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krb5_set_trace_callback - Specify a callback function for trace events.
=========================================================================
..
.. c:function:: krb5_error_code krb5_set_trace_callback(krb5_context context, krb5_trace_callback fn, void * cb_data)
..
:param:
**[in]** **context** - Library context
**[in]** **fn** - Callback function
**[in]** **cb_data** - Callback data
..
:return:
- Returns KRB5_TRACE_NOSUPP if tracing is not supported in the library (unless fn is NULL).
..
Specify a callback for trace events occurring in krb5 operations performed within *context* . *fn* will be invoked with *context* as the first argument, *cb_data* as the last argument, and a pointer to a krb5_trace_info as the second argument. If the trace callback is reset via this function or *context* is destroyed, *fn* will be invoked with a NULL second argument so it can clean up *cb_data* . Supply a NULL value for *fn* to disable trace callbacks within *context* .
..
.. note::
This function overrides the information passed through the *KRB5_TRACE* environment variable.
.. note::
New in 1.9
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