Handle access to a medium. More...

#include <MediaAccess.h>

Inheritance diagram for zypp::media::MediaAccess:

Classes
class	FileProvider
	Helper class that provides file on construction and cleans up on destruction. More...

Public Types
typedef intrusive_ptr< MediaAccess >	Ptr

typedef intrusive_ptr< const MediaAccess >	constPtr

Public Member Functions
	MediaAccess ()
	constructor More...

void	open (const Url &url, const Pathname &preferred_attach_point="")
	open url. More...

bool	isOpen () const
	True if media is open. More...

bool	downloads () const
	Hint if files are downloaded or not. More...

std::string	protocol () const
	Used Protocol if media is opened, otherwise 'unknown'. More...

Url	url () const
	Url if media is opened, otherwise empty. More...

void	close ()
	close url More...

void	attach (bool next=false)
	Use concrete handler to attach the media. More...

bool	isAttached () const
	True if media is attached. More...

bool	hasMoreDevices () const

virtual void	getDetectedDevices (std::vector< std::string > &devices, unsigned int &index) const
	Fill in a vector of detected ejectable devices and the index of the currently attached device within the vector. More...

Pathname	localRoot () const
	Return the local directory that corresponds to medias url, no matter if media isAttached or not. More...

Pathname	localPath (const Pathname &pathname) const
	Short for 'localRoot() + pathname', but returns an empty pathname if media is not open. More...

void	disconnect ()
	Use concrete handler to disconnect the media. More...

void	release (const std::string &ejectDev="")
	Use concrete handler to release the media. More...

void	provideFile (const Pathname &filename, const ByteCount &expectedFileSize) const
	Use concrete handler to provide file denoted by path below 'attach point'. More...

void	releaseFile (const Pathname &filename) const
	Remove filename below attach point IFF handler downloads files to the local filesystem. More...

void	provideDir (const Pathname &dirname) const
	Use concrete handler to provide directory denoted by path below 'attach point' (not recursive!). More...

void	provideDirTree (const Pathname &dirname) const
	Use concrete handler to provide directory tree denoted by path below 'attach point' (recursive!!). More...

void	releaseDir (const Pathname &dirname) const
	Remove directory tree below attach point IFF handler downloads files to the local filesystem. More...

void	releasePath (const Pathname &pathname) const
	Remove pathname below attach point IFF handler downloads files to the local filesystem. More...

void	setDeltafile (const Pathname &filename) const
	set a deltafile to be used in the next download More...

void	dirInfo (std::list< std::string > &retlist, const Pathname &dirname, bool dots=true) const
	Return content of directory on media via retlist. More...

void	dirInfo (filesystem::DirContent &retlist, const Pathname &dirname, bool dots=true) const
	Basically the same as dirInfo above. More...

bool	doesFileExist (const Pathname &filename) const
	check if a file exists More...

virtual	~MediaAccess ()
	Destructor. More...

virtual std::ostream &	dumpOn (std::ostream &str) const
	Overload to realize std::ostream & operator<<. More...

void	getFile (const Url &from, const Pathname &to)
	Get file from location at specified by URL and copy it to destination. More...

Public Member Functions inherited from zypp::base::ReferenceCounted
	ReferenceCounted ()
	Default ctor. More...

	ReferenceCounted (const ReferenceCounted &rhs)
	Copy ctor. More...

virtual	~ReferenceCounted ()
	Dtor. More...

ReferenceCounted &	operator= (const ReferenceCounted &)
	Assignment. More...

unsigned	refCount () const
	Return reference counter value. More...

void	ref () const
	Add a reference. More...

void	unref () const
	Release a reference. More...

Private Member Functions
AttachedMedia	attachedMedia () const

bool	isSharedMedia () const

void	resetParentId ()

bool	dependsOnParent () const

bool	dependsOnParent (MediaAccessId parentId, bool exactIdMatch) const

Private Attributes
MediaHandler *	_handler
	handler for 'physical' media == 0 if not open More...

Static Private Attributes
static const Pathname	_noPath

Friends
class	MediaManager

class	MediaManager_Impl

Additional Inherited Members
Static Public Member Functions inherited from zypp::base::ReferenceCounted
static void	add_ref (const ReferenceCounted *ptr_r)
	Called by zypp::intrusive_ptr to add a reference. More...

static void	release (const ReferenceCounted *ptr_r)
	Called by zypp::intrusive_ptr to add a reference. More...

