cuttlefish::ChrootReadWriteFilesystem Class Reference

#include <chroot.h>

Inheritance diagram for cuttlefish::ChrootReadWriteFilesystem:

Collaboration diagram for cuttlefish::ChrootReadWriteFilesystem:

Public Member Functions
	ChrootReadWriteFilesystem (ReadWriteFilesystem &real_filesystem, std::string_view path_prefix)
Result< std::unique_ptr< ReaderSeeker > >	OpenReadOnly (std::string_view path) override
Result< uint32_t >	FileAttributes (std::string_view path) const override
Result< std::unique_ptr< ReaderWriterSeeker > >	CreateFile (std::string_view path) override
Result< void >	DeleteFile (std::string_view path) override
Result< std::unique_ptr< ReaderWriterSeeker > >	OpenReadWrite (std::string_view path) override
virtual Result< std::unique_ptr< ReaderWriterSeeker > >	CreateFile (std::string_view path)=0
virtual Result< void >	DeleteFile (std::string_view path)=0
virtual Result< std::unique_ptr< ReaderWriterSeeker > >	OpenReadWrite (std::string_view path)=0
Public Member Functions inherited from cuttlefish::ReadFilesystem
virtual	~ReadFilesystem ()=default
virtual Result< std::unique_ptr< ReaderSeeker > >	OpenReadOnly (std::string_view path)=0
virtual Result< uint32_t >	FileAttributes (std::string_view path) const =0

Private Member Functions
Result< std::string >	ChrootToRealPath (std::string_view) const

Private Attributes
ReadWriteFilesystem *	real_filesystem_
std::string	path_prefix_

Detailed Description

Wraps access to another ReadWriteFilesystem with an imposed path prefix.

Attempts to normalize file paths to avoid escaping by using absolute paths or ".." members, but is not safe against symlinks or bind mounts.

This is comparable to the fakechroot tool.

Constructor & Destructor Documentation

ChrootReadWriteFilesystem()

cuttlefish::ChrootReadWriteFilesystem::ChrootReadWriteFilesystem	(	ReadWriteFilesystem &	real_filesystem,
		std::string_view	path_prefix
	)

Member Function Documentation

ChrootToRealPath()

Result< std::string > cuttlefish::ChrootReadWriteFilesystem::ChrootToRealPath ( std::string_view  path ) const

private

CreateFile()

Result< std::unique_ptr< ReaderWriterSeeker > > cuttlefish::ChrootReadWriteFilesystem::CreateFile ( std::string_view  path )

overridevirtual

Implements cuttlefish::ReadWriteFilesystem.

DeleteFile()

Result< void > cuttlefish::ChrootReadWriteFilesystem::DeleteFile ( std::string_view  path )

overridevirtual

Implements cuttlefish::ReadWriteFilesystem.

FileAttributes()

Result< uint32_t > cuttlefish::ChrootReadWriteFilesystem::FileAttributes ( std::string_view  path ) const

overridevirtual

Implements cuttlefish::ReadFilesystem.

OpenReadOnly()

Result< std::unique_ptr< ReaderSeeker > > cuttlefish::ChrootReadWriteFilesystem::OpenReadOnly ( std::string_view  path )

overridevirtual

Implements cuttlefish::ReadFilesystem.

OpenReadWrite()

Result< std::unique_ptr< ReaderWriterSeeker > > cuttlefish::ChrootReadWriteFilesystem::OpenReadWrite ( std::string_view  path )

overridevirtual

Implements cuttlefish::ReadWriteFilesystem.

Member Data Documentation

path_prefix_

std::string cuttlefish::ChrootReadWriteFilesystem::path_prefix_

private

real_filesystem_

ReadWriteFilesystem* cuttlefish::ChrootReadWriteFilesystem::real_filesystem_

private

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The documentation for this class was generated from the following files:

• cuttlefish/io/chroot.h
• cuttlefish/io/chroot.cc