file_util_win.cc revision 5821806d5e7f356e8fa4b058a389a808ea183019
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/file_util.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <windows.h> 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <psapi.h> 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <shellapi.h> 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <shlobj.h> 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <time.h> 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <limits> 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <string> 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/file_path.h" 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/logging.h" 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/metrics/histogram.h" 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/process_util.h" 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/string_number_conversions.h" 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/string_util.h" 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/threading/thread_restrictions.h" 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/time.h" 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/utf_string_conversions.h" 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/win/scoped_handle.h" 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/win/windows_version.h" 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace file_util { 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace { 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const DWORD kFileShareAll = 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE; 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool AbsolutePath(FilePath* path) { 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) wchar_t file_path_buf[MAX_PATH]; 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!_wfullpath(file_path_buf, path->value().c_str(), MAX_PATH)) 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *path = FilePath(file_path_buf); 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int CountFilesCreatedAfter(const FilePath& path, 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const base::Time& comparison_time) { 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int file_count = 0; 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FILETIME comparison_filetime(comparison_time.ToFileTime()); 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WIN32_FIND_DATA find_file_data; 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // All files in given dir 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::wstring filename_spec = path.Append(L"*").value(); 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) HANDLE find_handle = FindFirstFile(filename_spec.c_str(), &find_file_data); 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (find_handle != INVALID_HANDLE_VALUE) { 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) do { 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Don't count current or parent directories. 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if ((wcscmp(find_file_data.cFileName, L"..") == 0) || 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (wcscmp(find_file_data.cFileName, L".") == 0)) 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) continue; 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) long result = CompareFileTime(&find_file_data.ftCreationTime, // NOLINT 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) &comparison_filetime); 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // File was created after or on comparison time 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if ((result == 1) || (result == 0)) 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ++file_count; 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } while (FindNextFile(find_handle, &find_file_data)); 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FindClose(find_handle); 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return file_count; 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool Delete(const FilePath& path, bool recursive) { 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (path.value().length() >= MAX_PATH) 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!recursive) { 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // If not recursing, then first check to see if |path| is a directory. 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // If it is, then remove it with RemoveDirectory. 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::PlatformFileInfo file_info; 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (GetFileInfo(path, &file_info) && file_info.is_directory) 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return RemoveDirectory(path.value().c_str()) != 0; 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Otherwise, it's a file, wildcard or non-existant. Try DeleteFile first 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // because it should be faster. If DeleteFile fails, then we fall through 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // to SHFileOperation, which will do the right thing. 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (DeleteFile(path.value().c_str()) != 0) 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // SHFILEOPSTRUCT wants the path to be terminated with two NULLs, 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // so we have to use wcscpy because wcscpy_s writes non-NULLs 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // into the rest of the buffer. 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) wchar_t double_terminated_path[MAX_PATH + 1] = {0}; 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#pragma warning(suppress:4996) // don't complain about wcscpy deprecation 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (g_bug108724_debug) 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(WARNING) << "copying "; 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) wcscpy(double_terminated_path, path.value().c_str()); 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SHFILEOPSTRUCT file_operation = {0}; 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) file_operation.wFunc = FO_DELETE; 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) file_operation.pFrom = double_terminated_path; 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) file_operation.fFlags = FOF_NOERRORUI | FOF_SILENT | FOF_NOCONFIRMATION; 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!recursive) 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) file_operation.fFlags |= FOF_NORECURSION | FOF_FILESONLY; 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (g_bug108724_debug) 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(WARNING) << "Performing shell operation"; 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int err = SHFileOperation(&file_operation); 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (g_bug108724_debug) 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(WARNING) << "Done: " << err; 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Since we're passing flags to the operation telling it to be silent, 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // it's possible for the operation to be aborted/cancelled without err 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // being set (although MSDN doesn't give any scenarios for how this can 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // happen). See MSDN for SHFileOperation and SHFILEOPTSTRUCT. 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (file_operation.fAnyOperationsAborted) 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Some versions of Windows return ERROR_FILE_NOT_FOUND (0x2) when deleting 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // an empty directory and some return 0x402 when they should be returning 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // ERROR_FILE_NOT_FOUND. MSDN says Vista and up won't return 0x402. 