dest_path) const {
return FileUtil::Rename(mount_point + src_path.AsString(), mount_point + dest_path.AsString());
}
bool DiskArchive::DeleteDirectory(const Path& path) const {
return FileUtil::DeleteDir(mount_point + path.AsString());
}
ResultCode DiskArchive::CreateFile(const FileSys::Path& path, u32 size) const {
std::string full_path = mount_point + path.AsString();
if (FileUtil::Exists(full_path))
return ResultCode(ErrorDescription::AlreadyExists, ErrorModule::FS, ErrorSummary::NothingHappened, ErrorLevel::Info);
if (size == 0) {
FileUtil::CreateEmptyFile(full_path);
return RESULT_SUCCESS;
}
FileUtil::IOFile file(full_path, "wb");
// Creates a sparse file (or a normal file on filesystems without the concept of sparse files)
// We do this by seeking to the right size, then writing a single null byte.
if (file.Seek(size - 1, SEEK_SET) && file.WriteBytes("", 1) == 1)
return RESULT_SUCCESS;
return ResultCode(ErrorDescription::TooLarge, ErrorModule::FS, ErrorSummary::OutOfResource, ErrorLevel::Info);
}
bool DiskArchive::CreateDirectory(const Path& path) const {
return FileUtil::CreateDir(mount_point + path.AsString());
}
bool DiskArchive::RenameDirectory(const Path& src_path, const Path& dest_path) const {
return FileUtil::Rename(mount_point + src_path.AsString(), mount_point + dest_path.AsString());
}
std::unique_ptr<DirectoryBackend> DiskArchive::OpenDirectory(const Path& path) const {
LOG_DEBUG(Service_FS, "called path=%s", path.DebugStr().c_str());
auto directory = Common::make_unique<DiskDirectory>(*this, path);
if (!directory->Open())
return nullptr;
return std::move(directory);
}
////////////////////////////////////////////////////////////////////////////////////////////////////
DiskFile::DiskFile(const DiskArchive& archive, const Path& path, const Mode mode) {
// TODO(Link Mauve): normalize path into an absolute path without "..", it can currently bypass
// the root directory we set while opening the archive.
// For example, opening /../../etc/passwd can give the emulated program your users list.
this->path = archive.mount_point + path.AsString();
this->mode.hex = mode.hex;
}
bool DiskFile::Open() {
if (!mode.create_flag && !FileUtil::Exists(path)) {
LOG_ERROR(Service_FS, "Non-existing file %s can't be open without mode create.", path.c_str());
return false;
}
std::string mode_string;
if (mode.create_flag)
mode_string = "w+";
else if (mode.write_flag)
mode_string = "r+"; // Files opened with Write access can be read from
else if (mode.read_flag)
mode_string = "r";
// Open the file in binary mode, to avoid problems with CR/LF on Windows systems
mode_string += "b";
file = Common::make_unique<FileUtil::IOFile>(path, mode_string.c_str());
return true;
}
size_t DiskFile::Read(const u64 offset, const u32 length, u8* buffer) const {
file->Seek(offset, SEEK_SET);
return file->ReadBytes(buffer, length);
}
size_t DiskFile::Write(const u64 offset, const u32 length, const u32 flush, const u8* buffer) const {
file->Seek(offset, SEEK_SET);
size_t written = file->WriteBytes(buffer, length);
if (flush)
file->Flush();
return written;
}
size_t DiskFile::GetSize() const {
return static_cast<size_t>(file->GetSize());
}
bool DiskFile::SetSize(const u64 size) const {
file->Resize(size);
file->Flush();
return true;
}
bool DiskFile::Close() const {
return file->Close();
}
////////////////////////////////////////////////////////////////////////////////////////////////////
DiskDirectory::DiskDirectory(const DiskArchive& archive, const Path& path) {
// TODO(Link Mauve): normalize path into an absolute path without "..", it can currently bypass
// the root directory we set while opening the archive.
// For example, opening /../../usr/bin can give the emulated program your installed programs.
this->path = archive.mount_point + path.AsString();
}
bool DiskDirectory::Open() {
if (!FileUtil::IsDirectory(path))
return false;
FileUtil::ScanDirectoryTree(path, directory);
children_iterator = directory.children.begin();
return true;
}
u32 DiskDirectory::Read(const u32 count, Entry* entries) {
u32 entries_read = 0;
while (entries_read < count && children_iterator != directory.children.cend()) {
const FileUtil::FSTEntry& file = *children_iterator;
const std::string& filename = file.virtualName;
Entry& entry = entries[entries_read];
LOG_TRACE(Service_FS, "File %s: size=%llu dir=%d", filename.c_str(), file.size, file.isDirectory);
// TODO(Link Mauve): use a proper conversion to UTF-16.
for (size_t j = 0; j < FILENAME_LENGTH; ++j) {
entry.filename[j] = filename[j];
if (!filename[j])
break;
}
FileUtil::SplitFilename83(filename, entry.short_name, entry.extension);
entry.is_directory = file.isDirectory;
entry.is_hidden = (filename[0] == '.');
entry.is_read_only = 0;
entry.file_size = file.size;
// We emulate a SD card where the archive bit has never been cleared, as it would be on
// most user SD cards.
// Some homebrews (blargSNES for instance) are known to mistakenly use the archive bit as a
// file bit.
entry.is_archive = !file.isDirectory;
++entries_read;
++children_iterator;
}
return entries_read;
}
} // namespace FileSys
|
