пошагово по атрибутам записи LDAP (step through LDAP entry attributes)
Имя (Name)
ldap_first_attribute, ldap_next_attribute - step through LDAP
entry attributes
Библиотека (Library)
OpenLDAP LDAP (libldap, -lldap)
Синопсис (Synopsis)
#include <ldap.h>
char *ldap_first_attribute(
LDAP *ld, LDAPMessage *entry, BerElement **berptr )
char *ldap_next_attribute(
LDAP *ld, LDAPMessage *entry, BerElement *ber )
int ldap_get_attribute_ber(
LDAP *ld, LDAPMessage *entry, BerElement *ber,
BerValue *attr, BerVarray *vals )
Описание (Description)
The ldap_first_attribute(), ldap_next_attribute() and
ldap_get_attribute_ber() routines are used to step through the
attributes in an LDAP entry. ldap_first_attribute() takes an
entry as returned by ldap_first_entry(3) or ldap_next_entry(3)
and returns a pointer to character string containing the first
attribute description in the entry. ldap_next_attribute()
returns the next attribute description in the entry.
It also returns, in berptr, a pointer to a BerElement it has
allocated to keep track of its current position. This pointer
should be passed to subsequent calls to ldap_next_attribute() and
is used to effectively step through the entry's attributes. The
caller is solely responsible for freeing the BerElement pointed
to by berptr when it is no longer needed by calling ber_free(3).
When calling ber_free(3) in this instance, be sure the second
argument is 0.
The attribute names returned are suitable for inclusion in a call
to ldap_get_values(3) to retrieve the attribute's values.
The ldap_get_attribute_ber() routine allows one to iterate over
all attributes in-place, without allocating memory to hold text
for the attribute name or its values, if requested. The use case
is similar to ldap_next_attribute() except that the attribute
name is returned into attr and, if vals is non-NULL, the list of
values is stored there. Both point into the LDAP message and
remain valid only while the entry is valid. The caller is still
responsible for freeing vals with ldap_memfree(3), if used.
Ошибки (Error)
If an error occurs, NULL is returned and the ld_errno field in
the ld parameter is set to indicate the error. See ldap_error(3)
for a description of possible error codes.
Примечание (Note)
The ldap_first_attribute() and ldap_next_attribute() return
dynamically allocated memory that must be freed by the caller via
ldap_memfree(3). For ldap_get_attribute_ber(), only the actual
vals pointer needs to be freed with ldap_memfree(3), other data
is accounted for as part of ber.
Смотри также (See also)
ldap(3), ldap_first_entry(3), ldap_get_values(3), ldap_error(3)
