Private declarations. More...

#include <kdb.h>
#include <kdbconfig.h>
#include <kdbextension.h>
#include <kdbhelper.h>
#include <kdbplugin.h>
#include <kdbproposal.h>
#include <kdbtypes.h>
#include <limits.h>

Include dependency graph for kdbprivate.h:

This graph shows which files directly or indirectly include this file:

Macros
#define	KEYSET_SIZE 16
	The minimal allocation size of a keyset inclusive NULL byte. More...

#define	NR_OF_PLUGINS 10
	How many plugins can exist in an backend. More...

#define	COMMIT_PLUGIN 7
	The index of the commit plugin.

#define	STORAGE_PLUGIN 5
	The index of the storage plugin.

#define	RESOLVER_PLUGIN 0
	The index of the resolver plugin.

#define	APPROXIMATE_NR_OF_BACKENDS 16
	Trie optimization.

#define	MAX_LEN_INT 31
	The maximum of how many characters an integer needs as decimal number. More...

#define	KDB_SYSTEM_ELEKTRA "system/elektra"
	Backend mounting information. More...

#define	test_bit(var, bit) ((var) & (bit))
	Test a bit. More...

#define	set_bit(var, bit) ((var) \|= (bit))
	Set a bit. More...

#define	clear_bit(var, bit) ((var) &= ~(bit))
	Clear a bit. More...

Enumerations
enum	keyflag_t { KEY_FLAG_SYNC = 1, KEY_FLAG_RO_NAME = 1 << 1, KEY_FLAG_RO_VALUE = 1 << 2, KEY_FLAG_RO_META = 1 << 3 }
	Key Flags. More...

enum	ksflag_t { KS_FLAG_SYNC = 1 }
	Ks Flags. More...

enum	GlobalpluginPositions
	Helper for identifying global plugin positions.

enum	splitflag_t { SPLIT_FLAG_SYNC = 1, SPLIT_FLAG_CASCADING = 1 << 1 }

Functions
Split *	elektraSplitNew (void)
	Allocates a new split object. More...

void	elektraSplitDel (Split *keysets)
	Delete a split object. More...

void	elektraSplitResize (Split *ret)
	Doubles the size of how many parts of keysets can be appended. More...

void	elektraSplitRemove (Split *split, size_t where)
	Remove one part of split. More...

ssize_t	elektraSplitAppend (Split split, Backend backend, Key *parentKey, int syncbits)
	Increases the size of split and appends a new empty keyset. More...

ssize_t	elektraSplitSearchBackend (Split split, Backend backend, Key *key)
	Determines if the backend is already inserted or not. More...

int	elektraSplitSearchRoot (Split split, Key parentKey)

int	elektraSplitBuildup (Split split, KDB handle, Key *parentKey)
	Walks through kdb->split and adds all backends below parentKey to split. More...

void	elektraSplitUpdateFileName (Split split, KDB handle, Key *key)
	Update the (configuration) file name for the parent key. More...

int	elektraSplitAppoint (Split split, KDB handle, KeySet *ks)
	Appoints all keys from ks to yet unsynced splits. More...

int	elektraSplitGet (Split split, Key warningKey, KDB *handle)
	Does some work after getting of backends is finished. More...

int	elektraSplitMerge (Split split, KeySet dest)
	Merges together all parts of split into dest. More...

int	elektraSplitCheckSize (Split *split)
	Check if any of the split is uninitialized. More...

int	elektraSplitDivide (Split split, KDB handle, KeySet *ks)
	Splits up the keysets and search for a sync bit in every key. More...

int	elektraSplitSync (Split *split)
	Add sync bits everywhere keys were removed/added. More...

void	elektraSplitPrepare (Split *split)
	Prepares for kdbSet() mainloop afterwards. More...

int	elektraSplitUpdateSize (Split *split)
	Also update sizes after kdbSet() to recognize multiple kdbSet() attempts. More...

Backend *	elektraBackendOpen (KeySet elektra_config, KeySet modules, Key *errorKey)
	Builds a backend out of the configuration supplied from: More...

Backend *	elektraBackendOpenMissing (Key *mountpoint)
	Opens the internal backend that indicates that a backend is missing at that place. More...

Backend *	elektraBackendOpenDefault (KeySet modules, const char file, Key *errorKey)
	Opens a default backend using the plugin named KDB_RESOLVER and KDB_STORAGE. More...