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return (err == 0 || err == ERROR_FILE_NOT_FOUND || err == 0x402); 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool DeleteAfterReboot(const FilePath& path) { 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (path.value().length() >= MAX_PATH) 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return MoveFileEx(path.value().c_str(), NULL, 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MOVEFILE_DELAY_UNTIL_REBOOT | 1385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MOVEFILE_REPLACE_EXISTING) != FALSE; 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool Move(const FilePath& from_path, const FilePath& to_path) { 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // NOTE: I suspect we could support longer paths, but that would involve 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // analyzing all our usage of files. 1465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (from_path.value().length() >= MAX_PATH || 1475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) to_path.value().length() >= MAX_PATH) { 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 1495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (MoveFileEx(from_path.value().c_str(), to_path.value().c_str(), 1515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING) != 0) 1525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 1535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Keep the last error value from MoveFileEx around in case the below 1555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // fails. 1565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool ret = false; 1575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DWORD last_error = ::GetLastError(); 1585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (DirectoryExists(from_path)) { 1605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // MoveFileEx fails if moving directory across volumes. We will simulate 1615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the move by using Copy and Delete. Ideally we could check whether 1625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // from_path and to_path are indeed in different volumes. 1635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ret = CopyAndDeleteDirectory(from_path, to_path); 1645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!ret) { 1675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Leave a clue about what went wrong so that it can be (at least) picked 1685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // up by a PLOG entry. 1695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ::SetLastError(last_error); 1705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return ret; 1735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool ReplaceFile(const FilePath& from_path, const FilePath& to_path) { 1765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 1775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Try a simple move first. It will only succeed when |to_path| doesn't 1785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // already exist. 1795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (::MoveFile(from_path.value().c_str(), to_path.value().c_str())) 1805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 1815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Try the full-blown replace if the move fails, as ReplaceFile will only 1825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // succeed when |to_path| does exist. When writing to a network share, we may 1835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // not be able to change the ACLs. Ignore ACL errors then 1845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // (REPLACEFILE_IGNORE_MERGE_ERRORS). 1855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (::ReplaceFile(to_path.value().c_str(), from_path.value().c_str(), NULL, 1865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) REPLACEFILE_IGNORE_MERGE_ERRORS, NULL, NULL)) { 1875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 1885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 1905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool CopyFile(const FilePath& from_path, const FilePath& to_path) { 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 1945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // NOTE: I suspect we could support longer paths, but that would involve 1965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // analyzing all our usage of files. 1975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (from_path.value().length() >= MAX_PATH || 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) to_path.value().length() >= MAX_PATH) { 1995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 2005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return (::CopyFile(from_path.value().c_str(), to_path.value().c_str(), 2025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) false) != 0); 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool ShellCopy(const FilePath& from_path, const FilePath& to_path, 2065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool recursive) { 2075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 2085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // NOTE: I suspect we could support longer paths, but that would involve 2105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // analyzing all our usage of files. 2115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (from_path.value().length() >= MAX_PATH || 2125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) to_path.value().length() >= MAX_PATH) { 2135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 2145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // SHFILEOPSTRUCT wants the path to be terminated with two NULLs, 2175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // so we have to use wcscpy because wcscpy_s writes non-NULLs 2185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // into the rest of the buffer. 2195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) wchar_t double_terminated_path_from[MAX_PATH + 1] = {0}; 2205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) wchar_t double_terminated_path_to[MAX_PATH + 1] = {0}; 2215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#pragma warning(suppress:4996) // don't complain about wcscpy deprecation 2225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) wcscpy(double_terminated_path_from, from_path.value().c_str()); 2235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#pragma warning(suppress:4996) // don't complain about wcscpy deprecation 2245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) wcscpy(double_terminated_path_to, to_path.value().c_str()); 2255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SHFILEOPSTRUCT file_operation = {0}; 2275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) file_operation.wFunc = FO_COPY; 2285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) file_operation.pFrom = double_terminated_path_from; 2295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) file_operation.pTo = double_terminated_path_to; 2305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) file_operation.fFlags = FOF_NOERRORUI | FOF_SILENT | FOF_NOCONFIRMATION | 2315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FOF_NOCONFIRMMKDIR; 2325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!recursive) 2335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) file_operation.fFlags |= FOF_NORECURSION | FOF_FILESONLY; 2345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return (SHFileOperation(&file_operation) == 0); 2365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool CopyDirectory(const FilePath& from_path, const FilePath& to_path, 2395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool recursive) { 2405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 2415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (recursive) 2435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return ShellCopy(from_path, to_path, true); 2445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The following code assumes that from path is a directory. 2465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(DirectoryExists(from_path)); 2475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Instead of creating a new directory, we copy the old one to include the 2495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // security information of the folder as part of the copy. 2505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!PathExists(to_path)) { 2515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Except that Vista fails to do that, and instead do a recursive copy if 2525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the target directory doesn't exist. 