henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 1 | /* |
| 2 | * libjingle |
| 3 | * Copyright 2004--2006, Google Inc. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions are met: |
| 7 | * |
| 8 | * 1. Redistributions of source code must retain the above copyright notice, |
| 9 | * this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| 11 | * this list of conditions and the following disclaimer in the documentation |
| 12 | * and/or other materials provided with the distribution. |
| 13 | * 3. The name of the author may not be used to endorse or promote products |
| 14 | * derived from this software without specific prior written permission. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 18 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
| 19 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 20 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 21 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| 22 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 23 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| 24 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| 25 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 26 | */ |
| 27 | |
| 28 | #include "talk/base/win32filesystem.h" |
| 29 | |
| 30 | #include "talk/base/win32.h" |
| 31 | #include <shellapi.h> |
| 32 | #include <shlobj.h> |
| 33 | #include <tchar.h> |
| 34 | |
| 35 | #include "talk/base/fileutils.h" |
| 36 | #include "talk/base/pathutils.h" |
| 37 | #include "talk/base/scoped_ptr.h" |
| 38 | #include "talk/base/stream.h" |
| 39 | #include "talk/base/stringutils.h" |
| 40 | |
| 41 | // In several places in this file, we test the integrity level of the process |
| 42 | // before calling GetLongPathName. We do this because calling GetLongPathName |
| 43 | // when running under protected mode IE (a low integrity process) can result in |
| 44 | // a virtualized path being returned, which is wrong if you only plan to read. |
| 45 | // TODO: Waiting to hear back from IE team on whether this is the |
| 46 | // best approach; IEIsProtectedModeProcess is another possible solution. |
| 47 | |
| 48 | namespace talk_base { |
| 49 | |
| 50 | bool Win32Filesystem::CreateFolder(const Pathname &pathname) { |
| 51 | if (pathname.pathname().empty() || !pathname.filename().empty()) |
| 52 | return false; |
| 53 | |
| 54 | std::wstring path16; |
| 55 | if (!Utf8ToWindowsFilename(pathname.pathname(), &path16)) |
| 56 | return false; |
| 57 | |
| 58 | DWORD res = ::GetFileAttributes(path16.c_str()); |
| 59 | if (res != INVALID_FILE_ATTRIBUTES) { |
| 60 | // Something exists at this location, check if it is a directory |
| 61 | return ((res & FILE_ATTRIBUTE_DIRECTORY) != 0); |
| 62 | } else if ((GetLastError() != ERROR_FILE_NOT_FOUND) |
| 63 | && (GetLastError() != ERROR_PATH_NOT_FOUND)) { |
| 64 | // Unexpected error |
| 65 | return false; |
| 66 | } |
| 67 | |
| 68 | // Directory doesn't exist, look up one directory level |
| 69 | if (!pathname.parent_folder().empty()) { |
| 70 | Pathname parent(pathname); |
| 71 | parent.SetFolder(pathname.parent_folder()); |
| 72 | if (!CreateFolder(parent)) { |
| 73 | return false; |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | return (::CreateDirectory(path16.c_str(), NULL) != 0); |