Backend *	elektraBackendOpenModules (KeySet modules, Key errorKey)

Backend *	elektraBackendOpenVersion (Key *errorKey)
	Opens the internal version backend. More...

int	elektraBackendUpdateSize (Backend backend, Key parent, int size)
	Update internal size in backend. More...

int	elektraProcessPlugin (Key cur, int pluginNumber, char pluginName, char referenceName, Key *errorKey)

int	elektraProcessPlugins (Plugin *plugins, KeySet modules, KeySet referencePlugins, KeySet config, KeySet systemConfig, Key errorKey)
	Load a plugin. More...

Plugin *	elektraPluginOpen (const char backendname, KeySet modules, KeySet config, Key errorKey)
	Opens a plugin. More...

int	elektraTrieClose (Trie trie, Key errorKey)
	Closes the trie and all opened backends within. More...

Backend *	elektraTrieLookup (Trie trie, const Key key)
	Internal Datastructure for mountpoints. More...

int	elektraMountOpen (KDB kdb, KeySet config, KeySet modules, Key errorKey)
	Creates a trie from a given configuration. More...

int	elektraMountDefault (KDB kdb, KeySet modules, int inFallback, Key *errorKey)
	Reopens the default backend and mounts the default backend if needed. More...

int	elektraMountModules (KDB kdb, KeySet modules, Key *errorKey)
	Mount all module configurations. More...

int	elektraMountVersion (KDB kdb, Key errorKey)
	Mount the version backend. More...

int	elektraMountBackend (KDB kdb, Backend backend, Key *errorKey)
	Mounts a backend into the trie. More...

Key *	elektraMountGetMountpoint (KDB handle, const Key where)
	Lookup a mountpoint in a handle for a specific key. More...

Backend *	elektraMountGetBackend (KDB handle, const Key key)
	Lookup a backend handle for a specific key. More...

Key *	elektraKsPrev (KeySet *ks)
	Returns the previous Key in a KeySet. More...

Key *	elektraKsPopAtCursor (KeySet *ks, cursor_t pos)
	Pop key at given cursor position. More...

int	elektraKeyLock (Key *key, enum elektraLockOptions what)
	Permanently locks a part of the key. More...

ssize_t	elektraMemcpy (Key array1, Key array2, size_t size)
	Internal Methods for Elektra. More...

ssize_t	elektraMemmove (Key array1, Key array2, size_t size)
	Copies the key array2 into where array1 points. More...

char *	elektraStrNDup (const char *s, size_t l)
	Copy buffer into new allocated memory. More...

int	elektraValidateKeyName (const char *name, size_t size)
	Validates whether the supplied keyname is valid. More...

KeySet *	elektraRenameKeys (KeySet config, const char name)
	Takes the first key and cuts off this common part for all other keys, instead name will be prepended. More...

int	keyIsSystem (const Key *key)
	Check whether a key is under the `system` namespace or not. More...

int	keyIsUser (const Key *key)
	Check whether a key is under the `user` namespace or not. More...

Detailed Description

Private declarations.

Copyright: BSD License (see doc/COPYING or http://www.libelektra.org)

Macro Definition Documentation

#define clear_bit	(	var,
		bit
	)	((var) &= ~(bit))

Clear a bit.

See also: set_bit()

#define KDB_SYSTEM_ELEKTRA "system/elektra"

Backend mounting information.

This key directory tells you where each backend is mounted to which mountpoint.

#define KEYSET_SIZE 16

The minimal allocation size of a keyset inclusive NULL byte.

ksGetAlloc() will return one less because it says how much can actually be stored.

#define MAX_LEN_INT 31

The maximum of how many characters an integer needs as decimal number.

#define NR_OF_PLUGINS 10

How many plugins can exist in an backend.

#define set_bit	(	var,
		bit
	)	((var) \|= (bit))

Set a bit.

See also: clear_bit()

#define test_bit	(	var,
		bit
	)	((var) & (bit))

Test a bit.

See also: set_bit(), clear_bit()

Enumeration Type Documentation

enum keyflag_t

Key Flags.

Store a synchronizer state so that the Elektra knows if something has changed or not.

Enumerator
KEY_FLAG_SYNC	Key need sync. If name, value or metadata are changed this flag will be set, so that the backend will sync the key to database.
KEY_FLAG_RO_NAME	Read only flag for name. Key name is read only and not allowed to be changed. All attempts to change the name will lead to an error. Needed for meta keys and keys that are in a data structure that depends on name ordering.
KEY_FLAG_RO_VALUE	Read only flag for value. Key value is read only and not allowed to be changed. All attempts to change the value will lead to an error. Needed for meta keys
KEY_FLAG_RO_META	Read only flag for meta. Key meta is read only and not allowed to be changed. All attempts to change the value will lead to an error. Needed for meta keys.

enum ksflag_t

Ks Flags.