2535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (base::win::GetVersion() >= base::win::VERSION_VISTA) 2545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CreateDirectory(to_path); 2555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) else 2565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ShellCopy(from_path, to_path, false); 2575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FilePath directory = from_path.Append(L"*.*"); 2605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return ShellCopy(directory, to_path, false); 2615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool CopyAndDeleteDirectory(const FilePath& from_path, 2645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const FilePath& to_path) { 2655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 2665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (CopyDirectory(from_path, to_path, true)) { 2675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (Delete(from_path, true)) { 2685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 2695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Like Move, this function is not transactional, so we just 2715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // leave the copied bits behind if deleting from_path fails. 2725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // If to_path exists previously then we have already overwritten 2735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // it by now, we don't get better off by deleting the new bits. 2745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 2765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool PathExists(const FilePath& path) { 2805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 2815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return (GetFileAttributes(path.value().c_str()) != INVALID_FILE_ATTRIBUTES); 2825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool PathIsWritable(const FilePath& path) { 2855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 2865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) HANDLE dir = 2875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CreateFile(path.value().c_str(), FILE_ADD_FILE, kFileShareAll, 2885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL); 2895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (dir == INVALID_HANDLE_VALUE) 2915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 2925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CloseHandle(dir); 2945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 2955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool DirectoryExists(const FilePath& path) { 2985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 2995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DWORD fileattr = GetFileAttributes(path.value().c_str()); 3005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (fileattr != INVALID_FILE_ATTRIBUTES) 3015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return (fileattr & FILE_ATTRIBUTE_DIRECTORY) != 0; 3025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 3035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool GetFileCreationLocalTimeFromHandle(HANDLE file_handle, 3065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LPSYSTEMTIME creation_time) { 3075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 3085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!file_handle) 3095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 3105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FILETIME utc_filetime; 3125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!GetFileTime(file_handle, &utc_filetime, NULL, NULL)) 3135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 3145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FILETIME local_filetime; 3165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!FileTimeToLocalFileTime(&utc_filetime, &local_filetime)) 3175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 3185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return !!FileTimeToSystemTime(&local_filetime, creation_time); 3205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool GetFileCreationLocalTime(const std::wstring& filename, 3235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LPSYSTEMTIME creation_time) { 3245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 3255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::win::ScopedHandle file_handle( 3265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CreateFile(filename.c_str(), GENERIC_READ, kFileShareAll, NULL, 3275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL)); 3285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return GetFileCreationLocalTimeFromHandle(file_handle.Get(), creation_time); 3295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool GetTempDir(FilePath* path) { 3325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 3335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) wchar_t temp_path[MAX_PATH + 1]; 3355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DWORD path_len = ::GetTempPath(MAX_PATH, temp_path); 3365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (path_len >= MAX_PATH || path_len <= 0) 3375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 3385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // TODO(evanm): the old behavior of this function was to always strip the 3395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // trailing slash. We duplicate this here, but it shouldn't be necessary 3405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // when everyone is using the appropriate FilePath APIs. 3415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *path = FilePath(temp_path).StripTrailingSeparators(); 3425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 3435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool GetShmemTempDir(FilePath* path, bool executable) { 3465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return GetTempDir(path); 3475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool CreateTemporaryFile(FilePath* path) { 3505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 3515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FilePath temp_file; 3535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!GetTempDir(path)) 3555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 3565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (CreateTemporaryFileInDir(*path, &temp_file)) { 3585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *path = temp_file; 3595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 3605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 3635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)FILE* CreateAndOpenTemporaryShmemFile(FilePath* path, bool executable) { 3665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 3675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return CreateAndOpenTemporaryFile(path); 3685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// On POSIX we have semantics to create and open a temporary file 3715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// atomically. 3725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// TODO(jrg): is there equivalent call to use on Windows instead of 3735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// going 2-step? 3745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)FILE* CreateAndOpenTemporaryFileInDir(const FilePath& dir, FilePath* path) { 3755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 3765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!CreateTemporaryFileInDir(dir, path)) { 3775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return NULL; 3785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Open file in binary mode, to avoid problems with fwrite. On Windows 3805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // it replaces \n's with \r\n's, which may surprise you. 3815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Reference: http://msdn.microsoft.com/en-us/library/h9t88zwz(VS.71).aspx 3825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return OpenFile(*path, "wb+"); 3835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool CreateTemporaryFileInDir(const FilePath& dir, 3865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FilePath* temp_file) { 3875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 3885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) wchar_t temp_name[MAX_PATH + 1]; 