| 78 | } |
| 79 | |
| 80 | FileStream *Win32Filesystem::OpenFile(const Pathname &filename, |
| 81 | const std::string &mode) { |
| 82 | FileStream *fs = new FileStream(); |
| 83 | if (fs && !fs->Open(filename.pathname().c_str(), mode.c_str(), NULL)) { |
| 84 | delete fs; |
| 85 | fs = NULL; |
| 86 | } |
| 87 | return fs; |
| 88 | } |
| 89 | |
| 90 | bool Win32Filesystem::CreatePrivateFile(const Pathname &filename) { |
| 91 | // To make the file private to the current user, we first must construct a |
| 92 | // SECURITY_DESCRIPTOR specifying an ACL. This code is mostly based upon |
| 93 | // http://msdn.microsoft.com/en-us/library/ms707085%28VS.85%29.aspx |
| 94 | |
| 95 | // Get the current process token. |
| 96 | HANDLE process_token = INVALID_HANDLE_VALUE; |
| 97 | if (!::OpenProcessToken(::GetCurrentProcess(), |
| 98 | TOKEN_QUERY, |
| 99 | &process_token)) { |
| 100 | LOG_ERR(LS_ERROR) << "OpenProcessToken() failed"; |
| 101 | return false; |
| 102 | } |
| 103 | |
| 104 | // Get the size of its TOKEN_USER structure. Return value is not checked |
| 105 | // because we expect it to fail. |
| 106 | DWORD token_user_size = 0; |
| 107 | (void)::GetTokenInformation(process_token, |
| 108 | TokenUser, |
| 109 | NULL, |
| 110 | 0, |
| 111 | &token_user_size); |
| 112 | |
| 113 | // Get the TOKEN_USER structure. |
wu@webrtc.org | 5c9dd59 | 2013-10-25 21:18:33 +0000 | [diff] [blame] | 114 | scoped_ptr<char[]> token_user_bytes(new char[token_user_size]); |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 115 | PTOKEN_USER token_user = reinterpret_cast<PTOKEN_USER>( |
| 116 | token_user_bytes.get()); |
| 117 | memset(token_user, 0, token_user_size); |
| 118 | BOOL success = ::GetTokenInformation(process_token, |
| 119 | TokenUser, |
| 120 | token_user, |
| 121 | token_user_size, |
| 122 | &token_user_size); |
| 123 | // We're now done with this. |
| 124 | ::CloseHandle(process_token); |
| 125 | if (!success) { |
| 126 | LOG_ERR(LS_ERROR) << "GetTokenInformation() failed"; |
| 127 | return false; |
| 128 | } |
| 129 | |
| 130 | if (!IsValidSid(token_user->User.Sid)) { |
| 131 | LOG_ERR(LS_ERROR) << "Current process has invalid user SID"; |
| 132 | return false; |
| 133 | } |
| 134 | |
| 135 | // Compute size needed for an ACL that allows access to just this user. |
| 136 | int acl_size = sizeof(ACL) + sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD) + |
| 137 | GetLengthSid(token_user->User.Sid); |
| 138 | |
| 139 | // Allocate it. |
wu@webrtc.org | 5c9dd59 | 2013-10-25 21:18:33 +0000 | [diff] [blame] | 140 | scoped_ptr<char[]> acl_bytes(new char[acl_size]); |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 141 | PACL acl = reinterpret_cast<PACL>(acl_bytes.get()); |
| 142 | memset(acl, 0, acl_size); |
| 143 | if (!::InitializeAcl(acl, acl_size, ACL_REVISION)) { |
| 144 | LOG_ERR(LS_ERROR) << "InitializeAcl() failed"; |
| 145 | return false; |
| 146 | } |
| 147 | |
| 148 | // Allow access to only the current user. |
| 149 | if (!::AddAccessAllowedAce(acl, |
| 150 | ACL_REVISION, |
| 151 | GENERIC_READ | GENERIC_WRITE | STANDARD_RIGHTS_ALL, |
| 152 | token_user->User.Sid)) { |
