void FileLogger::rotate() {
// count current number of existing backup files
int count=0;
forever
{
QFile bakFile(QString("%1.%2").arg(fileName).arg(count+1));
if (bakFile.exists())
{
++count;
}
else
{
break;
}
}
// Remove all old backup files that exceed the maximum number
while (maxBackups>0 && count>=maxBackups)
{
QFile::remove(QString("%1.%2").arg(fileName).arg(count));
--count;
}
// Rotate backup files
for (int i=count; i>0; --i) {
QFile::rename(QString("%1.%2").arg(fileName).arg(i),QString("%1.%2").arg(fileName).arg(i+1));
}
// Backup the current logfile
QFile::rename(fileName,fileName+".1");
}
/**
* Saves changes in the current database.
* If successful, returns true and emits dbSaved() signal;
* otherwise returns false and (sometimes) emits an appropriate error signal.
*/
Q_INVOKABLE bool PwDatabaseFacade::save() {
if (!db) {
LOG("Cannot save - no DB open");
return false;
}
if (isLocked()) {
LOG("Cannot save - DB is locked");
return false;
}
emit dbAboutToSave();
// Encrypt and save to memory
QByteArray outData;
if (!db->save(outData)) {
LOG("DB saving failed");
return false;
}
// Copy original DB to temporary timestamped file
// (but when we create a DB, the original does not exist, and it is ok)
QFile dbFile(db->getDatabaseFilePath());
QString bakFileName = makeBackupFilePath(db->getDatabaseFilePath());
if (dbFile.exists() && !dbFile.copy(bakFileName)) {
LOG("Failed to backup the original DB: %s", dbFile.errorString().toUtf8().constData());
emit fileSaveError(tr("Cannot backup database file. Saving cancelled.", "An error message: failed to make a backup copy of the database file."), dbFile.errorString());
return false;
}
// Write the new data directly to the original file
if (!dbFile.open(QIODevice::WriteOnly)) {
LOG("Cannot open DB file: '%s' Error: %d. Message: %s",
dbFile.fileName().toUtf8().constData(),
dbFile.error(), dbFile.errorString().toUtf8().constData());
emit fileSaveError(tr("Cannot save database file", "An error message shown when the database file cannot be saved."), dbFile.errorString());
return false;
}
qint64 bytesWritten = dbFile.write(outData);
if ((dbFile.error() != QFile::NoError) || (bytesWritten != outData.size())) {
LOG("Cannot write to DB file. Error: %d. Message: %s", dbFile.error(), dbFile.errorString().toUtf8().constData());
emit fileSaveError(tr("Cannot write to database file", "An error message shown when the database file cannot be written to."), dbFile.errorString());
return false;
}
if (!dbFile.flush()) {
LOG("Could not flush the DB file. Error: %d. Message: %s", dbFile.error(), dbFile.errorString().toUtf8().constData());
emit fileSaveError(tr("Error writing to database file", "An error message shown when the database file cannot be written to."), dbFile.errorString());
dbFile.close();
// could not flush -> possibly not completely written -> not saved
return false;
}
dbFile.close();
if (!Settings::instance()->isBackupDatabaseOnSave()) {
// Backup switched off, so remove the backup file
// (there are no backup files for newly created DBs)
QFile bakFile(bakFileName);
if (bakFile.exists() && !bakFile.remove()) {
// Could not delete backup. Not critical and nothing we/user can do about it - so just ignore it silently.
LOG("Could not remove backup file: %s", bakFile.fileName().toUtf8().constData());
}
}
emit dbSaved();
return true;
}
