Section: POSIX Programmer's Manual (3P)
This manual page is part of the POSIX Programmer's Manual.
The Linux implementation of this interface may differ (consult
the corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
--- retrieve the trace attributes or trace status
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);
function shall copy the attributes of the active trace stream
into the object pointed to by the
If the Trace Log option is supported,
may represent a pre-recorded trace log.
function shall return, in the structure pointed to by the
argument, the current trace status for the trace stream identified by
argument. These status values returned in the structure pointed to by
shall have been appropriately read to ensure that the returned values
If the Trace Log option is supported and the
argument refers to a pre-recorded trace stream, the status shall be the
status of the completed trace stream.
Each time the
function is used, the overrun status of the trace stream shall be reset
immediately after the call completes.
If the Trace Log option is supported, the
function shall behave the same as when the option is not supported
except for the following differences:
argument refers to a trace stream with log, each time the
function is used, the log overrun status of the trace stream shall be
reset to POSIX_TRACE_NO_OVERRUN and the
status shall be reset to zero immediately after the call completes.
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.
function stores the trace attributes in the object pointed to by
function stores the trace status in the object pointed to by
These functions shall fail if:
The trace stream argument
does not correspond to a valid active trace stream or a valid trace
The following sections are informative.
functions may be removed in a future version.
The Base Definitions volume of POSIX.1-2017,
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1-2017, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, 2018 Edition,
Copyright (C) 2018 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
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