POSIX_TRACE_GET_ATTR(P) POSIX Programmer's Manual POSIX_TRACE_GET_ATTR(P)
posix_trace_get_attr, posix_trace_get_status - retrieve the trace attributes or trace status (TRACING)
int posix_trace_get_attr(trace_id_t trid, trace_attr_t *attr);
int posix_trace_get_status(trace_id_t trid,
struct posix_trace_status_info *statusinfo);
The posix_trace_get_attr() function shall copy the attributes of the active trace stream identified by trid into the object pointed to by
the attr argument. If the Trace Log option is supported, trid may represent a pre-recorded trace log.
The posix_trace_get_status() function shall return, in the structure pointed to by the statusinfo argument, the current trace status for
the trace stream identified by the trid argument. These status values returned in the structure pointed to by statusinfo shall have been
appropriately read to ensure that the returned values are consistent. If the Trace Log option is supported and the trid argument refers
to a pre-recorded trace stream, the status shall be the status of the completed trace stream.
Each time the posix_trace_get_status() function is used, the overrun status of the trace stream shall be reset to POSIX_TRACE_NO_OVERRUN
immediately after the call completes. If the Trace Log option is supported, the posix_trace_get_status() function shall behave the same
as when the option is not supported except for the following differences:
* If the trid argument refers to a trace stream with log, each time the posix_trace_get_status() function is used, the log overrun status
of the trace stream shall be reset to POSIX_TRACE_NO_OVERRUN and the flush_error status shall be reset to zero immediately after the
* If the trid argument refers to a pre-recorded trace stream, the status returned shall be the status of the completed trace stream and
the status values of the trace stream shall not be reset.
Upon successful completion, these functions shall return a value of zero. Otherwise, they shall return the corresponding error number.
The posix_trace_get_attr() function stores the trace attributes in the object pointed to by attr, if successful.
The posix_trace_get_status() function stores the trace status in the object pointed to by statusinfo, if successful.
These functions shall fail if:
EINVAL The trace stream argument trid does not correspond to a valid active trace stream or a valid trace log.
The following sections are informative.
posix_trace_attr_destroy() , posix_trace_attr_init() , posix_trace_create() , posix_trace_open() , the Base Definitions volume of
IEEE Std 1003.1-2001, <trace.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE
and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained
online at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 POSIX_TRACE_GET_ATTR(P)