Extending the Rename Operation

This section demonstrates functionality called by Directory Server after a client modify RDN operation. A preoperation plug-in, not demonstrated here, can be found in install-path/examples/testpreop.c. Refer to install-path/examples/testpostop.c for the source code discussed here.

Before using the plug-in function as described here, set up Directory Server as described in Logging the Entry to Add, making sure to add Quentin’s entry.

The testpostop_modrdn() function logs the DN of the modified entry and also writes the entry to a log managed by the plug-in, changelog.txt. The location of changelog.txt depends on the platform, as shown in the source code.

The following example shows the code that performs the logging.

Example 5-19 Tracking Renamed Entries (testpostop.c)

#include "slapi-plugin.h"

int
testpostop_modrdn( Slapi_PBlock *pb )
{
    char * dn;                         /* DN of entry to rename      */
    char * newrdn;                     /* New RDN                    */
    int    dflag;                      /* Delete the old RDN?        */
    int    is_repl = 0;                /* Is this replication?       */
    int    connId, opId, rc = 0;
    long   msgId;

    rc |= slapi_pblock_get(pb, SLAPI_MODRDN_TARGET,           &dn);
    rc |= slapi_pblock_get(pb, SLAPI_MODRDN_NEWRDN,           &newrdn);
    rc |= slapi_pblock_get(pb, SLAPI_MODRDN_DELOLDRDN,        &dflag);
    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);
    rc |= slapi_pblock_get(pb, SLAPI_IS_REPLICATED_OPERATION, &is_repl);

    if (rc != 0) return (rc);
    slapi_log_info_ex(
        SLAPI_LOG_INFO_AREA_PLUGIN,
        SLAPI_LOG_INFO_LEVEL_DEFAULT,
        msgId,
        connId,
        opId,
        "testpostop_modrdn in test-postop plug-in",
        "Modrdn entry (%s)\n", dn
    );

    /* In general, do not interfere in replication operations.       */
    /* Log the DN of the renamed entry, its new RDN, and the flag
     * indicating whether the old RDN was removed to the change log. */
    if (!is_repl) write_changelog(_MODRDN, dn, (void *) newrdn, dflag);

    return (rc);
}

Check that Quentin’s entry is in the directory as shown in Extending the Modify Operation.

Last weekend, Quentin decided to change his given name to Fred. His user ID is now fcubbins, so his entry must be renamed. With this plug-in activated in Directory Server, modify the entry.

Example 5-20 Renaming an Entry

$ ldapmodify -D uid=kvaughan,ou=people,dc=example,dc=com -w bribery \
 -h localhost -p 1389
dn: uid=qcubbins,ou=People,dc=example,dc=com
changetype: modify
replace: givenName
givenName: Fred

dn: uid=qcubbins,ou=People,dc=example,dc=com
changetype: modify
replace: mail
mail: fcubbins@example.com

dn: uid=qcubbins,ou=People,dc=example,dc=com
changetype: modify
replace: cn
cn: Fred Cubbins

dn: uid=qcubbins,ou=People,dc=example,dc=com
changetype: modrdn
newrdn: uid=fcubbins
deleteoldrdn: 1
^D

Search instance-path/logs/errors for the log message. If you ignore housekeeping information, you get the following message:

Modrdn entry (uid=qcubbins,ou=people,dc=example,dc=com)

Notice also the information that is logged to changelog.txt.

Example 5-21 Example changelog.txt Entry After Rename

time: 21120506184432
dn: uid=qcubbins,ou=people,dc=example,dc=com
changetype: modrdn
newrdn: uid=fcubbins
deleteoldrdn: 1