Samba4/LDB/API
Initialization
ldb_global_init()
int ldb_global_init(void);
Initialise ldbs' global information
This is required before any other LDB call
Return: 0 if initialisation succeeded, -1 otherwise
ldb_init()
struct ldb_context *ldb_init(TALLOC_CTX *mem_ctx, struct tevent_context *ev_ctx);
Initialise an ldb context
This is required before any other LDB call.
Parameters:
- mem_ctx: pointer to a talloc memory context. Pass NULL if there is no suitable context available.
Return: pointer to ldb_context that should be free'd (using talloc_free()) at the end of the program.
Connection
ldb_connect()
int ldb_connect(struct ldb_context *ldb, const char *url, unsigned int flags, const char *options[]);
Connect to a database.
This is typically called soon after ldb_init(), and is required prior to any search or database modification operations.
The URL can be one of the following forms:
- tdb://path
- ldapi://path
- ldap://host
- sqlite://path
Parameters:
- ldb: the context associated with the database (from ldb_init())
- url: the URL of the database to connect to, as noted above
- flags: a combination of LDB_FLG_* to modify the connection behaviour
- options: backend specific options - passed uninterpreted to the backend
Return: result code (LDB_SUCCESS on success, or a failure code)
It is an error to connect to a database that does not exist in readonly mode (that is, with LDB_FLG_RDONLY). However in read-write mode, the database will be created if it does not exist.
Root DSE
ldb_get_root_basedn()
struct ldb_dn *ldb_get_root_basedn(struct ldb_context *ldb);
Return: an automatic basedn from the rootDomainNamingContext of the rootDSE. This value have been set in an opaque pointer at connection time
ldb_get_config_basedn()
struct ldb_dn *ldb_get_config_basedn(struct ldb_context *ldb);
Return: an automatic basedn from the configurationNamingContext of the rootDSE. This value have been set in an opaque pointer at connection time
ldb_get_schema_basedn()
struct ldb_dn *ldb_get_schema_basedn(struct ldb_context *ldb);
Return: an automatic basedn from the schemaNamingContext of the rootDSE. This value have been set in an opaque pointer at connection time
ldb_get_default_basedn()
struct ldb_dn *ldb_get_default_basedn(struct ldb_context *ldb);
Return: an automatic baseDN from the defaultNamingContext of the rootDSE. This value have been set in an opaque pointer at connection time.
Attributes
ldb_attr_cmp()
#define ldb_attr_cmp(a, b) strcasecmp(a, b)
Compare two attributes
This function compares to attribute names. Note that this is a case-insensitive comparison.
Parameters:
- a: the first attribute name to compare
- b: the second attribute name to compare
Return 0 if the attribute names are the same, or only differ in case; non-zero if there are any differences
attribute names are restricted by rfc2251 so using strcasecmp and toupper here is ok. return 0 for match
ldb_attr_casefold()
char *ldb_attr_casefold(TALLOC_CTX *mem_ctx, const char *s);
ldb_attr_dn()
int ldb_attr_dn(const char *attr);
LDAP Operations
ldb_search()
int ldb_search(struct ldb_context *ldb, TALLOC_CTX *mem_ctx, struct ldb_result **result, struct ldb_dn *base, enum ldb_scope scope, const char * const *attrs, const char *exp_fmt, ...) PRINTF_ATTRIBUTE(7,8);
Search the database
This function searches the database, and returns records that match an LDAP-like search expression
Parameters:
- ldb the: context associated with the database (from ldb_init())
- mem_ctx: the memory context to use for the request and the results
- result: the return result
- base: the Base Distinguished Name for the query (use ldb_dn_new() for an empty one)
- scope: the search scope for the query
- attrs: the search attributes for the query (pass NULL if none required)
- exp_fmt: the search expression to use for this query (printf like)
Return: result code (LDB_SUCCESS on success, or a failure code)
Note: Use talloc_free() to free the ldb_result returned.
ldb_add()
int ldb_add(struct ldb_context *ldb, const struct ldb_message *message);
Add a record to the database.
This function adds a record to the database. This function will fail if a record with the specified class and key already exists in the database.
Parameters:
- ldb: the context associated with the database (from ldb_init())
- message: the message containing the record to add.
Return: result code (LDB_SUCCESS if the record was added, otherwise a failure code)
ldb_modify()
int ldb_modify(struct ldb_context *ldb, const struct ldb_message *message);
Modify the specified attributes of a record
This function modifies a record that is in the database.
Parameters:
- ldb: the context associated with the database (from ldb_init())
- message: the message containing the changes required.
Return: result code (LDB_SUCCESS if the record was modified as requested, otherwise a failure code)
ldb_rename()
int ldb_rename(struct ldb_context *ldb, struct ldb_dn *olddn, struct ldb_dn *newdn);
Rename a record in the database
This function renames a record in the database.
Parameters:
- ldb: the context associated with the database (from ldb_init())
- olddn: the DN for the record to be renamed.
- newdn: the new DN
Return: result code (LDB_SUCCESS if the record was renamed as requested, otherwise a failure code)
ldb_delete()
int ldb_delete(struct ldb_context *ldb, struct ldb_dn *dn);
Delete a record from the database
This function deletes a record from the database.
Parameters:
- ldb: the context associated with the database (from ldb_init())
- dn: the DN for the record to be deleted.
Return: result code (LDB_SUCCESS if the record was deleted, otherwise a failure code)