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.
DN
ldb_dn_get_linearized()
const char *ldb_dn_get_linearized(struct ldb_dn *dn);
Get the linear form of a DN (without any extended components)
Parameters:
- dn: The DN to linearize
ldb_dn_alloc_linearized()
char *ldb_dn_alloc_linearized(TALLOC_CTX *mem_ctx, struct ldb_dn *dn);
Allocate a copy of the linear form of a DN (without any extended components) onto the supplied memory context
Parameters:
- dn: The DN to linearize
- mem_ctx: TALLOC context to return result on
ldb_dn_get_extended_linearized()
char *ldb_dn_get_extended_linearized(void *mem_ctx, struct ldb_dn *dn, int mode);
Get the linear form of a DN (with any extended components)
Parameters:
- mem_ctx: TALLOC context to return result on
- dn: The DN to linearize
- mode: Style of extended DN to return (0 is HEX representation of binary form, 1 is a string form)
ldb_dn_get_extended_component()
const struct ldb_val *ldb_dn_get_extended_component(struct ldb_dn *dn, const char *name);
ldb_dn_set_extended_component()
int ldb_dn_set_extended_component(struct ldb_dn *dn, const char *name, const struct ldb_val *val);
ldb_dn_remove_extended_components()
void ldb_dn_remove_extended_components(struct ldb_dn *dn);
ldb_dn_has_extended()
bool ldb_dn_has_extended(struct ldb_dn *dn);
ldb_dn_extended_add_syntax()
int ldb_dn_extended_add_syntax(struct ldb_context *ldb, unsigned flags, const struct ldb_dn_extended_syntax *syntax);
ldb_dn_new()
struct ldb_dn *ldb_dn_new(TALLOC_CTX *mem_ctx, struct ldb_context *ldb, const char *dn);
Allocate a new DN from a string
Parameters:
- mem_ctx: TALLOC context to return resulting ldb_dn structure on
- dn: The new DN
The DN will not be parsed at this time. Use ldb_dn_validate to tell if the DN is syntacticly correct
ldb_dn_new_fmt()
struct ldb_dn *ldb_dn_new_fmt(TALLOC_CTX *mem_ctx, struct ldb_context *ldb, const char *new_fmt, ...) PRINTF_ATTRIBUTE(3,4);
Allocate a new DN from a printf style format string and arguments
Parameters:
- mem_ctx: TALLOC context to return resulting ldb_dn structure on
- new_fms: The new DN as a format string (plus arguments)
The DN will not be parsed at this time. Use ldb_dn_validate to tell if the DN is syntacticly correct
ldb_dn_from_ldb_val()
struct ldb_dn *ldb_dn_from_ldb_val(void *mem_ctx, struct ldb_context *ldb, const struct ldb_val *strdn);
Allocate a new DN from a struct ldb_val (useful to avoid buffer overrun)
Parameters:
- mem_ctx: TALLOC context to return resulting ldb_dn structure on
- dn: The new DN
The DN will not be parsed at this time. Use ldb_dn_validate to tell if the DN is syntacticly correct
ldb_dn_validate()
bool ldb_dn_validate(struct ldb_dn *dn);
Determine if this DN is syntactically valid
Parameters:
- dn: The DN to validate
ldb_dn_escape_value()
char *ldb_dn_escape_value(TALLOC_CTX *mem_ctx, struct ldb_val value);
ldb_dn_get_casefold()
const char *ldb_dn_get_casefold(struct ldb_dn *dn);
ldb_dn_alloc_casefold()
char *ldb_dn_alloc_casefold(TALLOC_CTX *mem_ctx, struct ldb_dn *dn);
ldb_dn_compare_base()
int ldb_dn_compare_base(struct ldb_dn *base, struct ldb_dn *dn);
ldb_dn_compare()
int ldb_dn_compare(struct ldb_dn *edn0, struct ldb_dn *edn1);
ldb_dn_add_base()
bool ldb_dn_add_base(struct ldb_dn *dn, struct ldb_dn *base);
ldb_dn_add_base_fmt()
bool ldb_dn_add_base_fmt(struct ldb_dn *dn, const char *base_fmt, ...) PRINTF_ATTRIBUTE(2,3);
ldb_dn_add_child()
bool ldb_dn_add_child(struct ldb_dn *dn, struct ldb_dn *child);
ldb_dn_add_child_fmt()
bool ldb_dn_add_child_fmt(struct ldb_dn *dn, const char *child_fmt, ...) PRINTF_ATTRIBUTE(2,3);
ldb_dn_remove_base_components()
bool ldb_dn_remove_base_components(struct ldb_dn *dn, unsigned int num);
ldb_dn_remove_child_components()
bool ldb_dn_remove_child_components(struct ldb_dn *dn, unsigned int num);
ldb_dn_copy()
struct ldb_dn *ldb_dn_copy(TALLOC_CTX *mem_ctx, struct ldb_dn *dn);
ldb_dn_get_parent()
struct ldb_dn *ldb_dn_get_parent(TALLOC_CTX *mem_ctx, struct ldb_dn *dn);
ldb_dn_canonical_string()
char *ldb_dn_canonical_string(TALLOC_CTX *mem_ctx, struct ldb_dn *dn);
ldb_dn_canonical_ex_string()
char *ldb_dn_canonical_ex_string(TALLOC_CTX *mem_ctx, struct ldb_dn *dn);
ldb_dn_get_comp_num()
int ldb_dn_get_comp_num(struct ldb_dn *dn);
ldb_dn_get_component_name()
const char *ldb_dn_get_component_name(struct ldb_dn *dn, unsigned int num);
ldb_dn_get_component_val()
const struct ldb_val *ldb_dn_get_component_val(struct ldb_dn *dn, unsigned int num);
ldb_dn_get_rdn_name()
const char *ldb_dn_get_rdn_name(struct ldb_dn *dn);
ldb_dn_get_rdn_val()
const struct ldb_val *ldb_dn_get_rdn_val(struct ldb_dn *dn);
ldb_dn_set_component()
int ldb_dn_set_component(struct ldb_dn *dn, int num, const char *name, const struct ldb_val val);
ldb_dn_is_valid()
bool ldb_dn_is_valid(struct ldb_dn *dn);
ldb_dn_is_special()
bool ldb_dn_is_special(struct ldb_dn *dn);
ldb_dn_check_special()
bool ldb_dn_check_special(struct ldb_dn *dn, const char *check);
ldb_dn_is_null()
bool ldb_dn_is_null(struct ldb_dn *dn);
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)