Store a synchronizer state so that the Elektra knows if something has changed or not.

Enumerator
KS_FLAG_SYNC	KeySet need sync. If keys were popped from the Keyset this flag will be set, so that the backend will sync the keys to database.

enum splitflag_t

Enumerator
SPLIT_FLAG_SYNC	KeySet in Split need sync. Is there any key in there which need to be synced? If keys were popped from the Keyset this flag will be set, so that the backend will sync the keys to database.
SPLIT_FLAG_CASCADING	Do we need relative checks? Is this a cascading backend?

Function Documentation

Backend* elektraBackendOpen	(	KeySet *	elektraConfig,
		KeySet *	modules,
		Key *	errorKey
	)

Builds a backend out of the configuration supplied from:

system/elektra/mountpoints/<name>

The root key must be like the above example. You do not need to rewind the keyset. But every key must be below the root key.

The internal consistency will be checked in this function. If necessary parts are missing, like no plugins, they cant be loaded or similar 0 will be returned.

ksCut() is perfectly suitable for cutting out the configuration like needed.

Note: The given KeySet will be deleted within the function, don't use it afterwards.

Parameters

elektraConfig	the configuration to work with. It is used to build up this backend.
modules	used to load new modules or get references to existing one
errorKey	the key where an error and warnings are added

Returns: a pointer to a freshly allocated backend this could be the requested backend or a so called "missing backend".

Return values

0	if out of memory

Backend* elektraBackendOpenDefault	(	KeySet *	modules,
		const char *	file,
		Key *	errorKey
	)

Opens a default backend using the plugin named KDB_RESOLVER and KDB_STORAGE.

Parameters

modules	the modules to work with
errorKey	the key to issue warnings and errors to

Returns: the fresh allocated default backend or 0 if it failed

Backend* elektraBackendOpenMissing ( Key * mp )

Opens the internal backend that indicates that a backend is missing at that place.

Returns: the fresh allocated backend or 0 if no memory

Backend* elektraBackendOpenModules	(	KeySet *	modules,
		Key *	errorKey
	)

Returns: a backend which gives plugin configuration of the module which is currently point to.

Parameters

modules	the modules to work with
errorKey	the key to issue warnings and errors to

Backend* elektraBackendOpenVersion ( Key * errorKey )

Opens the internal version backend.

Parameters

errorKey the key to issue warnings and errors to

Returns: the fresh allocated default backend or 0 if it failed

int elektraBackendUpdateSize	(	Backend *	backend,
		Key *	parent,
		int	size
	)

Update internal size in backend.

Parameters

backend	the backend to update
parent	for parent
size	to update (-1 default, 0 empty, >0 otherwise)

Precondition: parent must be serializable namespace

Return values

-1	if invalid parent (assert)
0	on success

int elektraKeyLock	(	Key *	key,
		enum elektraLockOptions	what
	)

Permanently locks a part of the key.

This can be:

KEY_FLAG_LOCK_NAME to lock the name
KEY_FLAG_LOCK_VALUE to lock the value
KEY_FLAG_LOCK_META to lock the meta data

To unlock the key, duplicate it.

It is also possible to lock when the key is created with keyNew().

Some data structures need to lock the key (most likely its name), so that the ordering does not get confused.

Parameters

key	which name should be locked

See also: keyNew(), keyDup(), ksAppendKey()

Return values

>0	the bits that were successfully locked
0	if everything was locked before
-1	if it could not be locked (nullpointer)

Key* elektraKsPopAtCursor	(	KeySet *	ks,
		cursor_t	pos
	)

Pop key at given cursor position.

Parameters

ks	the keyset to pop key from
c	where to pop

The internal cursor will be rewinded using ksRewind(). You can use ksGetCursor() and ksSetCursor() jump back to the previous position. e.g. to pop at current position within ksNext() loop:

 cursor_t c = ksGetCursor(ks);
 keyDel (ksPopAtCursor(ks, c));
 ksSetCursor(ks, c);
 ksPrev(ks); // to have correct key after next ksNext()

Warning: do not use, will be superseded by external iterator API

Returns: the popped key

Return values

0	if ks is 0

Key* elektraKsPrev ( KeySet * ks )

Returns the previous Key in a KeySet.

