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/*
* Copyright 2004 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "webrtc/base/win32filesystem.h"
#include "webrtc/base/win32.h"
#include <shellapi.h>
#include <shlobj.h>
#include <tchar.h>
#include <memory>
#include "webrtc/base/arraysize.h"
#include "webrtc/base/checks.h"
#include "webrtc/base/fileutils.h"
#include "webrtc/base/pathutils.h"
#include "webrtc/base/stream.h"
#include "webrtc/base/stringutils.h"
// In several places in this file, we test the integrity level of the process
// before calling GetLongPathName. We do this because calling GetLongPathName
// when running under protected mode IE (a low integrity process) can result in
// a virtualized path being returned, which is wrong if you only plan to read.
// TODO: Waiting to hear back from IE team on whether this is the
// best approach; IEIsProtectedModeProcess is another possible solution.
namespace rtc {
bool Win32Filesystem::CreateFolder(const Pathname &pathname) {
if (pathname.pathname().empty() || !pathname.filename().empty())
return false;
std::wstring path16;
if (!Utf8ToWindowsFilename(pathname.pathname(), &path16))
return false;
DWORD res = ::GetFileAttributes(path16.c_str());
if (res != INVALID_FILE_ATTRIBUTES) {
// Something exists at this location, check if it is a directory
return ((res & FILE_ATTRIBUTE_DIRECTORY) != 0);
} else if ((GetLastError() != ERROR_FILE_NOT_FOUND)
&& (GetLastError() != ERROR_PATH_NOT_FOUND)) {
// Unexpected error
return false;
}
// Directory doesn't exist, look up one directory level
if (!pathname.parent_folder().empty()) {
Pathname parent(pathname);
parent.SetFolder(pathname.parent_folder());
if (!CreateFolder(parent)) {
return false;
}
}
return (::CreateDirectory(path16.c_str(), nullptr) != 0);
}
FileStream *Win32Filesystem::OpenFile(const Pathname &filename,
const std::string &mode) {
FileStream *fs = new FileStream();
if (fs && !fs->Open(filename.pathname().c_str(), mode.c_str(), nullptr)) {
delete fs;
fs = nullptr;
}
return fs;
}
bool Win32Filesystem::DeleteFile(const Pathname &filename) {
LOG(LS_INFO) << "Deleting file " << filename.pathname();
if (!IsFile(filename)) {
RTC_DCHECK(IsFile(filename));
return false;
}
return ::DeleteFile(ToUtf16(filename.pathname()).c_str()) != 0;
}
bool Win32Filesystem::DeleteEmptyFolder(const Pathname &folder) {
LOG(LS_INFO) << "Deleting folder " << folder.pathname();
std::string no_slash(folder.pathname(), 0, folder.pathname().length()-1);
return ::RemoveDirectory(ToUtf16(no_slash).c_str()) != 0;
}
bool Win32Filesystem::GetTemporaryFolder(Pathname &pathname, bool create,
const std::string *append) {
wchar_t buffer[MAX_PATH + 1];
if (!::GetTempPath(arraysize(buffer), buffer))
return false;
if (!IsCurrentProcessLowIntegrity() &&
!::GetLongPathName(buffer, buffer, arraysize(buffer)))
return false;
size_t len = strlen(buffer);
if ((len > 0) && (buffer[len-1] != '\\')) {
len += strcpyn(buffer + len, arraysize(buffer) - len, L"\\");
}
if (len >= arraysize(buffer) - 1)
return false;
pathname.clear();
pathname.SetFolder(ToUtf8(buffer));
if (append != nullptr) {
RTC_DCHECK(!append->empty());
pathname.AppendFolder(*append);
}
return !create || CreateFolder(pathname);
}
std::string Win32Filesystem::TempFilename(const Pathname &dir,
