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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/file_util.h" | 5 #include "base/file_util.h" |
6 | 6 |
7 #include <windows.h> | 7 #include <windows.h> |
8 #include <propvarutil.h> | 8 #include <propvarutil.h> |
9 #include <psapi.h> | 9 #include <psapi.h> |
10 #include <shellapi.h> | 10 #include <shellapi.h> |
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125 } while (FindNextFile(find_handle, &find_file_data)); | 125 } while (FindNextFile(find_handle, &find_file_data)); |
126 FindClose(find_handle); | 126 FindClose(find_handle); |
127 } | 127 } |
128 | 128 |
129 return file_count; | 129 return file_count; |
130 } | 130 } |
131 | 131 |
132 bool Delete(const FilePath& path, bool recursive) { | 132 bool Delete(const FilePath& path, bool recursive) { |
133 base::ThreadRestrictions::AssertIOAllowed(); | 133 base::ThreadRestrictions::AssertIOAllowed(); |
134 | 134 |
135 if (path.value().length() >= MAX_PATH) | 135 base::PlatformFileInfo file_info; |
136 return false; | 136 if (!GetFileInfo(path, &file_info)) |
137 return true; | |
137 | 138 |
138 if (!recursive) { | 139 if (!file_info.is_directory) |
139 // If not recursing, then first check to see if |path| is a directory. | 140 return (DeleteFile(path.value().c_str()) != 0); |
140 // If it is, then remove it with RemoveDirectory. | |
141 base::PlatformFileInfo file_info; | |
142 if (GetFileInfo(path, &file_info) && file_info.is_directory) | |
143 return RemoveDirectory(path.value().c_str()) != 0; | |
144 | 141 |
145 // Otherwise, it's a file, wildcard or non-existant. Try DeleteFile first | 142 if (!recursive) |
146 // because it should be faster. If DeleteFile fails, then we fall through | 143 return RemoveDirectory(path.value().c_str()) != 0; |
147 // to SHFileOperation, which will do the right thing. | 144 |
148 if (DeleteFile(path.value().c_str()) != 0) | 145 // Matches posix version of iterating directories. |
149 return true; | 146 bool success = true; |
147 std::stack<FilePath::StringType> directories; | |
148 directories.push(path.value()); | |
149 FileEnumerator traversal(path, true, static_cast<FileEnumerator::FILE_TYPE>( | |
150 FileEnumerator::FILES | FileEnumerator::DIRECTORIES)); | |
151 | |
152 for (FilePath current = traversal.Next(); success && !current.empty(); | |
153 current = traversal.Next()) { | |
154 FileEnumerator::FindInfo info; | |
155 traversal.GetFindInfo(&info); | |
156 if (traversal.IsDirectory(info)) { | |
157 directories.push(current.value()); | |
158 } else { | |
159 // This is needed because DeleteFile can fail for read-only files. | |
michaeln
2010/12/17 02:32:03
Should the read-only attribute testing/fixing also
Kavita Kanetkar
2010/12/23 03:14:28
Done.
