Registers the specified function as an evaluator that the server will call to generate a computed attribute.

Syntax

#include "slapi-plugin.h"
int slapi_compute_add_evaluator( slapi_compute_callback_t function);

Parameters

The function has the following parameters:

function

Function that you want to register.

Returns

One of the following values:

• 0 if the function is successfully registered.
• ENOMEM if memory cannot be allocated to register this function.

The slapi_compute_add_evaluator() function registers a function of the slapi_compute_callback_t type as an evaluator of computed attributes.

Before the server sends an entry as a search result back to the client, the server determines if any of the requested attributes are computed attributes and generates the values for those attributes.

To do this, the server calls each registered evaluator function for each individually requested attribute. An evaluator function has the type slapi_compute_callback_t. This function returns -1 if it is not responsible for generating the specified attribute, 0 if it successfully generates the attribute, or an LDAP error code (greater than zero) if an error occurs.

If you want to set up the server to generate the value of a computed attribute and send the attribute back with each entry, you can define an evaluator function and register the function with the server by calling the slapi_compute_add_evaluator() function.

Example

[To be added]

See Also