| 153 | LOG_ERR(LS_ERROR) << "AddAccessAllowedAce() failed"; |
| 154 | return false; |
| 155 | } |
| 156 | |
| 157 | // Now make the security descriptor. |
| 158 | SECURITY_DESCRIPTOR security_descriptor; |
| 159 | if (!::InitializeSecurityDescriptor(&security_descriptor, |
| 160 | SECURITY_DESCRIPTOR_REVISION)) { |
| 161 | LOG_ERR(LS_ERROR) << "InitializeSecurityDescriptor() failed"; |
| 162 | return false; |
| 163 | } |
| 164 | |
| 165 | // Put the ACL in it. |
| 166 | if (!::SetSecurityDescriptorDacl(&security_descriptor, |
| 167 | TRUE, |
| 168 | acl, |
| 169 | FALSE)) { |
| 170 | LOG_ERR(LS_ERROR) << "SetSecurityDescriptorDacl() failed"; |
| 171 | return false; |
| 172 | } |
| 173 | |
| 174 | // Finally create the file. |
| 175 | SECURITY_ATTRIBUTES security_attributes; |
| 176 | security_attributes.nLength = sizeof(security_attributes); |
| 177 | security_attributes.lpSecurityDescriptor = &security_descriptor; |
| 178 | security_attributes.bInheritHandle = FALSE; |
| 179 | HANDLE handle = ::CreateFile( |
| 180 | ToUtf16(filename.pathname()).c_str(), |
| 181 | GENERIC_READ | GENERIC_WRITE, |
| 182 | FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE, |
| 183 | &security_attributes, |
| 184 | CREATE_NEW, |
| 185 | 0, |
| 186 | NULL); |
| 187 | if (INVALID_HANDLE_VALUE == handle) { |
| 188 | LOG_ERR(LS_ERROR) << "CreateFile() failed"; |
| 189 | return false; |
| 190 | } |
| 191 | if (!::CloseHandle(handle)) { |
| 192 | LOG_ERR(LS_ERROR) << "CloseFile() failed"; |
| 193 | // Continue. |
| 194 | } |
| 195 | return true; |
| 196 | } |
| 197 | |
| 198 | bool Win32Filesystem::DeleteFile(const Pathname &filename) { |
| 199 | LOG(LS_INFO) << "Deleting file " << filename.pathname(); |
| 200 | if (!IsFile(filename)) { |
| 201 | ASSERT(IsFile(filename)); |
| 202 | return false; |
| 203 | } |
| 204 | return ::DeleteFile(ToUtf16(filename.pathname()).c_str()) != 0; |
| 205 | } |
| 206 | |
| 207 | bool Win32Filesystem::DeleteEmptyFolder(const Pathname &folder) { |
| 208 | LOG(LS_INFO) << "Deleting folder " << folder.pathname(); |
| 209 | |
| 210 | std::string no_slash(folder.pathname(), 0, folder.pathname().length()-1); |
| 211 | return ::RemoveDirectory(ToUtf16(no_slash).c_str()) != 0; |
| 212 | } |
| 213 | |
| 214 | bool Win32Filesystem::GetTemporaryFolder(Pathname &pathname, bool create, |
| 215 | const std::string *append) { |
| 216 | wchar_t buffer[MAX_PATH + 1]; |
| 217 | if (!::GetTempPath(ARRAY_SIZE(buffer), buffer)) |
| 218 | return false; |
| 219 | if (!IsCurrentProcessLowIntegrity() && |
| 220 | !::GetLongPathName(buffer, buffer, ARRAY_SIZE(buffer))) |
| 221 | return false; |
| 222 | size_t len = strlen(buffer); |
| 223 | if ((len > 0) && (buffer[len-1] != '\\')) { |
| 224 | len += strcpyn(buffer + len, ARRAY_SIZE(buffer) - len, L"\\"); |
| 225 | } |
| 226 | if (len >= ARRAY_SIZE(buffer) - 1) |
| 227 | return false; |
| 228 | pathname.clear(); |
| 229 | pathname.SetFolder(ToUtf8(buffer)); |
| 230 | if (append != NULL) { |
| 231 | ASSERT(!append->empty()); |
| 232 | pathname.AppendFolder(*append); |
| 233 | } |
| 234 | return !create || CreateFolder(pathname); |
| 235 | } |
| 236 | |
| 237 | std::string Win32Filesystem::TempFilename(const Pathname &dir, |
