Key :: Methods for Making Tests

NAME

Methods to do various tests on Keys.

Functions

int keyNeedStat (const Key *key)

int keyNeedSync (const Key *key)

int keyNeedRemove (const Key *key)

int keyIsSystem (const Key *key)

int keyIsUser (const Key *key)

int keyIsBelow (const Key *key, const Key *check)

int keyIsDirectBelow (const Key *key, const Key *check)

int keyIsInactive (const Key *key)

int keyIsDir (const Key *key)

int keyIsBinary (const Key *key)

int keyIsString (const Key *key)
 

Detailed Description

Methods to do various tests on Keys.

To use them:

#include <kdb.h>

Function Documentation

int keyIsBelow (const Key * key, const Key * check)Check if the key check is below the key key or not.

Example:
key user/sw/app
check user/sw/app/key

returns true because check is below key

Example:
key user/sw/app
check user/sw/app/folder/key

returns also true because check is indirect below key

Parameters:

key the key object to work with
check the key to find the relative position of

Returns:

1 if check is below key

0 if it is not below or if it is the same key

See also:

keySetName(), keyGetName(), keyIsDirectBelow()

int keyIsBinary (const Key * key)Check if a key is binary type.

The function checks if the keytype is in the range between KEY_TYPE_BINARY and less than excluding KEY_TYPE_STRING. Then it will be interpreted as binary.

Make sure to use this function and don't test the binary type another way to ensure compatibility and to write less error prone programs.

Returns:

1 if it is binary

0 if it is not

-1 on NULL pointer

See also:

keySetType() for more information on types

keyGetBinary(), keySetBinary()

Parameters:

key the key to check

int keyIsDir (const Key * key)Check if a key is directory key.

Folder keys may also have value and comment. They are discern by having a executable bit set.

If any executable bit is set it will be recognized as a directory.

Note:

keyIsDir may return true even though you can't access the directory.

To know if you can access the directory, you need to check, if your

*

user ID is equal the key's user ID and the mode & 100 is true

*

group ID is equal the key's group ID and the mode & 010 is true

*

mode & 001 is true

Accessing does not mean that you can get any value or comments below, see Mode for more information.

Parameters:

key the key object to work with

Returns:

1 if key is a directory, 0 otherwise

-1 on NULL pointer

See also:

keySetDir(), keySetMode()

int keyIsDirectBelow (const Key * key, const Key * check)Check if the key check is direct below the key key or not.

Example:
key user/sw/app
check user/sw/app/key

returns true because check is below key

Example:
key user/sw/app
check user/sw/app/folder/key

does not return true, because there is only a indirect relation

Parameters:

key the key object to work with
check the key to find the relative position of

Returns:

1 if check is below key

0 if it is not below or if it is the same key

-1 on null pointer

See also:

keyIsBelow(), keySetName(), keyGetName()

int keyIsInactive (const Key * key)Check whether a key is inactive or not.

In elektra terminology any key is inactive if the it's basename starts with '.'. Inactive keys must not have any meaning to applications, they are reserved for users and administrators.

To remove a whole hierarchy in elektra, don't forget to pass option_t::KDB_O_INACTIVE to kdbGet() to receive the inactive keys in order to remove them.

Otherwise you should not fetch these keys.

Parameters:

key the key object to work with

Returns:

1 if the key is inactive, 0 otherwise

-1 on NULL pointer or when key has no name

int keyIsString (const Key * key)Check if a key is string type.

The function checks if the keytype is larger or equal KEY_TYPE_STRING. Then it will be considered as string type.

Make sure to use this function and don't test the string type another way to ensure compatibility and to write less error prone programs.

Returns:

1 if it is string

0 if it is not

-1 on NULL pointer

See also:

keySetType for more information on types

keyGetString(), keySetString()

Parameters:

key the key to check

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

Parameters:

key the key object to work with

Returns:

1 if key name begins with system, 0 otherwise

-1 on NULL pointer

See also:

keyIsUser(), keySetName(), keyName()

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

Parameters:

key the key object to work with

Returns:

1 if key name begins with user, 0 otherwise

-1 on NULL pointer

See also:

keyIsSystem(), keySetName(), keyName()

int keyNeedRemove (const Key * key)Ask if key is marked for permanent remove.

Ask if the key will be removed instead of writing in the key database when doing kdbSetKey() or kdbSet().

See also:

keyRemove()

kdbSet(), kdbSetKey(), kdbRemove()

Parameters:

key the key object to work with

Returns:

1 if it is marked, 0 otherwise

-1 on NULL pointer

int keyNeedStat (const Key * key)Ask if key is marked for stat only.

Ask if the key will be stat instead of get it from the key database completely doing kdbGetKey() or kdbGet(). This is useful if you are not interested in the value, comment or key type.

See also:

keyStat(), kdbGet()

Parameters:

key the key object to work with

Returns:

1 if it is marked, 0 otherwise

-1 on NULL pointer

int keyNeedSync (const Key * key)Test if a key needs to be synced to backend storage.

If any key modification took place the key will be flagged with KEY_FLAG_SYNC so that kdbSet() knows which keys were modified and which not.

After keyNew() the flag will normally be set, but after kdbGet() and kdbSet() the flag will be removed. When you modify the key the flag will be set again.

In your application you can make use of that flag to know if you changed something in a key after a kdbGet() or kdbSet().

Note:

Note that also changes in the meta data will set that flag.

See also:

keyNew()

Parameters:

key the key object to work with

Returns:

1 if key was changed in memory, 0 otherwise

-1 on NULL pointer

Author

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