Protected Member Functions inherited from zypp::base::ReferenceCounted
virtual void	ref_to (unsigned) const
	Trigger derived classes after refCount was increased. More...

virtual void	unref_to (unsigned) const
	Trigger derived classes after refCount was decreased. More...

Related Functions inherited from zypp::base::ReferenceCounted
void	intrusive_ptr_add_ref (const ReferenceCounted *ptr_r)

void	intrusive_ptr_release (const ReferenceCounted *ptr_r)

std::ostream &	operator<< (std::ostream &str, const ReferenceCounted &obj)

Detailed Description

Handle access to a medium.

The concrete MediaHandler for a certain url is created on open and deleted on @close.

The inteface here basically checks whether the handler exists, then forwards the request to MediaHandler.

Definition at line 50 of file MediaAccess.h.

Member Typedef Documentation

◆ Ptr

typedef intrusive_ptr<MediaAccess> zypp::media::MediaAccess::Ptr

Definition at line 53 of file MediaAccess.h.

◆ constPtr

typedef intrusive_ptr<const MediaAccess> zypp::media::MediaAccess::constPtr

Definition at line 54 of file MediaAccess.h.

Constructor & Destructor Documentation

◆ MediaAccess()

zypp::media::MediaAccess::MediaAccess ( )

constructor

Definition at line 53 of file MediaAccess.cc.

◆ ~MediaAccess()

zypp::media::MediaAccess::~MediaAccess ( )

virtual

Destructor.

Definition at line 59 of file MediaAccess.cc.

Member Function Documentation

◆ attachedMedia()

AttachedMedia zypp::media::MediaAccess::attachedMedia ( ) const

private

Definition at line 69 of file MediaAccess.cc.

◆ isSharedMedia()

bool zypp::media::MediaAccess::isSharedMedia ( ) const

private

Definition at line 76 of file MediaAccess.cc.

◆ resetParentId()

void zypp::media::MediaAccess::resetParentId ( )

private

Definition at line 83 of file MediaAccess.cc.

◆ dependsOnParent() [1/2]

bool zypp::media::MediaAccess::dependsOnParent ( ) const

private

Definition at line 89 of file MediaAccess.cc.

◆ dependsOnParent() [2/2]

bool zypp::media::MediaAccess::dependsOnParent	(	MediaAccessId	parentId,
		bool	exactIdMatch
	)		const

private

Definition at line 95 of file MediaAccess.cc.

◆ open()

void zypp::media::MediaAccess::open	(	const Url &	url,
		const Pathname &	preferred_attach_point = `""`
	)

open url.

If preferred_attach_point is given, try to use it as attach point.

Caution: The medium can choose a different attach point. Only getAttachPoint() knows the real attach point.

Exceptions

MediaException

Definition at line 104 of file MediaAccess.cc.

◆ isOpen()

bool zypp::media::MediaAccess::isOpen ( ) const

inline

True if media is open.

Definition at line 100 of file MediaAccess.h.

◆ downloads()

bool zypp::media::MediaAccess::downloads ( ) const

Hint if files are downloaded or not.

Returns: True, if the files are downloaded.

Definition at line 211 of file MediaAccess.cc.

◆ protocol()

std::string zypp::media::MediaAccess::protocol ( ) const

Used Protocol if media is opened, otherwise 'unknown'.

Definition at line 202 of file MediaAccess.cc.

◆ url()

Url zypp::media::MediaAccess::url ( ) const

Url if media is opened, otherwise empty.

Definition at line 222 of file MediaAccess.cc.

◆ close()

void zypp::media::MediaAccess::close ( )

close url

Exceptions

MediaException

Definition at line 232 of file MediaAccess.cc.

◆ attach()

void zypp::media::MediaAccess::attach ( bool next = false )

Use concrete handler to attach the media.

Parameters

next	try next available device in turn until end of device list is reached (for media which are accessible through multiple devices like cdroms).

Exceptions

MediaException

Definition at line 256 of file MediaAccess.cc.

