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
|
// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/filesystem/util.h"
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <time.h>
#include <limits>
#include "base/logging.h"
#include "base/strings/string_util.h"
#include "build/build_config.h"
#include "mojo/public/cpp/bindings/string.h"
#if defined(OS_WIN)
#include "base/strings/utf_string_conversions.h"
#endif
// module filesystem has various constants which must line up with enum values
// in base::File::Flags.
static_assert(filesystem::kFlagOpen ==
static_cast<uint32_t>(base::File::FLAG_OPEN),
"");
static_assert(filesystem::kFlagCreate ==
static_cast<uint32_t>(base::File::FLAG_CREATE),
"");
static_assert(filesystem::kFlagOpenAlways ==
static_cast<uint32_t>(base::File::FLAG_OPEN_ALWAYS),
"");
static_assert(filesystem::kCreateAlways ==
static_cast<uint32_t>(base::File::FLAG_CREATE_ALWAYS),
"");
static_assert(filesystem::kFlagOpenTruncated ==
static_cast<uint32_t>(base::File::FLAG_OPEN_TRUNCATED),
"");
static_assert(filesystem::kFlagRead ==
static_cast<uint32_t>(base::File::FLAG_READ),
"");
static_assert(filesystem::kFlagWrite ==
static_cast<uint32_t>(base::File::FLAG_WRITE),
"");
static_assert(filesystem::kFlagAppend ==
static_cast<uint32_t>(base::File::FLAG_APPEND),
"");
// filesystem.Error in types.mojom must be the same as base::File::Error.
static_assert(static_cast<int>(filesystem::FILE_ERROR_OK) ==
static_cast<int>(base::File::FILE_OK),
"");
static_assert(static_cast<int>(filesystem::FILE_ERROR_FAILED) ==
static_cast<int>(base::File::FILE_ERROR_FAILED),
"");
static_assert(static_cast<int>(filesystem::FILE_ERROR_IN_USE) ==
static_cast<int>(base::File::FILE_ERROR_IN_USE),
"");
static_assert(static_cast<int>(filesystem::FILE_ERROR_EXISTS) ==
static_cast<int>(base::File::FILE_ERROR_EXISTS),
"");
static_assert(static_cast<int>(filesystem::FILE_ERROR_NOT_FOUND) ==
static_cast<int>(base::File::FILE_ERROR_NOT_FOUND),
"");
static_assert(static_cast<int>(filesystem::FILE_ERROR_ACCESS_DENIED) ==
static_cast<int>(base::File::FILE_ERROR_ACCESS_DENIED),
"");
static_assert(static_cast<int>(filesystem::FILE_ERROR_TOO_MANY_OPENED) ==
static_cast<int>(base::File::FILE_ERROR_TOO_MANY_OPENED),
"");
static_assert(static_cast<int>(filesystem::FILE_ERROR_NO_MEMORY) ==
static_cast<int>(base::File::FILE_ERROR_NO_MEMORY),
"");
static_assert(static_cast<int>(filesystem::FILE_ERROR_NO_SPACE) ==
static_cast<int>(base::File::FILE_ERROR_NO_SPACE),
"");
static_assert(static_cast<int>(filesystem::FILE_ERROR_NOT_A_DIRECTORY) ==
static_cast<int>(base::File::FILE_ERROR_NOT_A_DIRECTORY),
"");
static_assert(static_cast<int>(filesystem::FILE_ERROR_INVALID_OPERATION) ==
static_cast<int>(base::File::FILE_ERROR_INVALID_OPERATION),
"");
static_assert(static_cast<int>(filesystem::FILE_ERROR_SECURITY) ==
static_cast<int>(base::File::FILE_ERROR_SECURITY),
"");
static_assert(static_cast<int>(filesystem::FILE_ERROR_ABORT) ==
static_cast<int>(base::File::FILE_ERROR_ABORT),
"");
static_assert(static_cast<int>(filesystem::FILE_ERROR_NOT_A_FILE) ==
static_cast<int>(base::File::FILE_ERROR_NOT_A_FILE),
"");
static_assert(static_cast<int>(filesystem::FILE_ERROR_NOT_EMPTY) ==
static_cast<int>(base::File::FILE_ERROR_NOT_EMPTY),
"");
static_assert(static_cast<int>(filesystem::FILE_ERROR_INVALID_URL) ==
static_cast<int>(base::File::FILE_ERROR_INVALID_URL),
"");
static_assert(static_cast<int>(filesystem::FILE_ERROR_IO) ==
static_cast<int>(base::File::FILE_ERROR_IO),
"");
// filesystem.Whence in types.mojom must be the same as base::File::Whence.
static_assert(static_cast<int>(filesystem::WHENCE_FROM_BEGIN) ==
static_cast<int>(base::File::FROM_BEGIN),
"");
static_assert(static_cast<int>(filesystem::WHENCE_FROM_CURRENT) ==
static_cast<int>(base::File::FROM_CURRENT),
"");
static_assert(static_cast<int>(filesystem::WHENCE_FROM_END) ==
static_cast<int>(base::File::FROM_END),
"");
namespace filesystem {
FileError IsWhenceValid(Whence whence) {
return (whence == WHENCE_FROM_CURRENT || whence == WHENCE_FROM_BEGIN ||
whence == WHENCE_FROM_END)
? FILE_ERROR_OK
: FILE_ERROR_INVALID_OPERATION;
}
FileError IsOffsetValid(int64_t offset) {
return (offset >= std::numeric_limits<off_t>::min() &&
offset <= std::numeric_limits<off_t>::max())
? FILE_ERROR_OK
: FILE_ERROR_INVALID_OPERATION;
}
FileError GetError(const base::File& file) {
return static_cast<filesystem::FileError>(file.error_details());
}
FileInformationPtr MakeFileInformation(const base::File::Info& info) {
FileInformationPtr file_info(FileInformation::New());
file_info->type =
info.is_directory ? FS_FILE_TYPE_DIRECTORY : FS_FILE_TYPE_REGULAR_FILE;
file_info->size = info.size;
file_info->atime = info.last_accessed.ToDoubleT();
file_info->mtime = info.last_modified.ToDoubleT();
file_info->ctime = info.creation_time.ToDoubleT();
return file_info;
}
FileError ValidatePath(const mojo::String& raw_path,
const base::FilePath& filesystem_base,
base::FilePath* out) {
DCHECK(!raw_path.is_null());
if (!base::IsStringUTF8(raw_path.get()))
return FILE_ERROR_INVALID_OPERATION;
#if defined(OS_POSIX)
base::FilePath::StringType path = raw_path;
#elif defined(OS_WIN)
base::FilePath::StringType path = base::UTF8ToUTF16(raw_path.get());
#endif
// TODO(erg): This isn't really what we want. FilePath::AppendRelativePath()
// is closer. We need to deal with entirely hostile apps trying to bust this
// function to use a possibly maliciously provided |raw_path| to bust out of
// |filesystem_base|.
base::FilePath full_path = filesystem_base.Append(path);
if (full_path.ReferencesParent()) {
// TODO(erg): For now, if it references a parent, we'll consider this bad.
return FILE_ERROR_ACCESS_DENIED;
}
*out = full_path;
return FILE_ERROR_OK;
}
} // namespace filesystem
|