| 238 | const std::string &prefix) { |
| 239 | wchar_t filename[MAX_PATH]; |
| 240 | if (::GetTempFileName(ToUtf16(dir.pathname()).c_str(), |
| 241 | ToUtf16(prefix).c_str(), 0, filename) != 0) |
| 242 | return ToUtf8(filename); |
| 243 | ASSERT(false); |
| 244 | return ""; |
| 245 | } |
| 246 | |
| 247 | bool Win32Filesystem::MoveFile(const Pathname &old_path, |
| 248 | const Pathname &new_path) { |
| 249 | if (!IsFile(old_path)) { |
| 250 | ASSERT(IsFile(old_path)); |
| 251 | return false; |
| 252 | } |
| 253 | LOG(LS_INFO) << "Moving " << old_path.pathname() |
| 254 | << " to " << new_path.pathname(); |
| 255 | return ::MoveFile(ToUtf16(old_path.pathname()).c_str(), |
| 256 | ToUtf16(new_path.pathname()).c_str()) != 0; |
| 257 | } |
| 258 | |
| 259 | bool Win32Filesystem::MoveFolder(const Pathname &old_path, |
| 260 | const Pathname &new_path) { |
| 261 | if (!IsFolder(old_path)) { |
| 262 | ASSERT(IsFolder(old_path)); |
| 263 | return false; |
| 264 | } |
| 265 | LOG(LS_INFO) << "Moving " << old_path.pathname() |
| 266 | << " to " << new_path.pathname(); |
| 267 | if (::MoveFile(ToUtf16(old_path.pathname()).c_str(), |
| 268 | ToUtf16(new_path.pathname()).c_str()) == 0) { |
| 269 | if (::GetLastError() != ERROR_NOT_SAME_DEVICE) { |
| 270 | LOG_GLE(LS_ERROR) << "Failed to move file"; |
| 271 | return false; |
| 272 | } |
| 273 | if (!CopyFolder(old_path, new_path)) |
| 274 | return false; |
| 275 | if (!DeleteFolderAndContents(old_path)) |
| 276 | return false; |
| 277 | } |
| 278 | return true; |
| 279 | } |
| 280 | |
| 281 | bool Win32Filesystem::IsFolder(const Pathname &path) { |
| 282 | WIN32_FILE_ATTRIBUTE_DATA data = {0}; |
| 283 | if (0 == ::GetFileAttributesEx(ToUtf16(path.pathname()).c_str(), |
| 284 | GetFileExInfoStandard, &data)) |
| 285 | return false; |
| 286 | return (data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == |
| 287 | FILE_ATTRIBUTE_DIRECTORY; |
| 288 | } |
| 289 | |
| 290 | bool Win32Filesystem::IsFile(const Pathname &path) { |
| 291 | WIN32_FILE_ATTRIBUTE_DATA data = {0}; |
| 292 | if (0 == ::GetFileAttributesEx(ToUtf16(path.pathname()).c_str(), |
| 293 | GetFileExInfoStandard, &data)) |
| 294 | return false; |
| 295 | return (data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == 0; |
| 296 | } |
| 297 | |
| 298 | bool Win32Filesystem::IsAbsent(const Pathname& path) { |
| 299 | WIN32_FILE_ATTRIBUTE_DATA data = {0}; |
| 300 | if (0 != ::GetFileAttributesEx(ToUtf16(path.pathname()).c_str(), |
| 301 | GetFileExInfoStandard, &data)) |
| 302 | return false; |
| 303 | DWORD err = ::GetLastError(); |
| 304 | return (ERROR_FILE_NOT_FOUND == err || ERROR_PATH_NOT_FOUND == err); |
| 305 | } |
| 306 | |
| 307 | bool Win32Filesystem::CopyFile(const Pathname &old_path, |
| 308 | const Pathname &new_path) { |
| 309 | return ::CopyFile(ToUtf16(old_path.pathname()).c_str(), |
| 310 | ToUtf16(new_path.pathname()).c_str(), TRUE) != 0; |
| 311 | } |
| 312 | |
| 313 | bool Win32Filesystem::IsTemporaryPath(const Pathname& pathname) { |
| 314 | TCHAR buffer[MAX_PATH + 1]; |
| 315 | if (!::GetTempPath(ARRAY_SIZE(buffer), buffer)) |
| 316 | return false; |
| 317 | if (!IsCurrentProcessLowIntegrity() && |
| 318 | !::GetLongPathName(buffer, buffer, ARRAY_SIZE(buffer))) |
