bool FileSystem::uncheckedRenameReplace(const QString& originFileName,
const QString& destinationFileName,
QString* errorString)
{
#ifndef Q_OS_WIN
bool success;
QFile orig(originFileName);
#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
success = orig.fileEngine()->rename(destinationFileName);
// qDebug() << "Renaming " << tmpFile.fileName() << " to " << fn;
#else
// We want a rename that also overwites. QFile::rename does not overwite.
// Qt 5.1 has QSaveFile::renameOverwrite we could use.
// ### FIXME
success = true;
bool destExists = fileExists(destinationFileName);
if( destExists && !QFile::remove(destinationFileName) ) {
*errorString = orig.errorString();
qDebug() << Q_FUNC_INFO << "Target file could not be removed.";
success = false;
}
if( success ) {
success = orig.rename(destinationFileName);
}
#endif
if (!success) {
*errorString = orig.errorString();
qDebug() << "FAIL: renaming temp file to final failed: " << *errorString ;
return false;
}
#else //Q_OS_WIN
BOOL ok;
QString orig = longWinPath(originFileName);
QString dest = longWinPath(destinationFileName);
ok = MoveFileEx((wchar_t*)orig.utf16(),
(wchar_t*)dest.utf16(),
MOVEFILE_REPLACE_EXISTING+MOVEFILE_COPY_ALLOWED+MOVEFILE_WRITE_THROUGH);
if (!ok) {
wchar_t *string = 0;
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM,
NULL, ::GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPWSTR)&string, 0, NULL);
*errorString = QString::fromWCharArray(string);
qDebug() << "FAIL: renaming temp file to final failed: " << *errorString;
LocalFree((HLOCAL)string);
return false;
}
#endif
return true;
}
bool FileSystem::uncheckedRenameReplace(const QString &originFileName,
const QString &destinationFileName,
QString *errorString)
{
#ifndef Q_OS_WIN
bool success;
QFile orig(originFileName);
// We want a rename that also overwites. QFile::rename does not overwite.
// Qt 5.1 has QSaveFile::renameOverwrite we could use.
// ### FIXME
success = true;
bool destExists = fileExists(destinationFileName);
if (destExists && !QFile::remove(destinationFileName)) {
*errorString = orig.errorString();
qCWarning(lcFileSystem) << "Target file could not be removed.";
success = false;
}
if (success) {
success = orig.rename(destinationFileName);
}
if (!success) {
*errorString = orig.errorString();
qCWarning(lcFileSystem) << "Renaming temp file to final failed: " << *errorString;
return false;
}
#else //Q_OS_WIN
// You can not overwrite a read-only file on windows.
if (!QFileInfo(destinationFileName).isWritable()) {
setFileReadOnly(destinationFileName, false);
}
BOOL ok;
QString orig = longWinPath(originFileName);
QString dest = longWinPath(destinationFileName);
ok = MoveFileEx((wchar_t *)orig.utf16(),
(wchar_t *)dest.utf16(),
MOVEFILE_REPLACE_EXISTING + MOVEFILE_COPY_ALLOWED + MOVEFILE_WRITE_THROUGH);
if (!ok) {
wchar_t *string = 0;
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
NULL, ::GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPWSTR)&string, 0, NULL);
*errorString = QString::fromWCharArray(string);
qCWarning(lcFileSystem) << "Renaming temp file to final failed: " << *errorString;
LocalFree((HLOCAL)string);
return false;
}
#endif
return true;
}
bool FileSystem::rename(const QString &originFileName,
const QString &destinationFileName,
QString *errorString)
{
bool success = false;
QString error;
#ifdef Q_OS_WIN
QString orig = longWinPath(originFileName);
QString dest = longWinPath(destinationFileName);
if (isLnkFile(originFileName) || isLnkFile(destinationFileName)) {
success = MoveFileEx((wchar_t*)orig.utf16(),
(wchar_t*)dest.utf16(),
MOVEFILE_COPY_ALLOWED | MOVEFILE_WRITE_THROUGH);
if (!success) {
wchar_t *string = 0;
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
NULL, ::GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPWSTR)&string, 0, NULL);
error = QString::fromWCharArray(string);
LocalFree((HLOCAL)string);
}
} else
#endif
{
QFile orig(originFileName);
success = orig.rename(destinationFileName);
if (!success) {
error = orig.errorString();
}
}
if (!success) {
qDebug() << "FAIL: renaming file" << originFileName
<< "to" << destinationFileName
<< "failed: " << error;
if (errorString) {
*errorString = error;
}
}
return success;
}
void FileSystem::setFileHidden(const QString& filename, bool hidden)
{
#ifdef _WIN32
QString fName = longWinPath(filename);
DWORD dwAttrs;
dwAttrs = GetFileAttributesW( (wchar_t*)fName.utf16() );
if (dwAttrs != INVALID_FILE_ATTRIBUTES) {
if (hidden && !(dwAttrs & FILE_ATTRIBUTE_HIDDEN)) {
SetFileAttributesW((wchar_t*)fName.utf16(), dwAttrs | FILE_ATTRIBUTE_HIDDEN );
} else if (!hidden && (dwAttrs & FILE_ATTRIBUTE_HIDDEN)) {
SetFileAttributesW((wchar_t*)fName.utf16(), dwAttrs & ~FILE_ATTRIBUTE_HIDDEN );
}
}
#endif
}
bool FileSystem::openAndSeekFileSharedRead(QFile* file, QString* errorOrNull, qint64 seek)
{
QString errorDummy;
// avoid many if (errorOrNull) later.
QString& error = errorOrNull ? *errorOrNull : errorDummy;
error.clear();
#ifdef Q_OS_WIN
//
// The following code is adapted from Qt's QFSFileEnginePrivate::nativeOpen()
// by including the FILE_SHARE_DELETE share mode.
//
// Enable full sharing.
DWORD shareMode = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE;
int accessRights = GENERIC_READ;
DWORD creationDisp = OPEN_EXISTING;
// Create the file handle.
SECURITY_ATTRIBUTES securityAtts = { sizeof(SECURITY_ATTRIBUTES), NULL, FALSE };
QString fName = longWinPath(file->fileName());
HANDLE fileHandle = CreateFileW(
(const wchar_t*)fName.utf16(),
accessRights,
shareMode,
&securityAtts,
creationDisp,
FILE_ATTRIBUTE_NORMAL,
NULL);
// Bail out on error.
if (fileHandle == INVALID_HANDLE_VALUE) {
error = qt_error_string();
return false;
}
// Convert the HANDLE to an fd and pass it to QFile's foreign-open
// function. The fd owns the handle, so when QFile later closes
// the fd the handle will be closed too.
int fd = _open_osfhandle((intptr_t)fileHandle, _O_RDONLY);
if (fd == -1) {
error = "could not make fd from handle";
return false;
}
if (!file->open(fd, QIODevice::ReadOnly, QFile::AutoCloseHandle)) {
error = file->errorString();
return false;
}
// Seek to the right spot
LARGE_INTEGER *li = reinterpret_cast<LARGE_INTEGER*>(&seek);
DWORD newFilePointer = SetFilePointer(fileHandle, li->LowPart, &li->HighPart, FILE_BEGIN);
if (newFilePointer == 0xFFFFFFFF && GetLastError() != NO_ERROR) {
error = qt_error_string();
return false;
}
return true;
#else
if (!file->open(QFile::ReadOnly)) {
error = file->errorString();
return false;
}
if (!file->seek(seek)) {
error = file->errorString();
return false;
}
return true;
#endif
}
