folly/folly/logging/FileHandlerFactory.h

/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once

#include <folly/logging/LogHandlerFactory.h>

namespace folly {

/**
 * FileHandlerFactory is a LogHandlerFactory that constructs log handlers
 * that write to a file.
 *
 * Note that FileHandlerFactory allows opening and appending to arbitrary files
 * based on the handler options.  This may make it unsafe to use
 * FileHandlerFactory in some contexts: for instance, a setuid binary should
 * generally avoid registering the FileHandlerFactory if they allow log
 * handlers to be configured via command line parameters, since otherwise this
 * may allow non-root users to append to files that they otherwise would not
 * have write permissions for.
 */
class FileHandlerFactory : public LogHandlerFactory { … };

} // namespace folly