3905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!GetTempFileName(dir.value().c_str(), L"", 0, temp_name)) { 3925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DPLOG(WARNING) << "Failed to get temporary file name in " << dir.value(); 3935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 3945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DWORD path_len = GetLongPathName(temp_name, temp_name, MAX_PATH); 3975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (path_len > MAX_PATH + 1 || path_len == 0) { 3985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DPLOG(WARNING) << "Failed to get long path name for " << temp_name; 3995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 4005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::wstring temp_file_str; 4035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) temp_file_str.assign(temp_name, path_len); 4045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *temp_file = FilePath(temp_file_str); 4055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 4065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool CreateTemporaryDirInDir(const FilePath& base_dir, 4095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const FilePath::StringType& prefix, 4105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FilePath* new_dir) { 4115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 4125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FilePath path_to_create; 4145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) srand(static_cast<uint32>(time(NULL))); 4155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (int count = 0; count < 50; ++count) { 4175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Try create a new temporary directory with random generated name. If 4185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the one exists, keep trying another path name until we reach some limit. 4195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) string16 new_dir_name; 4205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) new_dir_name.assign(prefix); 4215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) new_dir_name.append(base::IntToString16(::base::GetCurrentProcId())); 4225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) new_dir_name.push_back('_'); 4235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) new_dir_name.append(base::IntToString16(rand() % kint16max)); 4245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) path_to_create = base_dir.Append(new_dir_name); 4265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (::CreateDirectory(path_to_create.value().c_str(), NULL)) { 4275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *new_dir = path_to_create; 4285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 4295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 4335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool CreateNewTempDirectory(const FilePath::StringType& prefix, 4365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FilePath* new_temp_path) { 4375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 4385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FilePath system_temp_dir; 4405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!GetTempDir(&system_temp_dir)) 4415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 4425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return CreateTemporaryDirInDir(system_temp_dir, prefix, new_temp_path); 4445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool CreateDirectory(const FilePath& full_path) { 4475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 4485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // If the path exists, we've succeeded if it's a directory, failed otherwise. 4505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const wchar_t* full_path_str = full_path.value().c_str(); 4515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DWORD fileattr = ::GetFileAttributes(full_path_str); 4525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (fileattr != INVALID_FILE_ATTRIBUTES) { 4535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if ((fileattr & FILE_ATTRIBUTE_DIRECTORY) != 0) { 4545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DVLOG(1) << "CreateDirectory(" << full_path_str << "), " 4555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << "directory already exists."; 4565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 4575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DLOG(WARNING) << "CreateDirectory(" << full_path_str << "), " 4595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << "conflicts with existing file."; 4605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 4615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Invariant: Path does not exist as file or directory. 4645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Attempt to create the parent recursively. This will immediately return 4665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // true if it already exists, otherwise will create all required parent 4675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // directories starting with the highest-level missing parent. 4685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FilePath parent_path(full_path.DirName()); 4695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (parent_path.value() == full_path.value()) { 4705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 4715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!CreateDirectory(parent_path)) { 4735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DLOG(WARNING) << "Failed to create one of the parent directories."; 4745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 4755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!::CreateDirectory(full_path_str, NULL)) { 4785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DWORD error_code = ::GetLastError(); 4795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (error_code == ERROR_ALREADY_EXISTS && DirectoryExists(full_path)) { 4805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // This error code ERROR_ALREADY_EXISTS doesn't indicate whether we 4815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // were racing with someone creating the same directory, or a file 4825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // with the same path. If DirectoryExists() returns true, we lost the 4835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // race to create the same directory. 4845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 4855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 4865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DLOG(WARNING) << "Failed to create directory " << full_path_str 4875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << ", last error is " << error_code << "."; 4885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 4895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 4915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 4925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// TODO(rkc): Work out if we want to handle NTFS junctions here or not, handle 4965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// them if we do decide to. 4975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool IsLink(const FilePath& file_path) { 4985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 4995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool GetFileInfo(const FilePath& file_path, base::PlatformFileInfo* results) { 5025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 5035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WIN32_FILE_ATTRIBUTE_DATA attr; 5055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!GetFileAttributesEx(file_path.value().c_str(), 5065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) GetFileExInfoStandard, &attr)) { 5075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 5085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ULARGE_INTEGER size; 5115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size.HighPart = attr.nFileSizeHigh; 5125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size.LowPart = attr.nFileSizeLow; 5135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) results->size = size.QuadPart; 5145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) results->is_directory = 5165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (attr.