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Oracle Directory Server Enterprise Edition Developer's Guide 11 g Release 1 (
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Part I Directory Server Plug-In API Guide

1.  Before You Start Writing Plug-Ins

2.  Changes to the Plug-In API Since Directory Server 5.2

3.  Getting Started With Directory Server Plug-Ins

4.  Working With Entries Using Plug-Ins

5.  Extending Client Request Handling Using Plug-Ins

Preoperation and Postoperation Plug-Ins

Preoperation Plug-Ins

Postoperation Plug-Ins

Registration Identifiers

Location of Plug-In Examples

Extending the Bind Operation

To Set Up an Example Suffix

Logging the Authentication Method

To Register the Plug-In

To Generate a Bind Log Message

Bypassing Bind Processing in Directory Server

Normal Directory Server Bind Behavior

Extending the Search Operation

Logging Who Requests a Search

Breaking Down a Search Filter

LOG Macros for Compact Code

Parameter Block Contents

Search Filter Info

Building a Filter Info

Normal Directory Server Search Behavior

Extending the Compare Operation

Extending the Add Operation

Prepending a String to an Attribute

Logging the Entry to Add

Extending the Modify Operation

Extending the Rename Operation

Extending the Delete Operation

Intercepting Information Sent to the Client

6.  Handling Authentication Using Plug-Ins

7.  Performing Internal Operations With Plug-Ins

8.  Writing Entry Store and Entry Fetch Plug-Ins

9.  Writing Extended Operation Plug-Ins

10.  Writing Matching Rule Plug-Ins

11.  Writing Password Storage Scheme Plug-Ins

12.  Writing Password Quality Check Plug-Ins

13.  Writing Computed Attribute Plug-Ins

Part II Directory Server Plug-In API Reference

14.  Data Type and Structure Reference

15.  Function Reference, Part I

16.  Function Reference, Part II

17.  Parameter Block Reference

A.  NameFinder Application

Prerequisite Software

Deploying NameFinder

Configuring NameFinder to Access Your Directory

Customizing NameFinder


Extending the Delete Operation

This section shows how to develop functionality called by Directory Server after a client delete 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 5-22 Tracking Entry Deletion (testpostop.c)

#include "slapi-plugin.h"

testpostop_del( Slapi_PBlock *pb )
    char * dn;                         /* DN of entry to delete      */
    int    is_repl = 0;                /* Is this replication?       */
    int    connId, opId, rc = 0;
    long   msgId;

    rc |= slapi_pblock_get(pb, SLAPI_DELETE_TARGET,           &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);
    rc |= slapi_pblock_get(pb, SLAPI_IS_REPLICATED_OPERATION, &is_repl);
    if (rc != 0) return (rc);
        "testpostop_del in test-postop plug-in",
        "Deleted entry (%s)\n", dn

    /* In general, do not interfere in replication operations.       */
    /* Log the DN of the deleted entry to the change log.            */
    if (!is_repl) write_changelog(_DEL, dn, NULL, 0);

    return (rc);

First, check that Quentin’s entry is in the directory as shown in Extending the Modify Operation.

Quentin’s name might be Fred if you have renamed the entry as described in Extending the Rename Operation.

Imagine that Quentin shouted copious verbal abuse at a key customer causing Quentin to be fired from With this plug-in activated in Directory Server, delete his entry.

$ ldapdelete -D uid=kvaughan,ou=people,dc=example,dc=com -w bribery \

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

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

Notice also the information logged to changelog.txt as shown in the following example.

Example 5-23 Example changelog.txt After Deletion

time: 21120506185404
dn: uid=qcubbins,ou=people,dc=example,dc=com
changetype: delete