| 319 | return false; |
| 320 | return (::strnicmp(ToUtf16(pathname.pathname()).c_str(), |
| 321 | buffer, strlen(buffer)) == 0); |
| 322 | } |
| 323 | |
| 324 | bool Win32Filesystem::GetFileSize(const Pathname &pathname, size_t *size) { |
| 325 | WIN32_FILE_ATTRIBUTE_DATA data = {0}; |
| 326 | if (::GetFileAttributesEx(ToUtf16(pathname.pathname()).c_str(), |
| 327 | GetFileExInfoStandard, &data) == 0) |
| 328 | return false; |
| 329 | *size = data.nFileSizeLow; |
| 330 | return true; |
| 331 | } |
| 332 | |
| 333 | bool Win32Filesystem::GetFileTime(const Pathname& path, FileTimeType which, |
| 334 | time_t* time) { |
| 335 | WIN32_FILE_ATTRIBUTE_DATA data = {0}; |
| 336 | if (::GetFileAttributesEx(ToUtf16(path.pathname()).c_str(), |
| 337 | GetFileExInfoStandard, &data) == 0) |
| 338 | return false; |
| 339 | switch (which) { |
| 340 | case FTT_CREATED: |
| 341 | FileTimeToUnixTime(data.ftCreationTime, time); |
| 342 | break; |
| 343 | case FTT_MODIFIED: |
| 344 | FileTimeToUnixTime(data.ftLastWriteTime, time); |
| 345 | break; |
| 346 | case FTT_ACCESSED: |
| 347 | FileTimeToUnixTime(data.ftLastAccessTime, time); |
| 348 | break; |
| 349 | default: |
| 350 | return false; |
| 351 | } |
| 352 | return true; |
| 353 | } |
| 354 | |
| 355 | bool Win32Filesystem::GetAppPathname(Pathname* path) { |
| 356 | TCHAR buffer[MAX_PATH + 1]; |
| 357 | if (0 == ::GetModuleFileName(NULL, buffer, ARRAY_SIZE(buffer))) |
| 358 | return false; |
| 359 | path->SetPathname(ToUtf8(buffer)); |
| 360 | return true; |
| 361 | } |
| 362 | |
| 363 | bool Win32Filesystem::GetAppDataFolder(Pathname* path, bool per_user) { |
| 364 | ASSERT(!organization_name_.empty()); |
| 365 | ASSERT(!application_name_.empty()); |
| 366 | TCHAR buffer[MAX_PATH + 1]; |
| 367 | int csidl = per_user ? CSIDL_LOCAL_APPDATA : CSIDL_COMMON_APPDATA; |
| 368 | if (!::SHGetSpecialFolderPath(NULL, buffer, csidl, TRUE)) |
| 369 | return false; |
| 370 | if (!IsCurrentProcessLowIntegrity() && |
| 371 | !::GetLongPathName(buffer, buffer, ARRAY_SIZE(buffer))) |
| 372 | return false; |
| 373 | size_t len = strcatn(buffer, ARRAY_SIZE(buffer), __T("\\")); |
| 374 | len += strcpyn(buffer + len, ARRAY_SIZE(buffer) - len, |
| 375 | ToUtf16(organization_name_).c_str()); |
| 376 | if ((len > 0) && (buffer[len-1] != __T('\\'))) { |
| 377 | len += strcpyn(buffer + len, ARRAY_SIZE(buffer) - len, __T("\\")); |
| 378 | } |
| 379 | len += strcpyn(buffer + len, ARRAY_SIZE(buffer) - len, |
| 380 | ToUtf16(application_name_).c_str()); |
| 381 | if ((len > 0) && (buffer[len-1] != __T('\\'))) { |
| 382 | len += strcpyn(buffer + len, ARRAY_SIZE(buffer) - len, __T("\\")); |
| 383 | } |
| 384 | if (len >= ARRAY_SIZE(buffer) - 1) |
| 385 | return false; |
| 386 | path->clear(); |
| 387 | path->SetFolder(ToUtf8(buffer)); |
| 388 | return CreateFolder(*path); |
| 389 | } |
| 390 | |
| 391 | bool Win32Filesystem::GetAppTempFolder(Pathname* path) { |
| 392 | if (!GetAppPathname(path)) |
| 393 | return false; |
| 394 | std::string filename(path->filename()); |
| 395 | return GetTemporaryFolder(*path, true, &filename); |
| 396 | } |
| 397 | |
| 398 | bool Win32Filesystem::GetDiskFreeSpace(const Pathname& path, int64 *freebytes) { |
