AUPARSE_ADD_CALLBACK(3) Linux Audit API AUPARSE_ADD_CALLBACK(3)

NAME auparse_add_callback - add a callback handler for notifications

SYNOPSIS #include <auparse.h>

void auparse_add_callback(auparse_state_t *au, auparse_callback_ptr callback, void *user_data, user_destroy user_destroy_func);

DESCRIPTION auparse_add_callback adds a callback function to the parse state which is invoked to notify the application of parsing events. This is part of the event feed API.

The signature of the callback is:

void auparse_callback(auparse_state_t *au, auparse_cb_event_t cb_event_type, void *user_data);

When the callback is invoked it is passed:

au a pointer to the parse_state

cb_event_type enumerated value indicating the reason why the callback was invoked

user_data pointer to user supplied private data. May be NULL.

user_destroy_func pointer to function called when user_data is destroyed. May be NULL. The signature is:

void destroy(void *user_data);

The destroy() function should be prepared to accept user_data possibly being NULL.

The cb_event_type argument indicates why the callback was invoked. Its possible values are:

AUPARSE_CB_EVENT_READY A complete event has been parsed and is ready to be examined. This is logically equivalent to the parse state immediately fol- lowing auparse_next_event()

See auparse_feed(3) for a complete code example.

RETURN VALUE Returns the previous callback pointer.

SEE ALSO auparse_feed(3), auparse_flush_feed(3).

AUTHOR John Dennis

Red Hat May 2007 AUPARSE_ADD_CALLBACK(3)