дождитесь результата операции LDAP (wait for the result of an LDAP operation)
Имя (Name)
ldap_result - Wait for the result of an LDAP operation
Библиотека (Library)
OpenLDAP LDAP (libldap, -lldap)
Синопсис (Synopsis)
#include <ldap.h>
int ldap_result( LDAP *ld, int msgid, int all,
struct timeval *timeout, LDAPMessage **result );
int ldap_msgfree( LDAPMessage *msg );
int ldap_msgtype( LDAPMessage *msg );
int ldap_msgid( LDAPMessage *msg );
Описание (Description)
The ldap_result() routine is used to wait for and return the
result of an operation previously initiated by one of the LDAP
asynchronous operation routines (e.g., ldap_search_ext(3),
ldap_modify_ext(3), etc.). Those routines all return -1 in case
of error, and an invocation identifier upon successful initiation
of the operation. The invocation identifier is picked by the
library and is guaranteed to be unique across the LDAP session.
It can be used to request the result of a specific operation from
ldap_result() through the msgid parameter.
The ldap_result() routine will block or not, depending upon the
setting of the timeout parameter. If timeout is not a NULL
pointer, it specifies a maximum interval to wait for the
selection to complete. If timeout is a NULL pointer, the
LDAP_OPT_TIMEOUT value set by ldap_set_option(3) is used. With
the default setting, the select blocks indefinitely. To
effect a poll, the timeout argument should be a non-NULL
pointer, pointing to a zero-valued timeval structure. To obtain
the behavior of the default setting, bypassing any value set by
ldap_set_option(3), set to -1 the tv_sec field of the timeout
parameter. See select(2) for further details.
If the result of a specific operation is required, msgid should
be set to the invocation identifier returned when the operation
was initiated, otherwise LDAP_RES_ANY or LDAP_RES_UNSOLICITED
should be supplied to wait for any or unsolicited response.
The all parameter, if non-zero, causes ldap_result() to return
all responses with msgid, otherwise only the next response is
returned. This is commonly used to obtain all the responses of a
search operation.
A search response is made up of zero or more search entries, zero
or more search references, and zero or more extended partial
responses followed by a search result. If all is set to 0,
search entries will be returned one at a time as they come in,
via separate calls to ldap_result(). If it's set to 1, the
search response will only be returned in its entirety, i.e.,
after all entries, all references, all extended partial
responses, and the final search result have been received.
Возвращаемое значение (Return value)
Upon success, the type of the result received is returned and the
result parameter will contain the result of the operation;
otherwise, the result parameter is undefined. This result should
be passed to the LDAP parsing routines, ldap_first_message(3) and
friends, for interpretation.
The possible result types returned are:
LDAP_RES_BIND (0x61)
LDAP_RES_SEARCH_ENTRY (0x64)
LDAP_RES_SEARCH_REFERENCE (0x73)
LDAP_RES_SEARCH_RESULT (0x65)
LDAP_RES_MODIFY (0x67)
LDAP_RES_ADD (0x69)
LDAP_RES_DELETE (0x6b)
LDAP_RES_MODDN (0x6d)
LDAP_RES_COMPARE (0x6f)
LDAP_RES_EXTENDED (0x78)
LDAP_RES_INTERMEDIATE (0x79)
The ldap_msgfree() routine is used to free the memory allocated
for result(s) by ldap_result() or ldap_search_ext_s(3) and
friends. It takes a pointer to the result or result chain to be
freed and returns the type of the last message in the chain. If
the parameter is NULL, the function does nothing and returns
zero.
The ldap_msgtype() routine returns the type of a message.
The ldap_msgid() routine returns the message id of a message.
Ошибки (Error)
ldap_result() returns -1 if something bad happens, and zero if
the timeout specified was exceeded. ldap_msgtype() and
ldap_msgid() return -1 on error.
Смотри также (See also)
ldap(3), ldap_first_message(3), select(2)
