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RocksDB for Erlang

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rocksdb deps rocksdb env env_chroot.h
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deps/rocksdb/env/env_chroot.h 

//  Copyright (c) 2016-present, Facebook, Inc.  All rights reserved.

//  This source code is licensed under both the GPLv2 (found in the

//  COPYING file in the root directory) and Apache 2.0 License

//  (found in the LICENSE.Apache file in the root directory).



#pragma once



#if !defined(OS_WIN)



#include <string>



#include "env/fs_remap.h"

#include "rocksdb/file_system.h"



namespace ROCKSDB_NAMESPACE {

class ChrootFileSystem : public RemapFileSystem {

 public:

  ChrootFileSystem(const std::shared_ptr<FileSystem>& base,

                   const std::string& chroot_dir);



  static const char* kClassName() { return "ChrootFS"; }

  const char* Name() const override { return kClassName(); }



  IOStatus GetTestDirectory(const IOOptions& options, std::string* path,

                            IODebugContext* dbg) override;



  Status PrepareOptions(const ConfigOptions& options) override;



 protected:

  // Returns status and expanded absolute path including the chroot directory.

  // Checks whether the provided path breaks out of the chroot. If it returns

  // non-OK status, the returned path should not be used.

  std::pair<IOStatus, std::string> EncodePath(const std::string& path) override;



  // Similar to EncodePath() except assumes the basename in the path hasn't been

  // created yet.

  std::pair<IOStatus, std::string> EncodePathWithNewBasename(

      const std::string& path) override;



 private:

  std::string chroot_dir_;

};



// Returns an Env that translates paths such that the root directory appears to

// be chroot_dir. chroot_dir should refer to an existing directory.

//

// This class has not been fully analyzed for providing strong security

// guarantees.

Env* NewChrootEnv(Env* base_env, const std::string& chroot_dir);

std::shared_ptr<FileSystem> NewChrootFileSystem(

    const std::shared_ptr<FileSystem>& base, const std::string& chroot_dir);



}  // namespace ROCKSDB_NAMESPACE



#endif  // !defined(OS_WIN)