KeySets have an internal cursor that can be reset with ksRewind(). Every time ksPrev() is called the cursor is decremented and the new current Key is returned.

You'll get a NULL pointer if the key before begin of the KeySet was reached.

Don't delete the key, use ksPop() if you want to delete it.

Returns: the new current Key

See also: ksRewind(), ksCurrent()

ssize_t elektraMemcpy	(	Key **	array1,
		Key **	array2,
		size_t	size
	)

Internal Methods for Elektra.

To use them:

1 #include <kdbinternal.h>

There are some areas where libraries have to reimplement some basic functions to archive support for non-standard systems, for testing purposes or to provide a little more convenience. Copies the key array2 into where array1 points. It copies size elements.

Overlapping is prohibited, use elektraMemmove() instead.

Parameters

array1	the destination
array2	the source
size	how many pointer to Keys to copy

Return values

-1	on null pointers
0	if nothing was done

Returns: size how many keys were copied

ssize_t elektraMemmove	(	Key **	array1,
		Key **	array2,
		size_t	size
	)

Copies the key array2 into where array1 points.

It copies size elements.

Overlapping is ok. If they do not overlap consider elektraMemcpy() instead.

Parameters

array1	the destination
array2	the source
size	how many pointer to Keys to copy

Return values

-1	on null pointers
0	if nothing was done

Returns: size how many keys were copied

int elektraMountBackend	(	KDB *	kdb,
		Backend *	backend,
		Key *	errorKey
	)

Mounts a backend into the trie.

Precondition: user must pass correctly allocated backend

Postcondition: sets reference counter of backend

Warning: in case of init and default backends, the reference counter needs to be modified after calling elektraMountBackend.

Parameters

kdb	the handle to work with
backend	the backend to mount
errorKey	the key used to report warnings

Return values

-1	on failure
1	on success

int elektraMountDefault	(	KDB *	kdb,
		KeySet *	modules,
		int	inFallback,
		Key *	errorKey
	)

Reopens the default backend and mounts the default backend if needed.

Precondition: Default Backend is closed. elektraMountOpen was executed before.

Parameters

kdb	the handle to work with
modules	the current list of loaded modules
errorKey	the key used to report warnings

Return values

-1	on error
0	on success

Backend* elektraMountGetBackend	(	KDB *	handle,
		const Key *	key
	)

Lookup a backend handle for a specific key.

The required canonical name is ensured by using a key as parameter, which will transform the key to canonical representation.

Will return handle when no more specific KDB could be found.

If key is 0 or invalid the default backend will be returned.

Parameters

handle	is the data structure, where the mounted directories are saved.
key	the key, that should be looked up.

Returns: the backend handle associated with the key

Key* elektraMountGetMountpoint	(	KDB *	handle,
		const Key *	where
	)

Lookup a mountpoint in a handle for a specific key.

Will return a key representing the mountpoint or null if there is no appropriate mountpoint e.g. its the root mountpoint.

Example:: 1 Key * key = keyNew ("system/template");

2 KDB * handle = kdbOpen();

3 Key *mountpoint=0;

4 mountpoint=kdbGetMountpoint(handle, key);

5

6 printf("The backend I am using is %s mounted in %s\n",

7 keyValue(mountpoint),

8 keyName(mountpoint));

9 kdbClose (handle);

10 keyDel (key);

Parameters

handle	is the data structure, where the mounted directories are saved.
where	the key, that should be looked up.

Returns: the mountpoint associated with the key

int elektraMountModules	(	KDB *	kdb,
		KeySet *	modules,
		Key *	errorKey
	)

Mount all module configurations.

Parameters

kdb	the handle to work with
modules	the current list of loaded modules
errorKey	the key used to report warnings

Return values

-1	if not rootkey was found
0	otherwise

int elektraMountOpen	(	KDB *	kdb,
		KeySet *	config,
		KeySet *	modules,
		Key *	errorKey
	)

Creates a trie from a given configuration.

The config will be deleted within this function.

Note: elektraMountDefault is not allowed to be executed before

Parameters

kdb	the handle to work with
modules	the current list of loaded modules
config	the configuration which should be used to build up the trie.
errorKey	the key used to report warnings

Return values

-1	on failure
0	on success

int elektraMountVersion	(	KDB *	kdb,
		Key *	errorKey
	)

Mount the version backend.