| |
160 DWORD attributes = ::GetFileAttributes(current.value().c_str()); | |
161 if (attributes != INVALID_FILE_ATTRIBUTES && | |
162 attributes & FILE_ATTRIBUTE_READONLY) { | |
163 ::SetFileAttributes(current.value().c_str(), | |
164 attributes &~ FILE_ATTRIBUTE_READONLY); | |
165 } | |
166 success = (DeleteFile(current.value().c_str()) != 0); | |
167 } | |
150 } | 168 } |
151 | 169 |
152 // SHFILEOPSTRUCT wants the path to be terminated with two NULLs, | 170 while (success && !directories.empty()) { |
153 // so we have to use wcscpy because wcscpy_s writes non-NULLs | 171 FilePath dir = FilePath(directories.top()); |
154 // into the rest of the buffer. | 172 directories.pop(); |
155 wchar_t double_terminated_path[MAX_PATH + 1] = {0}; | 173 success = (RemoveDirectory(dir.value().c_str()) != 0); |
156 #pragma warning(suppress:4996) // don't complain about wcscpy deprecation | 174 } |
157 wcscpy(double_terminated_path, path.value().c_str()); | 175 return success; |
158 | |
159 SHFILEOPSTRUCT file_operation = {0}; | |
160 file_operation.wFunc = FO_DELETE; | |
161 file_operation.pFrom = double_terminated_path; | |
162 file_operation.fFlags = FOF_NOERRORUI | FOF_SILENT | FOF_NOCONFIRMATION; | |
163 if (!recursive) | |
164 file_operation.fFlags |= FOF_NORECURSION | FOF_FILESONLY; | |
165 int err = SHFileOperation(&file_operation); | |
166 // Some versions of Windows return ERROR_FILE_NOT_FOUND (0x2) when deleting | |
167 // an empty directory and some return 0x402 when they should be returning | |
168 // ERROR_FILE_NOT_FOUND. MSDN says Vista and up won't return 0x402. | |
169 return (err == 0 || err == ERROR_FILE_NOT_FOUND || err == 0x402); | |
170 } | 176 } |
171 | 177 |
172 bool DeleteAfterReboot(const FilePath& path) { | 178 bool DeleteAfterReboot(const FilePath& path) { |
173 base::ThreadRestrictions::AssertIOAllowed(); | 179 base::ThreadRestrictions::AssertIOAllowed(); |
174 | 180 |
175 if (path.value().length() >= MAX_PATH) | 181 if (path.value().length() >= MAX_PATH) |
176 return false; | 182 return false; |
177 | 183 |
178 return MoveFileEx(path.value().c_str(), NULL, | 184 return MoveFileEx(path.value().c_str(), NULL, |
179 MOVEFILE_DELAY_UNTIL_REBOOT | | 185 MOVEFILE_DELAY_UNTIL_REBOOT | |
180 MOVEFILE_REPLACE_EXISTING) != FALSE; | 186 MOVEFILE_REPLACE_EXISTING) != FALSE; |
181 } | 187 } |
182 | 188 |
183 bool Move(const FilePath& from_path, const FilePath& to_path) { | 189 bool Move(const FilePath& from_path, const FilePath& to_path) { |
184 base::ThreadRestrictions::AssertIOAllowed(); | 190 base::ThreadRestrictions::AssertIOAllowed(); |
185 | 191 |
186 // NOTE: I suspect we could support longer paths, but that would involve | |
187 // analyzing all our usage of files. | |
188 if (from_path.value().length() >= MAX_PATH || | |
189 to_path.value().length() >= MAX_PATH) { | |
190 return false; | |
191 } | |
192 if (MoveFileEx(from_path.value().c_str(), to_path.value().c_str(), | 192 if (MoveFileEx(from_path.value().c_str(), to_path.value().c_str(), |
193 MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING) != 0) | 193 MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING) != 0) |
194 return true; | 194 return true; |
195 if (DirectoryExists(from_path)) { | 195 if (DirectoryExists(from_path)) { |
196 // MoveFileEx fails if moving directory across volumes. We will simulate | 196 // MoveFileEx fails if moving directory across volumes. We will simulate |
197 // the move by using Copy and Delete. Ideally we could check whether | 197 // the move by using Copy and Delete. Ideally we could check whether |
198 // from_path and to_path are indeed in different volumes. | 198 // from_path and to_path are indeed in different volumes. |
