Getting the Parent and Suffix DNs

Use the slapi_dn_parent() function to return the parent and slapi_dn_beparent() to return the suffix associated with the entry, as shown in the following example.

Example 5–8 Determining the Parent and Suffix of an Entry (dns.c)

#include "slapi-plugin.h"

int
test_dns(Slapi_PBlock * pb)
{
    char * bind_DN;                    /* DN being used to bind    */
    char * parent_DN;                  /* DN of parent entry       */
    char * suffix_DN;                  /* DN of suffix entry       */
    int    connId, opId, rc = 0;
    long   msgId;

    rc |= slapi_pblock_get(pb, SLAPI_BIND_TARGET,     &bind_DN);
    rc |= slapi_pblock_get(pb, SLAPI_OPERATION_MSGID, &msgId);
    rc |= slapi_pblock_get(pb, SLAPI_CONN_ID,         &connId);
    rc |= slapi_pblock_get(pb, SLAPI_OPERATION_ID,    &opId);
    if (rc != 0) return (-1);

    /* Get the parent DN of the DN being used to bind.             */
    parent_DN = slapi_dn_parent(bind_DN);
    slapi_log_info_ex(
        SLAPI_LOG_INFO_AREA_PLUGIN,
        SLAPI_LOG_INFO_LEVEL_DEFAULT,
        msgId,
        connId,
        opId,
        "test_dns in test-dns plug-in",
        "Parent DN of %s: %s\n", bind_DN, parent_DN
    );

    /* Get the suffix DN of the DN being used to bind.             */
    suffix_DN = slapi_dn_beparent(pb, bind_DN);
    if (suffix_DN != NULL) {
        slapi_log_info_ex(
            SLAPI_LOG_INFO_AREA_PLUGIN,
            SLAPI_LOG_INFO_LEVEL_DEFAULT,
            msgId,
            connId,
            opId,
            "test_dns in test-dns plug-in",
            "Suffix for user (%s) is (%s).\n", bind_DN, suffix_DN
        );
    }

    return rc;
}

Notice that the suffix and parent DNs can be the same if the tree is not complex. For example, if the bind_DN is uid=bjensen,ou=People,dc=example,dc=com, the parent is ou=People,dc=example,dc=com. In this case, the parent is the same as the suffix.