posix_trace_eventid_get_name Subroutine

Purpose

Retrieves the trace event name from a trace event type identifier.

Library

Posix Trace Library (libposixtrace.a)

Syntax

#include <trace.h>

int posix_trace_eventid_get_name(trid, event, event_name)
trace_id_t trid;
trace_event_id_t event;
char *event_name;

Description

The posix_trace_eventid_get_name subroutine returns the trace event name associated with the trace event type identifier for a trace stream or a trace log in the argument pointed to by the event_name parameter. The event argument defines the trace event type identifier. The trid argument defines the trace stream or the trace log. The name of the trace event will have a maximum number of characters defined in the TRACE_EVENT_NAME_MAX variable, which has the minimum value _POSIX_TRACE_EVENT_NAME_MAX. Successive calls to this subroutine with the same trace event type identifier and the same trace stream identifier return the same event name.

Parameters

Item	Description
trid	Specifies the trace stream identifier.
event	Specifies the trace event identifier.
event_name	Specifies the trace event name.

Return Values

On successful completion, the posix_trace_eventid_get_name subroutine returns a value of zero. Otherwise, it returns the corresponding error number.

If successful, the posix_trace_eventid_get_name subroutine stores the trace event name value in the object pointed to by the event_name parameter.

Errors

The posix_trace_eventid_get_name subroutine fails if the following value returns:

Item	Description
EINVAL	The trid argument is not a valid trace stream identifier. The trace event type identifier event is not associated with any name.

File

The trace.h file in AIX® Version 7.1 Files Reference.