Parameters

kdb	the handle to work with
errorKey	the key used to report warnings

Return values

0	on success

Plugin* elektraPluginOpen	(	const char *	name,
		KeySet *	modules,
		KeySet *	config,
		Key *	errorKey
	)

Opens a plugin.

The config will be used as is. So be sure to transfer ownership of the config to it, with e.g. ksDup(). elektraPluginClose() will delete the config.

Returns: a pointer to a new created plugin or 0 on error

int elektraProcessPlugin	(	Key *	cur,
		int *	pluginNumber,
		char **	pluginName,
		char **	referenceName,
		Key *	errorKey
	)

Return values

1	and an allocated string of the pluginName if a new plugins should be created.
2	and an allocated string of the referenceName if an old plugin should be used
3	and both if a new plugin should be created and made available for later back referencing.
-1	on error

int elektraProcessPlugins	(	Plugin **	plugins,
		KeySet *	modules,
		KeySet *	referencePlugins,
		KeySet *	config,
		KeySet *	systemConfig,
		Key *	errorKey
	)

Load a plugin.

The array of plugins must be set to 0. Its length is NR_OF_PLUGINS.

systemConfig will only be used, not deleted.

Parameters

config	the config with the information how the plugins should be put together
systemConfig	the shared (system) config for the plugins. Every plugin additional get this config.

Return values

-1	on failure

KeySet* elektraRenameKeys	(	KeySet *	config,
		const char *	name
	)

Takes the first key and cuts off this common part for all other keys, instead name will be prepended.

Returns: a new allocated keyset with keys in user namespace.

The first key is removed in the resulting keyset.

ssize_t elektraSplitAppend	(	Split *	split,
		Backend *	backend,
		Key *	parentKey,
		int	syncbits
	)

Increases the size of split and appends a new empty keyset.

Initializes the element with the given parameters at size-1 to be used.

Will automatically resize split if needed.

Parameters

split	the split object to work with
backend	the backend which should be appended
parentKey	the parentKey which should be appended
syncbits	the initial syncstate which should be appended

Return values

-1	if no split is found

Returns: the position of the new element: size-1

int elektraSplitAppoint	(	Split *	split,
		KDB *	handle,
		KeySet *	ks
	)

Appoints all keys from ks to yet unsynced splits.

Precondition: elektraSplitBuildup() need to be executed before.

Parameters

split	the split object to work with
handle	to determine to which backend a key belongs
ks	the keyset to appoint to split

Return values

1	on success
-1	if no backend was found for a key

int elektraSplitBuildup	(	Split *	split,
		KDB *	kdb,
		Key *	parentKey
	)

Walks through kdb->split and adds all backends below parentKey to split.

Sets syncbits to 2 if it is a default or root backend (which needs splitting). The information is copied from kdb->split.

Precondition: split needs to be empty, directly after creation with elektraSplitNew().; there needs to be a valid defaultBackend but its ok not to have a trie inside KDB.; parentKey must be a valid key! (could be implemented more generally, but that would require splitting up of keysets of the same backend)

Parameters

split	will get all backends appended
kdb	the handle to get information about backends
parentKey	the information below which key the backends are from interest

Return values

1 always

int elektraSplitCheckSize ( Split * split )

Check if any of the split is uninitialized.

Parameters

split

Return values

-1	if size is wrong
1	if everything is ok

void elektraSplitDel ( Split * keysets )

Delete a split object.

Will free all allocated resources of a split keyset.

Parameters

keysets the split object to work with

int elektraSplitDivide	(	Split *	split,
		KDB *	handle,
		KeySet *	ks
	)

Splits up the keysets and search for a sync bit in every key.

It does not check if there were removed keys, see elektraSplitSync() for the next step.

It does not create new backends, this has to be done by buildup before.

Precondition: elektraSplitBuildup() need to be executed before.

Parameters

split	the split object to work with
handle	to get information where the individual keys belong
ks	the keyset to divide

Return values

0	if there were no sync bits
1	if there were sync bits
-1	if no backend was found for any key

int elektraSplitGet	(	Split *	split,
		Key *	warningKey,
		KDB *	handle
	)

Does some work after getting of backends is finished.

Update sizes
Removal of wrong keys

Precondition: elektraSplitAppoint() needs to be executed before.

check if keys are in correct backend
remove syncbits
update sizes in the backends

Parameters

split	the split object to work with
warningKey	postcondition violations are reported here
handle	the handle to preprocess the keys

Return values

1	on success
-1	if no backend was found for a key or split->parents has invalid namespace

int elektraSplitMerge	(	Split *	split,
		KeySet *	dest
	)

Merges together all parts of split into dest.