199 return CopyAndDeleteDirectory(from_path, to_path); | 199 return CopyAndDeleteDirectory(from_path, to_path); |
200 } | 200 } |
201 return false; | 201 return false; |
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218 // When writing to a network share, we may not be able to change the ACLs. | 218 // When writing to a network share, we may not be able to change the ACLs. |
219 // Ignore ACL errors then (REPLACEFILE_IGNORE_MERGE_ERRORS). | 219 // Ignore ACL errors then (REPLACEFILE_IGNORE_MERGE_ERRORS). |
220 return ::ReplaceFile(to_path.value().c_str(), | 220 return ::ReplaceFile(to_path.value().c_str(), |
221 from_path.value().c_str(), NULL, | 221 from_path.value().c_str(), NULL, |
222 REPLACEFILE_IGNORE_MERGE_ERRORS, NULL, NULL) ? true : false; | 222 REPLACEFILE_IGNORE_MERGE_ERRORS, NULL, NULL) ? true : false; |
223 } | 223 } |
224 | 224 |
225 bool CopyFile(const FilePath& from_path, const FilePath& to_path) { | 225 bool CopyFile(const FilePath& from_path, const FilePath& to_path) { |
226 base::ThreadRestrictions::AssertIOAllowed(); | 226 base::ThreadRestrictions::AssertIOAllowed(); |
227 | 227 |
228 // NOTE: I suspect we could support longer paths, but that would involve | |
229 // analyzing all our usage of files. | |
230 if (from_path.value().length() >= MAX_PATH || | |
231 to_path.value().length() >= MAX_PATH) { | |
232 return false; | |
233 } | |
234 return (::CopyFile(from_path.value().c_str(), to_path.value().c_str(), | 228 return (::CopyFile(from_path.value().c_str(), to_path.value().c_str(), |
235 false) != 0); | 229 false) != 0); |
236 } | 230 } |
237 | 231 |
238 bool ShellCopy(const FilePath& from_path, const FilePath& to_path, | |
239 bool recursive) { | |
240 base::ThreadRestrictions::AssertIOAllowed(); | |
241 | |
242 // NOTE: I suspect we could support longer paths, but that would involve | |
243 // analyzing all our usage of files. | |
244 if (from_path.value().length() >= MAX_PATH || | |
245 to_path.value().length() >= MAX_PATH) { | |
246 return false; | |
247 } | |
248 | |
249 // SHFILEOPSTRUCT wants the path to be terminated with two NULLs, | |
250 // so we have to use wcscpy because wcscpy_s writes non-NULLs | |
251 // into the rest of the buffer. | |
252 wchar_t double_terminated_path_from[MAX_PATH + 1] = {0}; | |
253 wchar_t double_terminated_path_to[MAX_PATH + 1] = {0}; | |
254 #pragma warning(suppress:4996) // don't complain about wcscpy deprecation | |
255 wcscpy(double_terminated_path_from, from_path.value().c_str()); | |
256 #pragma warning(suppress:4996) // don't complain about wcscpy deprecation | |
257 wcscpy(double_terminated_path_to, to_path.value().c_str()); | |
258 | |
259 SHFILEOPSTRUCT file_operation = {0}; | |
260 file_operation.wFunc = FO_COPY; | |
261 file_operation.pFrom = double_terminated_path_from; | |
262 file_operation.pTo = double_terminated_path_to; | |
263 file_operation.fFlags = FOF_NOERRORUI | FOF_SILENT | FOF_NOCONFIRMATION | | |
264 FOF_NOCONFIRMMKDIR; | |
265 if (!recursive) | |
266 file_operation.fFlags |= FOF_NORECURSION | FOF_FILESONLY; | |
267 | |
268 return (SHFileOperation(&file_operation) == 0); | |
269 } | |
270 | |
271 bool CopyDirectory(const FilePath& from_path, const FilePath& to_path, | 232 bool CopyDirectory(const FilePath& from_path, const FilePath& to_path, |
272 bool recursive) { | 233 bool recursive) { |
273 base::ThreadRestrictions::AssertIOAllowed(); | 234 base::ThreadRestrictions::AssertIOAllowed(); |
235 FilePath real_to_path = to_path; | |
236 if (PathExists(real_to_path)) { | |
237 if (!real_to_path.StartsWithExtendedPathPrefix() && | |
238 !AbsolutePath(&real_to_path)) | |
michaeln
2010/12/17 02:32:03
Maybe AbsolutePath should test for the extended pa
Kavita Kanetkar
2010/12/23 03:14:28
As discussed, leaving this as-is.