◆ isAttached()

bool zypp::media::MediaAccess::isAttached ( ) const

True if media is attached.

Exceptions

MediaException

Definition at line 266 of file MediaAccess.cc.

◆ hasMoreDevices()

bool zypp::media::MediaAccess::hasMoreDevices ( ) const

Definition at line 272 of file MediaAccess.cc.

◆ getDetectedDevices()

void zypp::media::MediaAccess::getDetectedDevices	(	std::vector< std::string > &	devices,
		unsigned int &	index
	)		const

virtual

Fill in a vector of detected ejectable devices and the index of the currently attached device within the vector.

The contents of the vector are the device names (/dev/cdrom and such).

Parameters

devices	vector to load with the device names
index	index of the currently used device in the devices vector

Definition at line 279 of file MediaAccess.cc.

◆ localRoot()

Pathname zypp::media::MediaAccess::localRoot ( ) const

Return the local directory that corresponds to medias url, no matter if media isAttached or not.

Files requested will be available at 'localRoot() + filename' or better 'localPath( filename )'.

If media is not open an empty pathname is returned.

Definition at line 297 of file MediaAccess.cc.

◆ localPath()

Pathname zypp::media::MediaAccess::localPath ( const Pathname & pathname ) const

Short for 'localRoot() + pathname', but returns an empty pathname if media is not open.

Files provided will be available at 'localPath(filename)'.

Definition at line 308 of file MediaAccess.cc.

◆ disconnect()

void zypp::media::MediaAccess::disconnect ( )

Use concrete handler to disconnect the media.

This is useful for media which e.g. holds open a connection to a server like FTP. After calling disconnect() the media object still is valid and files are present.

After calling disconnect() it's not possible to call provideFile() or provideDir() anymore.

Exceptions

MediaException

Definition at line 317 of file MediaAccess.cc.

◆ release()

void zypp::media::MediaAccess::release ( const std::string & ejectDev = "" )

Use concrete handler to release the media.

Parameters

ejectDev Device to eject. None if empty.

Exceptions

MediaException

Definition at line 327 of file MediaAccess.cc.

◆ provideFile()

void zypp::media::MediaAccess::provideFile	(	const Pathname &	filename,
		const ByteCount &	expectedFileSize
	)		const

Use concrete handler to provide file denoted by path below 'attach point'.

Filename is interpreted relative to the attached url and a path prefix is preserved.

Parameters

cached	If cached is set to true, the function checks, if the file already exists and doesn't download it again if it does. Currently only the existence is checked, no other file attributes.
checkonly	If this and 'cached' are set to true only the existence of the file is checked but it's not downloaded. If 'cached' is unset an errer is returned always.

Exceptions

MediaException

Definition at line 340 of file MediaAccess.cc.

◆ releaseFile()

void zypp::media::MediaAccess::releaseFile ( const Pathname & filename ) const

Remove filename below attach point IFF handler downloads files to the local filesystem.

Never remove anything from media.

Exceptions

MediaException

Definition at line 360 of file MediaAccess.cc.

◆ provideDir()

void zypp::media::MediaAccess::provideDir ( const Pathname & dirname ) const

Use concrete handler to provide directory denoted by path below 'attach point' (not recursive!).

'dirname' is interpreted relative to the attached url and a path prefix is preserved.

Exceptions

MediaException

Definition at line 373 of file MediaAccess.cc.

◆ provideDirTree()

void zypp::media::MediaAccess::provideDirTree ( const Pathname & dirname ) const

Use concrete handler to provide directory tree denoted by path below 'attach point' (recursive!!).

'dirname' is interpreted relative to the attached url and a path prefix is preserved.

Exceptions

MediaException

Definition at line 383 of file MediaAccess.cc.

◆ releaseDir()

void zypp::media::MediaAccess::releaseDir ( const Pathname & dirname ) const

Remove directory tree below attach point IFF handler downloads files to the local filesystem.

Never remove anything from media.

Exceptions

MediaException

Definition at line 393 of file MediaAccess.cc.

◆ releasePath()

void zypp::media::MediaAccess::releasePath ( const Pathname & pathname ) const

Remove pathname below attach point IFF handler downloads files to the local filesystem.

Never remove anything from media.