Parameters

split	the split object to work with
dest	the destination keyset where all keysets are appended.

Return values

1	on success

Split* elektraSplitNew ( void )

Allocates a new split object.

Splits up a keyset into multiple keysets where each of them will passed to the correct kdbSet().

Initially the size is 0 and alloc is APPROXIMATE_NR_OF_BACKENDS.

Returns: a fresh allocated split object

See also: elektraSplitDel()

void elektraSplitPrepare ( Split * split )

Prepares for kdbSet() mainloop afterwards.

All splits which do not need sync are removed and a deep copy of the remaining keysets is done.

Parameters

split the split object to work with

void elektraSplitRemove	(	Split *	split,
		size_t	where
	)

Remove one part of split.

Parameters

split	the split object to work with
where	the position to cut away

Precondition: where must be within the size of the split

Postcondition: split will be removed

void elektraSplitResize ( Split * split )

Doubles the size of how many parts of keysets can be appended.

Parameters

split the split object to work with

ssize_t elektraSplitSearchBackend	(	Split *	split,
		Backend *	backend,
		Key *	parent
	)

Determines if the backend is already inserted or not.

Warning: If no parent Key is given, the default/root backends won't be searched.

Parameters

split	the split object to work with
backend	the backend to search for
parent	the key to check for domains in default/root backends.

Returns: pos of backend if it already exist

Return values

-1	if it does not exist

int elektraSplitSearchRoot	(	Split *	split,
		Key *	parentKey
	)

Return values

1	if one of the backends in split has all keys below parentKey
0	if parentKey == 0 or there are keys below or same than parentKey which do not fit in any of split keysets

Parameters

split	the split object to work with
parentKey	the key which relation is searched for

int elektraSplitSync ( Split * split )

Add sync bits everywhere keys were removed/added.

checks if the size of a previous kdbGet() is unchanged.
checks if in correct state (kdbGet() needs to be executed before)

Only elektraSplitDivide() together with this function can really decide if sync is needed or not.

Precondition: split needs to be processed with elektraSplitDivide() before.

Return values

0	if kdbSet() is not needed
1	if kdbSet() is needed
-1	on wrong keys (also has assert, should not happen)
-2	wrong spec state: kdbGet() was not executed before
-3	wrong dir state: kdbGet() was not executed before
-4	wrong user state: kdbGet() was not executed before
-5	wrong system state: kdbGet() was not executed before

Precondition: user/system was split before.

Parameters

split the split object to work with

void elektraSplitUpdateFileName	(	Split *	split,
		KDB *	handle,
		Key *	key
	)

Update the (configuration) file name for the parent key.

Parameters

split	the split to work with
handle	the handle to work with
key	the parentKey that should be updated (name must be correct)

int elektraSplitUpdateSize ( Split * split )

Also update sizes after kdbSet() to recognize multiple kdbSet() attempts.

Warning: cant use the same code with elektraSplitGet because there is no default split part for kdbSet().

char* elektraStrNDup	(	const char *	s,
		size_t	l
	)

Copy buffer into new allocated memory.

You need to free the memory yourself.

This function also works with \0 characters in the buffer. The length is taken as given, it must be correct.

Returns: 0 if out of memory, a pointer otherwise

Parameters

s	must be a allocated buffer
l	the length of s

int elektraTrieClose	(	Trie *	trie,
		Key *	errorKey
	)

Closes the trie and all opened backends within.

Parameters

trie	the trie to close
errorKey	the key used to report warnings

Return values

0	on success

Backend* elektraTrieLookup	(	Trie *	trie,
		const Key *	key
	)

Internal Datastructure for mountpoints.

Lookups a backend inside the trie.

Returns: the backend if found; 0 otherwise

Parameters

trie	the trie object to work with
key	the name of this key will be looked up

int elektraValidateKeyName	(	const char *	name,
		size_t	size
	)

Validates whether the supplied keyname is valid.

The function looks for tangling escape characters in the end and for a minimum length.

Does not check for valid namespaces

Precondition: size must be at least 2

Parameters

name	the key name that is to be checked
size	a elektraStrLen of the key name

Return values

true	if the supplied keyname part is valid
false	if its invalid

Macros

Enumerations

Functions

Detailed Description

Macro Definition Documentation

Enumeration Type Documentation

Function Documentation