On 2010/12/17 0
| |
239 return false; | |
240 } else { | |
241 real_to_path = real_to_path.DirName(); | |
242 if (!real_to_path.StartsWithExtendedPathPrefix() && | |
243 !AbsolutePath(&real_to_path)) | |
244 return false; | |
245 } | |
246 FilePath real_from_path = from_path; | |
247 if (!real_from_path.StartsWithExtendedPathPrefix() && | |
248 !AbsolutePath(&real_from_path)) | |
249 return false; | |
250 if (real_to_path.value().size() >= real_from_path.value().size() && | |
251 real_to_path.value().compare(0, real_from_path.value().size(), | |
252 real_from_path.value()) == 0) | |
253 return false; | |
michaeln
2010/12/17 02:32:03
I think these up front tests could be simplified..
Kavita Kanetkar
2010/12/23 03:14:28
The helper is only for strict parent/child. It won
| |
274 | 254 |
255 bool success = true; | |
256 FileEnumerator::FILE_TYPE traverse_type = | |
257 static_cast<FileEnumerator::FILE_TYPE>(FileEnumerator::FILES); | |
michaeln
2010/12/17 02:32:03
Are these static_casts needed?
Kavita Kanetkar
2010/12/23 03:14:28
Yes
On 2010/12/17 02:32:03, michaeln wrote:
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275 if (recursive) | 258 if (recursive) |
276 return ShellCopy(from_path, to_path, true); | 259 traverse_type = static_cast<FileEnumerator::FILE_TYPE>( |
277 | 260 traverse_type | FileEnumerator::DIRECTORIES); |
278 // The following code assumes that from path is a directory. | 261 FileEnumerator traversal(from_path, recursive, traverse_type); |
michaeln
2010/12/17 02:32:03
It would be nice to instance this enumerator close
Kavita Kanetkar
2010/12/23 03:14:28
Done.
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279 DCHECK(DirectoryExists(from_path)); | 262 FilePath current = from_path; |
michaeln
2010/12/17 02:32:03
Why is 'real_from_path' not used here?
| |
280 | 263 if (!PathExists(from_path)) { |
michaeln
2010/12/17 02:32:03
Would be nice to move this 'are the inputs valid'
Kavita Kanetkar
2010/12/23 03:14:28
Done.
| |
281 // Instead of creating a new directory, we copy the old one to include the | 264 LOG(ERROR) << "CopyDirectory() couldn't get info on source directory: " |
282 // security information of the folder as part of the copy. | 265 << from_path.value(); |
283 if (!PathExists(to_path)) { | 266 return false; |
284 // Except that Vista fails to do that, and instead do a recursive copy if | |
285 // the target directory doesn't exist. | |
286 if (base::win::GetVersion() >= base::win::VERSION_VISTA) | |
287 CreateDirectory(to_path); | |
288 else | |
289 ShellCopy(from_path, to_path, false); | |
290 } | 267 } |
291 | 268 |
292 FilePath directory = from_path.Append(L"*.*"); | 269 FilePath from_path_base = from_path; |
293 return ShellCopy(directory, to_path, false); | 270 if (recursive && DirectoryExists(to_path)) { |
271 // If the destination already exists and is a directory, then the | |
272 // top level of source needs to be copied. | |
273 from_path_base = from_path.DirName(); | |
274 } | |
275 | |
276 // This matches previous shell implementation that assumed that | |
277 // non-recursive calls will always have a directory for from_path. | |
278 DCHECK(recursive || DirectoryExists(from_path)); | |
279 | |
280 while (success && !current.empty()) { | |
281 // current is the source path, including from_path, so paste | |
282 // the suffix after from_path onto to_path to create the target_path. | |
283 FilePath::StringType suffix( | |
284 ¤t.value().c_str()[from_path_base.value().size()]); | |
285 | |
286 // Strip the leading '\' (if any). | |
287 if (!suffix.empty()) { | |
michaeln
2010/12/17 02:32:03
Would 'relative_path' be a better name? Is this ev
Kavita Kanetkar
2010/12/23 03:14:28
Done.