| 399 | if (!freebytes) { |
| 400 | return false; |
| 401 | } |
| 402 | char drive[4]; |
| 403 | std::wstring drive16; |
| 404 | const wchar_t* target_drive = NULL; |
| 405 | if (path.GetDrive(drive, sizeof(drive))) { |
| 406 | drive16 = ToUtf16(drive); |
| 407 | target_drive = drive16.c_str(); |
| 408 | } else if (path.folder().substr(0, 2) == "\\\\") { |
| 409 | // UNC path, fail. |
| 410 | // TODO: Handle UNC paths. |
| 411 | return false; |
| 412 | } else { |
| 413 | // The path is probably relative. GetDriveType and GetDiskFreeSpaceEx |
| 414 | // use the current drive if NULL is passed as the drive name. |
| 415 | // TODO: Add method to Pathname to determine if the path is relative. |
| 416 | // TODO: Add method to Pathname to convert a path to absolute. |
| 417 | } |
| 418 | UINT driveType = ::GetDriveType(target_drive); |
| 419 | if ( (driveType & DRIVE_REMOTE) || (driveType & DRIVE_UNKNOWN) ) { |
| 420 | LOG(LS_VERBOSE) << " remove or unknown drive " << drive; |
| 421 | return false; |
| 422 | } |
| 423 | |
| 424 | int64 totalNumberOfBytes; // receives the number of bytes on disk |
| 425 | int64 totalNumberOfFreeBytes; // receives the free bytes on disk |
| 426 | // make sure things won't change in 64 bit machine |
| 427 | // TODO replace with compile time assert |
| 428 | ASSERT(sizeof(ULARGE_INTEGER) == sizeof(uint64)); //NOLINT |
| 429 | if (::GetDiskFreeSpaceEx(target_drive, |
| 430 | (PULARGE_INTEGER)freebytes, |
| 431 | (PULARGE_INTEGER)&totalNumberOfBytes, |
| 432 | (PULARGE_INTEGER)&totalNumberOfFreeBytes)) { |
| 433 | return true; |
| 434 | } else { |
| 435 | LOG(LS_VERBOSE) << " GetDiskFreeSpaceEx returns error "; |
| 436 | return false; |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | Pathname Win32Filesystem::GetCurrentDirectory() { |
| 441 | Pathname cwd; |
| 442 | int path_len = 0; |
wu@webrtc.org | 5c9dd59 | 2013-10-25 21:18:33 +0000 | [diff] [blame] | 443 | scoped_ptr<wchar_t[]> path; |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 444 | do { |
| 445 | int needed = ::GetCurrentDirectory(path_len, path.get()); |
| 446 | if (needed == 0) { |
| 447 | // Error. |
| 448 | LOG_GLE(LS_ERROR) << "::GetCurrentDirectory() failed"; |
| 449 | return cwd; // returns empty pathname |
| 450 | } |
| 451 | if (needed <= path_len) { |
| 452 | // It wrote successfully. |
| 453 | break; |
| 454 | } |
| 455 | // Else need to re-alloc for "needed". |
| 456 | path.reset(new wchar_t[needed]); |
| 457 | path_len = needed; |
| 458 | } while (true); |
| 459 | cwd.SetFolder(ToUtf8(path.get())); |
| 460 | return cwd; |
| 461 | } |
| 462 | |
| 463 | // TODO: Consider overriding DeleteFolderAndContents for speed and potentially |
| 464 | // better OS integration (recycle bin?) |
| 465 | /* |
| 466 | std::wstring temp_path16 = ToUtf16(temp_path.pathname()); |
| 467 | temp_path16.append(1, '*'); |
| 468 | temp_path16.append(1, '\0'); |
| 469 | |
| 470 | SHFILEOPSTRUCT file_op = { 0 }; |
| 471 | file_op.wFunc = FO_DELETE; |
| 472 | file_op.pFrom = temp_path16.c_str(); |
| 473 | file_op.fFlags = FOF_NOCONFIRMATION | FOF_NOERRORUI | FOF_SILENT; |
| 474 | return (0 == SHFileOperation(&file_op)); |
| 475 | */ |
| 476 | |
| 477 | } // namespace talk_base |