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0; 5175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) results->last_modified = base::Time::FromFileTime(attr.ftLastWriteTime); 5185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) results->last_accessed = base::Time::FromFileTime(attr.ftLastAccessTime); 5195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) results->creation_time = base::Time::FromFileTime(attr.ftCreationTime); 5205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 5225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)FILE* OpenFile(const FilePath& filename, const char* mode) { 5255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 5265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::wstring w_mode = ASCIIToWide(std::string(mode)); 5275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return _wfsopen(filename.value().c_str(), w_mode.c_str(), _SH_DENYNO); 5285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)FILE* OpenFile(const std::string& filename, const char* mode) { 5315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 5325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return _fsopen(filename.c_str(), mode, _SH_DENYNO); 5335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int ReadFile(const FilePath& filename, char* data, int size) { 5365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 5375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::win::ScopedHandle file(CreateFile(filename.value().c_str(), 5385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) GENERIC_READ, 5395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FILE_SHARE_READ | FILE_SHARE_WRITE, 5405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NULL, 5415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) OPEN_EXISTING, 5425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FILE_FLAG_SEQUENTIAL_SCAN, 5435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NULL)); 5445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!file) 5455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return -1; 5465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DWORD read; 5485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (::ReadFile(file, data, size, &read, NULL) && 5495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static_cast<int>(read) == size) 5505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return read; 5515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return -1; 5525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int WriteFile(const FilePath& filename, const char* data, int size) { 5555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 5565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::win::ScopedHandle file(CreateFile(filename.value().c_str(), 5575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) GENERIC_WRITE, 5585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 0, 5595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NULL, 5605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CREATE_ALWAYS, 5615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 0, 5625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NULL)); 5635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!file) { 5645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DLOG(WARNING) << "CreateFile failed for path " << filename.value() 5655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << " error code=" << GetLastError(); 5665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return -1; 5675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DWORD written; 5705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) BOOL result = ::WriteFile(file, data, size, &written, NULL); 5715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (result && static_cast<int>(written) == size) 5725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return written; 5735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!result) { 5755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // WriteFile failed. 5765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DLOG(WARNING) << "writing file " << filename.value() 5775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << " failed, error code=" << GetLastError(); 5785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 5795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Didn't write all the bytes. 5805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DLOG(WARNING) << "wrote" << written << " bytes to " 5815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << filename.value() << " expected " << size; 5825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return -1; 5845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int AppendToFile(const FilePath& filename, const char* data, int size) { 5875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 5885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::win::ScopedHandle file(CreateFile(filename.value().c_str(), 5895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FILE_APPEND_DATA, 5905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 0, 5915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NULL, 5925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) OPEN_EXISTING, 5935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 0, 5945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NULL)); 5955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!file) { 5965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DLOG(WARNING) << "CreateFile failed for path " << filename.value() 5975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << " error code=" << GetLastError(); 5985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return -1; 5995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DWORD written; 6025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) BOOL result = ::WriteFile(file, data, size, &written, NULL); 6035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (result && static_cast<int>(written) == size) 6045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return written; 6055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!result) { 6075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // WriteFile failed. 6085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DLOG(WARNING) << "writing file " << filename.value() 6095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << " failed, error code=" << GetLastError(); 6105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 6115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Didn't write all the bytes. 6125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DLOG(WARNING) << "wrote" << written << " bytes to " 6135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << filename.value() << " expected " << size; 6145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return -1; 6165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 6175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Gets the current working directory for the process. 6195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool GetCurrentDirectory(FilePath* dir) { 6205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 6215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) wchar_t system_buffer[MAX_PATH]; 6235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) system_buffer[0] = 0; 6245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DWORD len = ::GetCurrentDirectory(MAX_PATH, system_buffer); 6255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (len == 0 || len > MAX_PATH) 6265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 6275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // TODO(evanm): the old behavior of this function was to always strip the 6285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // trailing slash. We duplicate this here, but it shouldn't be necessary 6295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // when everyone is using the appropriate FilePath APIs. 6305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::wstring dir_str(system_buffer); 6315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *dir = FilePath(dir_str).StripTrailingSeparators(); 6325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 6335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 6345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Sets the current working directory for the process. 