| |
288 DCHECK_EQ('\\', suffix[0]); | |
289 suffix.erase(0, 1); | |
290 } | |
291 const FilePath target_path = to_path.Append(suffix); | |
292 | |
293 if (DirectoryExists(current)) { | |
michaeln
2010/12/17 02:32:03
Could this system call be avoided by using the fil
Kavita Kanetkar
2010/12/23 03:14:28
Done.
| |
294 if (::CreateDirectory(target_path.value().c_str(), NULL) == 0) { | |
295 if (!DirectoryExists(target_path)) { | |
296 LOG(ERROR) << "CopyDirectory() couldn't create directory: " | |
297 << target_path.value(); | |
298 success = false; | |
299 } | |
300 } | |
301 } else { | |
302 if (!CopyFile(current, target_path)) { | |
303 LOG(ERROR) << "CopyDirectory() couldn't create file: " | |
304 << target_path.value(); | |
305 success = false; | |
306 } | |
307 } | |
308 current = traversal.Next(); | |
309 } | |
310 return success; | |
294 } | 311 } |
295 | 312 |
296 bool CopyAndDeleteDirectory(const FilePath& from_path, | 313 bool CopyAndDeleteDirectory(const FilePath& from_path, |
297 const FilePath& to_path) { | 314 const FilePath& to_path) { |
298 base::ThreadRestrictions::AssertIOAllowed(); | 315 base::ThreadRestrictions::AssertIOAllowed(); |
299 if (CopyDirectory(from_path, to_path, true)) { | 316 if (CopyDirectory(from_path, to_path, true)) { |
300 if (Delete(from_path, true)) { | 317 if (Delete(from_path, true)) { |
301 return true; | 318 return true; |
302 } | 319 } |
303 // Like Move, this function is not transactional, so we just | 320 // Like Move, this function is not transactional, so we just |
304 // leave the copied bits behind if deleting from_path fails. | 321 // leave the copied bits behind if deleting from_path fails. |
305 // If to_path exists previously then we have already overwritten | 322 // If to_path exists previously then we have already overwritten |
306 // it by now, we don't get better off by deleting the new bits. | 323 // it by now, we don't get better off by deleting the new bits. |
307 } | 324 } |
308 return false; | 325 return false; |
309 } | 326 } |
310 | 327 |
311 | |
312 bool PathExists(const FilePath& path) { | 328 bool PathExists(const FilePath& path) { |
313 base::ThreadRestrictions::AssertIOAllowed(); | 329 base::ThreadRestrictions::AssertIOAllowed(); |
314 return (GetFileAttributes(path.value().c_str()) != INVALID_FILE_ATTRIBUTES); | 330 return (GetFileAttributes(path.value().c_str()) != INVALID_FILE_ATTRIBUTES); |
315 } | 331 } |
316 | 332 |
317 bool PathIsWritable(const FilePath& path) { | 333 bool PathIsWritable(const FilePath& path) { |
318 base::ThreadRestrictions::AssertIOAllowed(); | 334 base::ThreadRestrictions::AssertIOAllowed(); |
319 HANDLE dir = | 335 HANDLE dir = |
320 CreateFile(path.value().c_str(), FILE_ADD_FILE, kFileShareAll, | 336 CreateFile(path.value().c_str(), FILE_ADD_FILE, kFileShareAll, |
321 NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL); | 337 NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL); |
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1125 uint8 unused = *(touch + offset); | 1141 uint8 unused = *(touch + offset); |
1126 offset += step_size; | 1142 offset += step_size; |
1127 } | 1143 } |
1128 FreeLibrary(dll_module); | 1144 FreeLibrary(dll_module); |
1129 } | 1145 } |
1130 | 1146 |
1131 return true; | 1147 return true; |
1132 } | 1148 } |
1133 | 1149 |
1134 } // namespace file_util | 1150 } // namespace file_util |
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