If pathname denotes a directory it is recursively removed. If pathname is empty or '/' everything below the attachpoint is recursively removed.

Exceptions

MediaException

Definition at line 402 of file MediaAccess.cc.

◆ setDeltafile()

void zypp::media::MediaAccess::setDeltafile ( const Pathname & filename ) const

set a deltafile to be used in the next download

Definition at line 350 of file MediaAccess.cc.

◆ dirInfo() [1/2]

void zypp::media::MediaAccess::dirInfo	(	std::list< std::string > &	retlist,
		const Pathname &	dirname,
		bool	dots = `true`
	)		const

Return content of directory on media via retlist.

If dots is false entries starting with '.' are not reported.

The request is forwarded to the concrete handler, which may atempt to retieve the content e.g. via 'readdir'

Caution: This is not supported by all media types. Be prepared to handle E_not_supported_by_media.

Exceptions

MediaException

Definition at line 412 of file MediaAccess.cc.

◆ dirInfo() [2/2]

void zypp::media::MediaAccess::dirInfo	(	filesystem::DirContent &	retlist,
		const Pathname &	dirname,
		bool	dots = `true`
	)		const

Basically the same as dirInfo above.

The content is returned as filesystem::DirContent, which includes name and filetype of each directory entry. Retrieving the filetype usg. requires an additional ::stat call for each entry, thus it's more expensive than a simple readdir.

Caution: This is not supported by all media types. Be prepared to handle E_not_supported_by_media.

Exceptions

MediaException

Definition at line 425 of file MediaAccess.cc.

◆ doesFileExist()

bool zypp::media::MediaAccess::doesFileExist ( const Pathname & filename ) const

check if a file exists

Asserted that url is a file and not a dir.

Exceptions

MediaException

Definition at line 438 of file MediaAccess.cc.

◆ dumpOn()

std::ostream & zypp::media::MediaAccess::dumpOn ( std::ostream & str ) const

virtual

Overload to realize std::ostream & operator<<.

Reimplemented from zypp::base::ReferenceCounted.

Definition at line 448 of file MediaAccess.cc.

◆ getFile()

void zypp::media::MediaAccess::getFile	(	const Url &	from,
		const Pathname &	to
	)

Get file from location at specified by URL and copy it to destination.

Parameters

from	Source URL
to	Destination file name

Exceptions

MediaException

Definition at line 457 of file MediaAccess.cc.

Friends And Related Function Documentation

◆ MediaManager

friend class MediaManager

friend

Definition at line 66 of file MediaAccess.h.

◆ MediaManager_Impl

friend class MediaManager_Impl

friend

Definition at line 67 of file MediaAccess.h.

Member Data Documentation

◆ _noPath

const Pathname zypp::media::MediaAccess::_noPath

staticprivate

Definition at line 58 of file MediaAccess.h.

◆ _handler

MediaHandler* zypp::media::MediaAccess::_handler

private

handler for 'physical' media == 0 if not open

Definition at line 64 of file MediaAccess.h.

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

zypp/media/MediaAccess.h
zypp/media/MediaAccess.cc

Classes

Public Types

Public Member Functions

Private Member Functions

Private Attributes

Static Private Attributes

Friends

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ Ptr

◆ constPtr

Constructor & Destructor Documentation

◆ MediaAccess()

◆ ~MediaAccess()

Member Function Documentation

◆ attachedMedia()

◆ isSharedMedia()

◆ resetParentId()

◆ dependsOnParent() [1/2]

◆ dependsOnParent() [2/2]

◆ open()

◆ isOpen()

◆ downloads()

◆ protocol()

◆ url()

◆ close()

◆ attach()

◆ isAttached()

◆ hasMoreDevices()

◆ getDetectedDevices()

◆ localRoot()

◆ localPath()

◆ disconnect()

◆ release()

◆ provideFile()

◆ releaseFile()

◆ provideDir()

◆ provideDirTree()

◆ releaseDir()

◆ releasePath()

◆ setDeltafile()

◆ dirInfo() [1/2]

◆ dirInfo() [2/2]

◆ doesFileExist()

◆ dumpOn()

◆ getFile()

Friends And Related Function Documentation

◆ MediaManager

◆ MediaManager_Impl

Member Data Documentation

◆ _noPath

◆ _handler