6365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool SetCurrentDirectory(const FilePath& directory) { 6375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 6385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) BOOL ret = ::SetCurrentDirectory(directory.value().c_str()); 6395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return ret != 0; 6405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 6415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/////////////////////////////////////////////// 6435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// FileEnumerator 6445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)FileEnumerator::FileEnumerator(const FilePath& root_path, 6465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool recursive, 6475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int file_type) 6485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : recursive_(recursive), 6495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) file_type_(file_type), 6505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) has_find_data_(false), 6515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) find_handle_(INVALID_HANDLE_VALUE) { 6525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // INCLUDE_DOT_DOT must not be specified if recursive. 6535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(!(recursive && (INCLUDE_DOT_DOT & file_type_))); 6545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memset(&find_data_, 0, sizeof(find_data_)); 6555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pending_paths_.push(root_path); 6565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 6575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)FileEnumerator::FileEnumerator(const FilePath& root_path, 6595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool recursive, 6605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int file_type, 6615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const FilePath::StringType& pattern) 6625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : recursive_(recursive), 6635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) file_type_(file_type), 6645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) has_find_data_(false), 6655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pattern_(pattern), 6665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) find_handle_(INVALID_HANDLE_VALUE) { 6675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // INCLUDE_DOT_DOT must not be specified if recursive. 6685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(!(recursive && (INCLUDE_DOT_DOT & file_type_))); 6695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memset(&find_data_, 0, sizeof(find_data_)); 6705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pending_paths_.push(root_path); 6715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 6725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)FileEnumerator::~FileEnumerator() { 6745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (find_handle_ != INVALID_HANDLE_VALUE) 6755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FindClose(find_handle_); 6765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 6775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void FileEnumerator::GetFindInfo(FindInfo* info) { 6795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(info); 6805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!has_find_data_) 6825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 6835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memcpy(info, &find_data_, sizeof(*info)); 6855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 6865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 6885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool FileEnumerator::IsDirectory(const FindInfo& info) { 6895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0; 6905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 6915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 6935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)FilePath FileEnumerator::GetFilename(const FindInfo& find_info) { 6945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return FilePath(find_info.cFileName); 6955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 6965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 6985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int64 FileEnumerator::GetFilesize(const FindInfo& find_info) { 6995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ULARGE_INTEGER size; 7005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size.HighPart = find_info.nFileSizeHigh; 7015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size.LowPart = find_info.nFileSizeLow; 7025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK_LE(size.QuadPart, std::numeric_limits<int64>::max()); 7035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return static_cast<int64>(size.QuadPart); 7045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 7055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 7075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)base::Time FileEnumerator::GetLastModifiedTime(const FindInfo& find_info) { 7085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::Time::FromFileTime(find_info.ftLastWriteTime); 7095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 7105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)FilePath FileEnumerator::Next() { 7125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 7135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) while (has_find_data_ || !pending_paths_.empty()) { 7155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!has_find_data_) { 7165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The last find FindFirstFile operation is done, prepare a new one. 7175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) root_path_ = pending_paths_.top(); 7185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pending_paths_.pop(); 7195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Start a new find operation. 7215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FilePath src = root_path_; 7225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (pattern_.empty()) 7245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) src = src.Append(L"*"); // No pattern = match everything. 7255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) else 7265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) src = src.Append(pattern_); 7275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) find_handle_ = FindFirstFile(src.value().c_str(), &find_data_); 7295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) has_find_data_ = true; 7305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 7315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Search for the next file/directory. 7325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!FindNextFile(find_handle_, &find_data_)) { 7335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FindClose(find_handle_); 7345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) find_handle_ = INVALID_HANDLE_VALUE; 7355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 7365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 7375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (INVALID_HANDLE_VALUE == find_handle_) { 7395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) has_find_data_ = false; 7405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // This is reached when we have finished a directory and are advancing to 7425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the next one in the queue. We applied the pattern (if any) to the files 7435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // in the root search directory, but for those directories which were 7445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // matched, we want to enumerate all files inside them. This will happen 7455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // when the handle is empty. 7465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pattern_ = FilePath::StringType(); 7475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) continue; 7495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 7505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FilePath cur_file(find_data_.cFileName); 7525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (ShouldSkip(cur_file)) 7535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) continue; 7545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Construct the absolute filename. 