const std::string &prefix) {
wchar_t filename[MAX_PATH];
if (::GetTempFileName(ToUtf16(dir.pathname()).c_str(),
ToUtf16(prefix).c_str(), 0, filename) != 0)
return ToUtf8(filename);
RTC_NOTREACHED();
return "";
}
bool Win32Filesystem::MoveFile(const Pathname &old_path,
const Pathname &new_path) {
if (!IsFile(old_path)) {
RTC_DCHECK(IsFile(old_path));
return false;
}
LOG(LS_INFO) << "Moving " << old_path.pathname()
<< " to " << new_path.pathname();
return ::MoveFile(ToUtf16(old_path.pathname()).c_str(),
ToUtf16(new_path.pathname()).c_str()) != 0;
}
bool Win32Filesystem::IsFolder(const Pathname &path) {
WIN32_FILE_ATTRIBUTE_DATA data = {0};
if (0 == ::GetFileAttributesEx(ToUtf16(path.pathname()).c_str(),
GetFileExInfoStandard, &data))
return false;
return (data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ==
FILE_ATTRIBUTE_DIRECTORY;
}
bool Win32Filesystem::IsFile(const Pathname &path) {
WIN32_FILE_ATTRIBUTE_DATA data = {0};
if (0 == ::GetFileAttributesEx(ToUtf16(path.pathname()).c_str(),
GetFileExInfoStandard, &data))
return false;
return (data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == 0;
}
bool Win32Filesystem::IsAbsent(const Pathname& path) {
WIN32_FILE_ATTRIBUTE_DATA data = {0};
if (0 != ::GetFileAttributesEx(ToUtf16(path.pathname()).c_str(),
GetFileExInfoStandard, &data))
return false;
DWORD err = ::GetLastError();
return (ERROR_FILE_NOT_FOUND == err || ERROR_PATH_NOT_FOUND == err);
}
bool Win32Filesystem::CopyFile(const Pathname &old_path,
const Pathname &new_path) {
return ::CopyFile(ToUtf16(old_path.pathname()).c_str(),
ToUtf16(new_path.pathname()).c_str(), TRUE) != 0;
}
bool Win32Filesystem::IsTemporaryPath(const Pathname& pathname) {
TCHAR buffer[MAX_PATH + 1];
if (!::GetTempPath(arraysize(buffer), buffer))
return false;
if (!IsCurrentProcessLowIntegrity() &&
!::GetLongPathName(buffer, buffer, arraysize(buffer)))
return false;
return (::strnicmp(ToUtf16(pathname.pathname()).c_str(),
buffer, strlen(buffer)) == 0);
}
bool Win32Filesystem::GetFileSize(const Pathname &pathname, size_t *size) {
WIN32_FILE_ATTRIBUTE_DATA data = {0};
if (::GetFileAttributesEx(ToUtf16(pathname.pathname()).c_str(),
GetFileExInfoStandard, &data) == 0)
return false;
*size = data.nFileSizeLow;
return true;
}
bool Win32Filesystem::GetFileTime(const Pathname& path, FileTimeType which,
time_t* time) {
WIN32_FILE_ATTRIBUTE_DATA data = {0};
if (::GetFileAttributesEx(ToUtf16(path.pathname()).c_str(),
GetFileExInfoStandard, &data) == 0)
return false;
switch (which) {
case FTT_CREATED:
FileTimeToUnixTime(data.ftCreationTime, time);
break;
case FTT_MODIFIED:
FileTimeToUnixTime(data.ftLastWriteTime, time);
break;
case FTT_ACCESSED:
FileTimeToUnixTime(data.ftLastAccessTime, time);
break;
default:
return false;
}
return true;
}
bool Win32Filesystem::GetAppPathname(Pathname* path) {
TCHAR buffer[MAX_PATH + 1];
if (0 == ::GetModuleFileName(nullptr, buffer, arraysize(buffer)))
return false;
path->SetPathname(ToUtf8(buffer));
return true;
}
bool Win32Filesystem::GetAppTempFolder(Pathname* path) {
if (!GetAppPathname(path))
return false;
std::string filename(path->filename());
return GetTemporaryFolder(*path, true, &filename);
}
} // namespace rtc
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