7565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cur_file = root_path_.Append(find_data_.cFileName); 7575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (find_data_.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) { 7595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (recursive_) { 7605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // If |cur_file| is a directory, and we are doing recursive searching, 7615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // add it to pending_paths_ so we scan it after we finish scanning this 7625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // directory. 7635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pending_paths_.push(cur_file); 7645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 7655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (file_type_ & FileEnumerator::DIRECTORIES) 7665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return cur_file; 7675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else if (file_type_ & FileEnumerator::FILES) { 7685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return cur_file; 7695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 7705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 7715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return FilePath(); 7735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 7745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/////////////////////////////////////////////// 7765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// MemoryMappedFile 7775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)MemoryMappedFile::MemoryMappedFile() 7795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : file_(INVALID_HANDLE_VALUE), 7805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) file_mapping_(INVALID_HANDLE_VALUE), 7815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) data_(NULL), 7825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) length_(INVALID_FILE_SIZE) { 7835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 7845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool MemoryMappedFile::InitializeAsImageSection(const FilePath& file_name) { 7865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (IsValid()) 7875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 7885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) file_ = base::CreatePlatformFile( 7895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) file_name, base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_READ, 7905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NULL, NULL); 7915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (file_ == base::kInvalidPlatformFileValue) { 7935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DLOG(ERROR) << "Couldn't open " << file_name.value(); 7945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 7955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 7965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!MapFileToMemoryInternalEx(SEC_IMAGE)) { 7985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CloseHandles(); 7995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 8005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 8015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 8035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 8045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool MemoryMappedFile::MapFileToMemoryInternal() { 8065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return MapFileToMemoryInternalEx(0); 8075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 8085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool MemoryMappedFile::MapFileToMemoryInternalEx(int flags) { 8105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 8115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (file_ == INVALID_HANDLE_VALUE) 8135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 8145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) length_ = ::GetFileSize(file_, NULL); 8165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (length_ == INVALID_FILE_SIZE) 8175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 8185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) file_mapping_ = ::CreateFileMapping(file_, NULL, PAGE_READONLY | flags, 8205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 0, 0, NULL); 8215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!file_mapping_) { 8225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // According to msdn, system error codes are only reserved up to 15999. 8235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // http://msdn.microsoft.com/en-us/library/ms681381(v=VS.85).aspx. 8245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) UMA_HISTOGRAM_ENUMERATION("MemoryMappedFile.CreateFileMapping", 8255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) logging::GetLastSystemErrorCode(), 16000); 8265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 8275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 8285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) data_ = static_cast<uint8*>( 8305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ::MapViewOfFile(file_mapping_, FILE_MAP_READ, 0, 0, 0)); 8315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!data_) { 8325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) UMA_HISTOGRAM_ENUMERATION("MemoryMappedFile.MapViewOfFile", 8335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) logging::GetLastSystemErrorCode(), 16000); 8345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 8355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return data_ != NULL; 8365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 8375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void MemoryMappedFile::CloseHandles() { 8395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (data_) 8405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ::UnmapViewOfFile(data_); 8415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (file_mapping_ != INVALID_HANDLE_VALUE) 8425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ::CloseHandle(file_mapping_); 8435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (file_ != INVALID_HANDLE_VALUE) 8445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ::CloseHandle(file_); 8455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) data_ = NULL; 8475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) file_mapping_ = file_ = INVALID_HANDLE_VALUE; 8485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) length_ = INVALID_FILE_SIZE; 8495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 8505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool HasFileBeenModifiedSince(const FileEnumerator::FindInfo& find_info, 8525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const base::Time& cutoff_time) { 8535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 8545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FILETIME file_time = cutoff_time.ToFileTime(); 8555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) long result = CompareFileTime(&find_info.ftLastWriteTime, // NOLINT 8565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) &file_time); 8575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return result == 1 || result == 0; 8585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 8595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool NormalizeFilePath(const FilePath& path, FilePath* real_path) { 8615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 8625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FilePath mapped_file; 8635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!NormalizeToNativeFilePath(path, &mapped_file)) 8645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 8655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // NormalizeToNativeFilePath() will return a path that starts with 8665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // "\Device\Harddisk...". Helper DevicePathToDriveLetterPath() 8675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // will find a drive letter which maps to the path's device, so 8685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // that we return a path starting with a drive letter. 8695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return DevicePathToDriveLetterPath(mapped_file, real_path); 8705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 8715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool DevicePathToDriveLetterPath(const FilePath& nt_device_path, 8735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FilePath* out_drive_letter_path) { 8745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 8755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Get the mapping of drive letters to device paths. 8775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int kDriveMappingSize = 1024; 8785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) wchar_t drive_mapping[kDriveMappingSize] = {'\0'}; 8795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!::GetLogicalDriveStrings(kDriveMappingSize - 1, drive_mapping)) { 8805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DLOG(ERROR) << "Failed to get drive mapping."; 8815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 8825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 8835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The drive mapping is a sequence of null terminated strings. 8855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The last string is empty. 8865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) wchar_t* drive_map_ptr = drive_mapping; 8875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) wchar_t device_path_as_string[MAX_PATH]; 8885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) wchar_t drive[] = L" :"; 8895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // For each string in the drive mapping, get the junction that links 8915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // to it. If that junction is a prefix of |device_path|, then we 8925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // know that |drive| is the real path prefix. 8935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) while (*drive_map_ptr) { 8945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) drive[0] = drive_map_ptr[0]; // Copy the drive letter. 8955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (QueryDosDevice(drive, device_path_as_string, MAX_PATH)) { 8975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FilePath device_path(device_path_as_string); 8985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (device_path == nt_device_path || 8995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) device_path.IsParent(nt_device_path)) { 9005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *out_drive_letter_path = FilePath(drive + 9015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) nt_device_path.value().substr(wcslen(device_path_as_string))); 9025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 9035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 9045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 9055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Move to the next drive letter string, which starts one 9065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // increment after the '\0' that terminates the current string. 9075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) while (*drive_map_ptr++); 9085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 9095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // No drive matched. The path does not start with a device junction 9115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // that is mounted as a drive letter. This means there is no drive 9125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // letter path to the volume that holds |device_path|, so fail. 9135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 9145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 9155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool NormalizeToNativeFilePath(const FilePath& path, FilePath* nt_path) { 9175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadRestrictions::AssertIOAllowed(); 9185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // In Vista, GetFinalPathNameByHandle() would give us the real path 9195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // from a file handle. If we ever deprecate XP, consider changing the 9205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // code below to a call to GetFinalPathNameByHandle(). The method this 9215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // function uses is explained in the following msdn article: 9225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // http://msdn.microsoft.com/en-us/library/aa366789(VS.85).aspx 9235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::win::ScopedHandle file_handle( 9245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ::CreateFile(path.value().c_str(), 9255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) GENERIC_READ, 9265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) kFileShareAll, 9275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NULL, 9285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) OPEN_EXISTING, 9295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FILE_ATTRIBUTE_NORMAL, 9305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NULL)); 9315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!file_handle) 9325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 9335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Create a file mapping object. Can't easily use MemoryMappedFile, because 9355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // we only map the first byte, and need direct access to the handle. You can 9365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // not map an empty file, this call fails in that case. 9375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::win::ScopedHandle file_map_handle( 9385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ::CreateFileMapping(file_handle.Get(), 9395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NULL, 9405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PAGE_READONLY, 9415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 0, 9425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1, // Just one byte. No need to look at the data. 9435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NULL)); 9445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!file_map_handle) 9455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 9465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Use a view of the file to get the path to the file. 9485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void* file_view = MapViewOfFile(file_map_handle.Get(), 9495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FILE_MAP_READ, 0, 0, 1); 9505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!file_view) 9515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 9525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The expansion of |path| into a full path may make it longer. 9545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // GetMappedFileName() will fail if the result is longer than MAX_PATH. 9555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Pad a bit to be safe. If kMaxPathLength is ever changed to be less 9565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // than MAX_PATH, it would be nessisary to test that GetMappedFileName() 9575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // not return kMaxPathLength. This would mean that only part of the 9585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // path fit in |mapped_file_path|. 9595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int kMaxPathLength = MAX_PATH + 10; 9605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) wchar_t mapped_file_path[kMaxPathLength]; 9615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool success = false; 9625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) HANDLE cp = GetCurrentProcess(); 9635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (::GetMappedFileNameW(cp, file_view, mapped_file_path, kMaxPathLength)) { 9645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *nt_path = FilePath(mapped_file_path); 9655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) success = true; 9665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 9675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ::UnmapViewOfFile(file_view); 9685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return success; 9695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 9705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace file_util 972